Nos publications
Blin, Jean-Luc; Michelin, Laure; Lebeau, Benedicte; Naydenov, Anton; Velinova, Ralitsa; Kolev, Hristo; Gaudin, Pierrick; Vidal, Loic; Dotzeva, Anna; Tenchev, Krasimir; Todorova, Silviya Co-Ce Oxides Supported on SBA-15 for VOCs Oxidation Article de journal Catalysts, 11 (3), p. 366, 2021. @article{Blin2021, title = {Co-Ce Oxides Supported on SBA-15 for VOCs Oxidation}, author = {Jean-Luc Blin and Laure Michelin and Benedicte Lebeau and Anton Naydenov and Ralitsa Velinova and Hristo Kolev and Pierrick Gaudin and Loic Vidal and Anna Dotzeva and Krasimir Tenchev and Silviya Todorova}, doi = {10.3390/catal11030366}, year = {2021}, date = {2021-03-01}, journal = {Catalysts}, volume = {11}, number = {3}, pages = {366}, abstract = {Reported here are new data on the structural and catalytic properties of a series of mono-component cobalt and bi-component Co-Ce catalysts supported on SBA-15 (Santa Barbara Amorphous-15)). The catalysts performance has been evaluated by tests on combustion of methane, propane, and n-hexane. It was established that the preparation of the Co-Ce catalysts by the 'two-solvent' technique does not significantly change the mesoporous structure, however, its pores are clogging with the Co and Ce guest species. Cobalt and cerium are uniformly distributed and preferentially fill up the channels of SBA-15, but oxide agglomerates located on the surface are observed as well. The highest activity of the mono-component cobalt sample is explained by its higher reducibility as a result of lower interaction of the cobalt oxide with the SBA-15. The fine dispersion of cobalt and cerium oxide and their strong interaction in the channels of the SBA-15 molecular sieve, leads to the formation of difficult-to-reduce oxide phases and, consequently, to lower catalytic activity compared to monocomponent cobalt oxide catalyst. The synthesised mesoporous structure can prevent the agglomeration of the oxide particles, thus leading to the successful development of a new and stable catalyst for decreasing greenhouse gas emissions.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Reported here are new data on the structural and catalytic properties of a series of mono-component cobalt and bi-component Co-Ce catalysts supported on SBA-15 (Santa Barbara Amorphous-15)). The catalysts performance has been evaluated by tests on combustion of methane, propane, and n-hexane. It was established that the preparation of the Co-Ce catalysts by the 'two-solvent' technique does not significantly change the mesoporous structure, however, its pores are clogging with the Co and Ce guest species. Cobalt and cerium are uniformly distributed and preferentially fill up the channels of SBA-15, but oxide agglomerates located on the surface are observed as well. The highest activity of the mono-component cobalt sample is explained by its higher reducibility as a result of lower interaction of the cobalt oxide with the SBA-15. The fine dispersion of cobalt and cerium oxide and their strong interaction in the channels of the SBA-15 molecular sieve, leads to the formation of difficult-to-reduce oxide phases and, consequently, to lower catalytic activity compared to monocomponent cobalt oxide catalyst. The synthesised mesoporous structure can prevent the agglomeration of the oxide particles, thus leading to the successful development of a new and stable catalyst for decreasing greenhouse gas emissions. |
Ors, Taylan; Gouraud, Fanny; Michel, Vincent; Huger, Marc; Gey, Nathalie; Micha, Jean-Sebastien; Castelnau, Olivier; Guinebretiere, Rene Huge local elastic strains in bulk nanostructured pure zirconia materials Article de journal Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 806 , p. 140817, 2021. @article{Ors2021, title = {Huge local elastic strains in bulk nanostructured pure zirconia materials}, author = {Taylan Ors and Fanny Gouraud and Vincent Michel and Marc Huger and Nathalie Gey and Jean-Sebastien Micha and Olivier Castelnau and Rene Guinebretiere}, doi = {10.1016/j.msea.2021.140817}, year = {2021}, date = {2021-03-01}, journal = {Materials Science and Engineering A-structural Materials Properties Microstructure and Processing}, volume = {806}, pages = {140817}, abstract = {From the liquid state to room temperature, two successive solid-state phase transitions occur in pure zirconia. It is well-known that the last one (tetragonal to monoclinic) is martensitic and induces large volume variations and shear strains. Elastic and inelastic behaviors of zirconia-based materials are strongly influenced by this transition and the associated strain fields that it induces. Knowledge of strain and stress at the crystal scale is thus a crucial point. Using fully dense pure zirconia polycrystals obtained by a fuse casting process, we have determined at a sub-micrometric scale, by X-ray Laue microdiffraction, the strains map at room temperature in as-cast specimens and after a post elaboration high temperature thermal treatment. We observed that the fluctuation of deviatoric elastic strain is huge, the standard deviation of normal component being in the range of 1-2%. The heat treatment tends to even further increase this range of fluctuation, despite the development of a multiscale crack network formed during the cooling. Correspondingly, the associated stress level is also huge. It lies in the 5 GPa range with stress gradient amounting 1 GPa mu m(-1).}, keywords = {}, pubstate = {published}, tppubtype = {article} } From the liquid state to room temperature, two successive solid-state phase transitions occur in pure zirconia. It is well-known that the last one (tetragonal to monoclinic) is martensitic and induces large volume variations and shear strains. Elastic and inelastic behaviors of zirconia-based materials are strongly influenced by this transition and the associated strain fields that it induces. Knowledge of strain and stress at the crystal scale is thus a crucial point. Using fully dense pure zirconia polycrystals obtained by a fuse casting process, we have determined at a sub-micrometric scale, by X-ray Laue microdiffraction, the strains map at room temperature in as-cast specimens and after a post elaboration high temperature thermal treatment. We observed that the fluctuation of deviatoric elastic strain is huge, the standard deviation of normal component being in the range of 1-2%. The heat treatment tends to even further increase this range of fluctuation, despite the development of a multiscale crack network formed during the cooling. Correspondingly, the associated stress level is also huge. It lies in the 5 GPa range with stress gradient amounting 1 GPa mu m(-1). |
Subervie, Daniel; Quemener, Frederic Le; Canterel, Remi; Dugas, Pierre-Yves; Boyron, Olivier; Lalevee, Jacques; Bourgeat-Lami, Elodie; Lansalot, Muriel; Lacote, Emmanuel Visible-Light Emulsion Photopolymerization of Acrylates and Methacrylates: Mechanistic Insights and Introduction of a Simplified Sulfur-Based Photoinitiating System Article de journal Macromolecules, 54 (5), p. 2124–2133, 2021. @article{Subervie2021, title = {Visible-Light Emulsion Photopolymerization of Acrylates and Methacrylates: Mechanistic Insights and Introduction of a Simplified Sulfur-Based Photoinitiating System}, author = {Daniel Subervie and Frederic Le Quemener and Remi Canterel and Pierre-Yves Dugas and Olivier Boyron and Jacques Lalevee and Elodie Bourgeat-Lami and Muriel Lansalot and Emmanuel Lacote}, doi = {10.1021/acs.macromol.0c01692}, year = {2021}, date = {2021-03-01}, journal = {Macromolecules}, volume = {54}, number = {5}, pages = {2124--2133}, abstract = {The emulsion photopolymerization under visible light of acrylate and methacrylate monomers is reported. We previously introduced an NHC-borane-based system that was efficient for the emulsion photopolymerization of styrene [acridine orange (AO)/disulfide/NHC-borane]. This system relies on the disulfide photoreduction from the excited AO, followed by H-atom abstraction from the NHC-borane by the thiyl radical generated from the disulfide, eventually forming initiating NHC-boryl radicals. For the photopolymerization of (meth)acrylates, the boron-based photoinitiating system was simplified; as under LED illumination, the water-soluble disulfide alone is able to generate thiyl radicals that could initiate the polymerizations. With this disulfide/blue light system, MMA efficiently polymerized in emulsion, with solid contents up to 40%. The simplified system led to smaller particles than the full photoinitiating boron-based system, but the latter gave slightly better particle size distributions. Compared to styrene, the particle sizes attained for MMA were generally smaller. The disulfide photoinitiator gives access to a wide range of poly(meth)acrylic latexes, but it does not initiate the photopolymerization of styrene. We suggest that the propagation rate prevails on monomer solubility in the case of (meth)acrylates, which explains the efficiency of the photopolymerization with a much weaker initiating system. The method can also lead to the production of random copolymer latexes, such as P(MMA-co-St) and the film-forming P(MMA-co-BA). The fact that the disulfide is able to lead to the former further supports the predominant role of the propagation rate on the polymerization. Finally, the polymerization allows for temporal control. It proceeds under light and stops in the dark.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The emulsion photopolymerization under visible light of acrylate and methacrylate monomers is reported. We previously introduced an NHC-borane-based system that was efficient for the emulsion photopolymerization of styrene [acridine orange (AO)/disulfide/NHC-borane]. This system relies on the disulfide photoreduction from the excited AO, followed by H-atom abstraction from the NHC-borane by the thiyl radical generated from the disulfide, eventually forming initiating NHC-boryl radicals. For the photopolymerization of (meth)acrylates, the boron-based photoinitiating system was simplified; as under LED illumination, the water-soluble disulfide alone is able to generate thiyl radicals that could initiate the polymerizations. With this disulfide/blue light system, MMA efficiently polymerized in emulsion, with solid contents up to 40%. The simplified system led to smaller particles than the full photoinitiating boron-based system, but the latter gave slightly better particle size distributions. Compared to styrene, the particle sizes attained for MMA were generally smaller. The disulfide photoinitiator gives access to a wide range of poly(meth)acrylic latexes, but it does not initiate the photopolymerization of styrene. We suggest that the propagation rate prevails on monomer solubility in the case of (meth)acrylates, which explains the efficiency of the photopolymerization with a much weaker initiating system. The method can also lead to the production of random copolymer latexes, such as P(MMA-co-St) and the film-forming P(MMA-co-BA). The fact that the disulfide is able to lead to the former further supports the predominant role of the propagation rate on the polymerization. Finally, the polymerization allows for temporal control. It proceeds under light and stops in the dark. |
Yatsui, Takashi; Brandenburg, Felix; Leuschel, Benjamin; Soppera, Olivier Synthesis of silver nanostructure on gold nanoparticle using near field assisted second harmonic generation. Article de journal Scientific reports, 11 (1), p. 5642–5642, 2021. @article{Yatsui2021, title = {Synthesis of silver nanostructure on gold nanoparticle using near field assisted second harmonic generation.}, author = {Takashi Yatsui and Felix Brandenburg and Benjamin Leuschel and Olivier Soppera}, doi = {10.1038/s41598-021-84944-w}, year = {2021}, date = {2021-03-01}, journal = {Scientific reports}, volume = {11}, number = {1}, pages = {5642--5642}, abstract = {By using gold (Au) nanoparticles (NPs) as an optical near-field source under far-field illumination in combination with a silver (Ag) ion solution containing a photoinitiator, we coated Ag on Au NPs using a near-field (NF)-assisted process. We evaluated the change in the size of the NPs using transmission electron microscopy. Evaluation of the synthesized Ag volume over illumination power confirmed the squared power dependence of the NP volume with illumination using 808nm light, i.e., a wavelength longer than the absorption edge wavelength of the photoinitiator molecules. The rate of volume increase was much lower than the plasmonic field enhancement effect. Therefore, the squared power dependency of the volume increase using a wavelength longer than the absorption edge wavelength originated from NF-assisted second-harmonic generation and the resulting excitation.}, keywords = {}, pubstate = {published}, tppubtype = {article} } By using gold (Au) nanoparticles (NPs) as an optical near-field source under far-field illumination in combination with a silver (Ag) ion solution containing a photoinitiator, we coated Ag on Au NPs using a near-field (NF)-assisted process. We evaluated the change in the size of the NPs using transmission electron microscopy. Evaluation of the synthesized Ag volume over illumination power confirmed the squared power dependence of the NP volume with illumination using 808nm light, i.e., a wavelength longer than the absorption edge wavelength of the photoinitiator molecules. The rate of volume increase was much lower than the plasmonic field enhancement effect. Therefore, the squared power dependency of the volume increase using a wavelength longer than the absorption edge wavelength originated from NF-assisted second-harmonic generation and the resulting excitation. |
Mouafo, Louis Donald Notemgnou; Godel, Florian; Simon, Laurent; Dappe, Yannick J; Baaziz, Walid; Noumbe, Ulrich Nguetchuissi; Lorchat, Etienne; Martin, Marie-Blandine; Berciaud, Stephane; Doudin, Bernard; Ersen, Ovidiu; Dlubak, Bruno; Seneor, Pierre; Dayen, Jean-Francois 0D/2D Heterostructures Vertical Single Electron Transistor Article de journal Advanced Functional Materials, 31 (9), p. 2008255, 2021. @article{Mouafo2021, title = {0D/2D Heterostructures Vertical Single Electron Transistor}, author = {Louis Donald Notemgnou Mouafo and Florian Godel and Laurent Simon and Yannick J Dappe and Walid Baaziz and Ulrich Nguetchuissi Noumbe and Etienne Lorchat and Marie-Blandine Martin and Stephane Berciaud and Bernard Doudin and Ovidiu Ersen and Bruno Dlubak and Pierre Seneor and Jean-Francois Dayen}, doi = {10.1002/adfm.202008255}, year = {2021}, date = {2021-02-01}, journal = {Advanced Functional Materials}, volume = {31}, number = {9}, pages = {2008255}, abstract = {Mixed-dimensional heterostructures formed by the stacking of 2D materials with nanostructures of distinct dimensionality constitute a new class of nanomaterials that offers multifunctionality that goes beyond those of single dimensional systems. An unexplored architecture of single electron transistor (SET) is developed that employs heterostructures made of nanoclusters (0D) grown on a 2D molybdenum disulfide (MoS2) channel. Combining the large Coulomb energy of the nanoclusters with the electronic capabilities of the 2D layer, the concept of 0D-2D vertical SET is unveiled. The MoS2 underneath serves both as a charge tunable channel interconnecting the electrode, and as bottom electrode for each v-SET cell. In addition, its atomic thickness makes it thinner than the Debye screening length, providing electric field transparency functionality that allows for an efficient electric back gate control of the nanoclusters charge state. The Coulomb diamond pattern characteristics of SET are reported, with specific doping dependent nonlinear features arising from the 0D/2D geometry that are elucidated by theoretical modeling. These results hold promise for multifunctional single electron device taking advantage of the versatility of the 2D materials library, with as example envisioned spintronics applications while coupling quantum dots to magnetic 2D material, or to ferroelectric layers for neuromorphic devices.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Mixed-dimensional heterostructures formed by the stacking of 2D materials with nanostructures of distinct dimensionality constitute a new class of nanomaterials that offers multifunctionality that goes beyond those of single dimensional systems. An unexplored architecture of single electron transistor (SET) is developed that employs heterostructures made of nanoclusters (0D) grown on a 2D molybdenum disulfide (MoS2) channel. Combining the large Coulomb energy of the nanoclusters with the electronic capabilities of the 2D layer, the concept of 0D-2D vertical SET is unveiled. The MoS2 underneath serves both as a charge tunable channel interconnecting the electrode, and as bottom electrode for each v-SET cell. In addition, its atomic thickness makes it thinner than the Debye screening length, providing electric field transparency functionality that allows for an efficient electric back gate control of the nanoclusters charge state. The Coulomb diamond pattern characteristics of SET are reported, with specific doping dependent nonlinear features arising from the 0D/2D geometry that are elucidated by theoretical modeling. These results hold promise for multifunctional single electron device taking advantage of the versatility of the 2D materials library, with as example envisioned spintronics applications while coupling quantum dots to magnetic 2D material, or to ferroelectric layers for neuromorphic devices. |
Jeguirim, Mejdi; Jellali, Salah Wastewater Treatment, Valorization, and Reuse Article de journal Water, 13 (4), p. 548, 2021. @article{Jeguirim2021, title = {Wastewater Treatment, Valorization, and Reuse}, author = {Mejdi Jeguirim and Salah Jellali}, doi = {10.3390/w13040548}, year = {2021}, date = {2021-02-01}, journal = {Water}, volume = {13}, number = {4}, pages = {548}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Rougerie, Pablo; dos Santos, Rafaela Silva; Farina, Marcos; Anselme, Karine Molecular Mechanisms of Topography Sensing by Osteoblasts: An Update Article de journal Applied Sciences-basel, 11 (4), p. 1791, 2021. @article{Rougerie2021, title = {Molecular Mechanisms of Topography Sensing by Osteoblasts: An Update}, author = {Pablo Rougerie and Rafaela Silva dos Santos and Marcos Farina and Karine Anselme}, doi = {10.3390/app11041791}, year = {2021}, date = {2021-02-01}, journal = {Applied Sciences-basel}, volume = {11}, number = {4}, pages = {1791}, abstract = {Featured Application The evaluation of the behavior of cultured cells on substrates with controlled topographies can contribute significantly to the optimization of biomaterials for bioengineering, due to the fact that cells are able to recognize topographies at different length scales and can be influenced by them. This review aims to bring together studies in the field that identify important molecular factors involved in this mechanism. In the case of osteoblasts, specific surface topographies of biomaterials used as bone grafts could lead to a fast recovery of bone defects associated with expected tissue homeostasis. In this review we have brought up the present knowledge on the interaction of osteoblasts with different substrates and we expect that its content can help in the future design of the next generation of materials for bone engineering. Bone is a specialized tissue formed by different cell types and a multiscale, complex mineralized matrix. The architecture and the surface chemistry of this microenvironment can be factors of considerable influence on cell biology, and can affect cell proliferation, commitment to differentiation, gene expression, matrix production and/or composition. It has been shown that osteoblasts encounter natural motifs in vivo, with various topographies (shapes, sizes, organization), and that cell cultures on flat surfaces do not reflect the total potential of the tissue. Therefore, studies investigating the role of topographies on cell behavior are important in order to better understand the interaction between cells and surfaces, to improve osseointegration processes in vivo between tissues and biomaterials, and to find a better topographic surface to enhance bone repair. In this review, we evaluate the main available data about surface topographies, techniques for topographies' production, mechanical signal transduction from surfaces to cells and the impact of cell-surface interactions on osteoblasts or preosteoblasts' behavior.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Featured Application The evaluation of the behavior of cultured cells on substrates with controlled topographies can contribute significantly to the optimization of biomaterials for bioengineering, due to the fact that cells are able to recognize topographies at different length scales and can be influenced by them. This review aims to bring together studies in the field that identify important molecular factors involved in this mechanism. In the case of osteoblasts, specific surface topographies of biomaterials used as bone grafts could lead to a fast recovery of bone defects associated with expected tissue homeostasis. In this review we have brought up the present knowledge on the interaction of osteoblasts with different substrates and we expect that its content can help in the future design of the next generation of materials for bone engineering. Bone is a specialized tissue formed by different cell types and a multiscale, complex mineralized matrix. The architecture and the surface chemistry of this microenvironment can be factors of considerable influence on cell biology, and can affect cell proliferation, commitment to differentiation, gene expression, matrix production and/or composition. It has been shown that osteoblasts encounter natural motifs in vivo, with various topographies (shapes, sizes, organization), and that cell cultures on flat surfaces do not reflect the total potential of the tissue. Therefore, studies investigating the role of topographies on cell behavior are important in order to better understand the interaction between cells and surfaces, to improve osseointegration processes in vivo between tissues and biomaterials, and to find a better topographic surface to enhance bone repair. In this review, we evaluate the main available data about surface topographies, techniques for topographies' production, mechanical signal transduction from surfaces to cells and the impact of cell-surface interactions on osteoblasts or preosteoblasts' behavior. |
Anfar, Zakaria; Fakir, Abdellah Ait El; Zbair, Mohamed; Hafidi, Zakaria; Amedlous, Abdallah; Majdoub, Mohammed; Farsad, Salaheddine; Amjlef, Asma; Jada, Amane; Alem, Noureddine El Chemical Engineering Journal, 405 , p. 126660, 2021. @article{Anfar2021, title = {New functionalization approach synthesis of Sulfur doped, Nitrogen doped and Co-doped porous carbon: Superior metal-free Carbocatalyst for the catalytic oxidation of aqueous organics pollutants}, author = {Zakaria Anfar and Abdellah Ait El Fakir and Mohamed Zbair and Zakaria Hafidi and Abdallah Amedlous and Mohammed Majdoub and Salaheddine Farsad and Asma Amjlef and Amane Jada and Noureddine El Alem}, doi = {10.1016/j.cej.2020.126660}, year = {2021}, date = {2021-02-01}, journal = {Chemical Engineering Journal}, volume = {405}, pages = {126660}, abstract = {New green synthesis methods of novel commercially applicable carbocatalysts suitable for the catalytic oxidation of organic pollutants, remain a challenge. Herein, Nitrogen doped (N-PC), Sulfur doped (S-PC) and Co-doped (N, S-PC) porous carbon, were synthesized via a new facile environmentally functionalization approach followed by pyrolysis. Thus, Almond Shell (AS) as Bio-sourced material was used for porous carbon (PC) preparation as support. Thereafter, the introduction of Melamine, Diphenyl Disulfide and Thiourea on the PC matrix with high-COCl- and -CCl- groups facilitated the surface functionalization, and allowed us the introduction of high N and S heteroatoms contents in the PC networks surface. It was found that the optimized carbocatalysts could effectively activate PS, and exhibited excellent catalytic performances for the organic pollutants degradation, with an exceptionally low activation energy and fast kinetic reaction. Based on a systematic comparison, it was found that the N-PC exhibited the superior catalytic activity for activating the PS and degrading various organic pollutants. Such superior catalytic activity of the N-PC Carbocatalyst resulted from its high surface area, its low defect degree with the higher content of Graphitic-N. In addition, all experimental and theoretical investigations demonstrated the critical role of graphitic-N for the PS activation. It is expected that the doping process by N will significantly break the chemical inertness of the PC network and will make the N-PC surface more positively charged accelerating hence its interaction with the negatively charged S2O82-. Furthermore, the O-1(2) was found to be the predominant reactive oxygen species (ROS) as assessed by radical scavenging tests and EPR experi-ments. The carbocatalysts were not easily influenced by the water aqueous phase, which give us more obvious advantages over the PS activation.}, keywords = {}, pubstate = {published}, tppubtype = {article} } New green synthesis methods of novel commercially applicable carbocatalysts suitable for the catalytic oxidation of organic pollutants, remain a challenge. Herein, Nitrogen doped (N-PC), Sulfur doped (S-PC) and Co-doped (N, S-PC) porous carbon, were synthesized via a new facile environmentally functionalization approach followed by pyrolysis. Thus, Almond Shell (AS) as Bio-sourced material was used for porous carbon (PC) preparation as support. Thereafter, the introduction of Melamine, Diphenyl Disulfide and Thiourea on the PC matrix with high-COCl- and -CCl- groups facilitated the surface functionalization, and allowed us the introduction of high N and S heteroatoms contents in the PC networks surface. It was found that the optimized carbocatalysts could effectively activate PS, and exhibited excellent catalytic performances for the organic pollutants degradation, with an exceptionally low activation energy and fast kinetic reaction. Based on a systematic comparison, it was found that the N-PC exhibited the superior catalytic activity for activating the PS and degrading various organic pollutants. Such superior catalytic activity of the N-PC Carbocatalyst resulted from its high surface area, its low defect degree with the higher content of Graphitic-N. In addition, all experimental and theoretical investigations demonstrated the critical role of graphitic-N for the PS activation. It is expected that the doping process by N will significantly break the chemical inertness of the PC network and will make the N-PC surface more positively charged accelerating hence its interaction with the negatively charged S2O82-. Furthermore, the O-1(2) was found to be the predominant reactive oxygen species (ROS) as assessed by radical scavenging tests and EPR experi-ments. The carbocatalysts were not easily influenced by the water aqueous phase, which give us more obvious advantages over the PS activation. |
Liu, Shaohui; Brunel, Damien; Noirbent, Guillaume; Mau, Alexandre; Chen, Hong; Morlet-Savary, Fabrice; Graff, Bernadette; Gigmes, Didier; Xiao, Pu; Dumur, Frederic; Lalevee, Jacques New multifunctional benzophenone-based photoinitiators with high migration stability and their applications in 3D printing Article de journal Materials Chemistry Frontiers, 5 (4), p. 1982–1994, 2021. @article{Liu2021, title = {New multifunctional benzophenone-based photoinitiators with high migration stability and their applications in 3D printing}, author = {Shaohui Liu and Damien Brunel and Guillaume Noirbent and Alexandre Mau and Hong Chen and Fabrice Morlet-Savary and Bernadette Graff and Didier Gigmes and Pu Xiao and Frederic Dumur and Jacques Lalevee}, doi = {10.1039/d0qm00885k}, year = {2021}, date = {2021-02-01}, journal = {Materials Chemistry Frontiers}, volume = {5}, number = {4}, pages = {1982--1994}, abstract = {In this paper, seven new photoinitiators based on the benzophenone scaffold are specifically designed for photopolymerization under mild conditions upon light-emitting diode (LED) irradiation, i.e. four benzophenone-triphenylamine photoinitiators (denoted as BT1-BT4) and three benzophenone-carbazole photoinitiators (denoted as BC1-BC3). Noticeably, these structures have never been reported in the literature except for BT4, so these molecules have been specifically designed for photopolymerization applications. Remarkably, various combinations of chemical groups were investigated in this work to determine the effects of the substitution patterns on their photoinitiation abilities. The formation of benzophenone-triphenylamine and benzophenone-carbazole hybrid structures not only contributes to red-shift of the absorption maxima but also strongly enhances their molar extinction coefficients. The different compounds showed high photoinitiation abilities upon irradiation with an LED@405 nm, and the free radical photopolymerization of acrylates and the cationic polymerization of epoxides could be promoted with high final function conversions (e.g. 77% for the BT3/iodonium salt/amine system in free radical photopolymerization). Remarkably, these new PIs are also able to sensitize sulfonium salts upon irradiation @405 nm. Markedly, because of the benzophenone moiety, a monocomponent Type II PI behavior could be observed, e.g. these compounds could initiate the polymerization alone. Remarkably, benzophenone-triphenylamine compounds BT2, BT3 and BT4 exhibited better hydrogen abstraction abilities as Type II photoinitiators than the benchmark and commercial photoinitiator 2-isopropylthioxanthone in the absence of amines as well as in the presence of amines. Furthermore, the interaction between the photoinitiators and the different additives was investigated by steady state photolysis and fluorescence quenching experiments. The free radical generation in the BT3/amine system was confirmed by the electron spin resonance-spin trapping technique, and the chemical mechanisms related to the polymerization efficiency are discussed. In addition, the migration stability of BT3 was investigated, which was excellent due to its high molecular weight and its trifunctional character. Finally, the three-component photoinitiating system based on BT3 was successfully applied in 3D printing and the 3D patterns showed a good spatial resolution.}, keywords = {}, pubstate = {published}, tppubtype = {article} } In this paper, seven new photoinitiators based on the benzophenone scaffold are specifically designed for photopolymerization under mild conditions upon light-emitting diode (LED) irradiation, i.e. four benzophenone-triphenylamine photoinitiators (denoted as BT1-BT4) and three benzophenone-carbazole photoinitiators (denoted as BC1-BC3). Noticeably, these structures have never been reported in the literature except for BT4, so these molecules have been specifically designed for photopolymerization applications. Remarkably, various combinations of chemical groups were investigated in this work to determine the effects of the substitution patterns on their photoinitiation abilities. The formation of benzophenone-triphenylamine and benzophenone-carbazole hybrid structures not only contributes to red-shift of the absorption maxima but also strongly enhances their molar extinction coefficients. The different compounds showed high photoinitiation abilities upon irradiation with an LED@405 nm, and the free radical photopolymerization of acrylates and the cationic polymerization of epoxides could be promoted with high final function conversions (e.g. 77% for the BT3/iodonium salt/amine system in free radical photopolymerization). Remarkably, these new PIs are also able to sensitize sulfonium salts upon irradiation @405 nm. Markedly, because of the benzophenone moiety, a monocomponent Type II PI behavior could be observed, e.g. these compounds could initiate the polymerization alone. Remarkably, benzophenone-triphenylamine compounds BT2, BT3 and BT4 exhibited better hydrogen abstraction abilities as Type II photoinitiators than the benchmark and commercial photoinitiator 2-isopropylthioxanthone in the absence of amines as well as in the presence of amines. Furthermore, the interaction between the photoinitiators and the different additives was investigated by steady state photolysis and fluorescence quenching experiments. The free radical generation in the BT3/amine system was confirmed by the electron spin resonance-spin trapping technique, and the chemical mechanisms related to the polymerization efficiency are discussed. In addition, the migration stability of BT3 was investigated, which was excellent due to its high molecular weight and its trifunctional character. Finally, the three-component photoinitiating system based on BT3 was successfully applied in 3D printing and the 3D patterns showed a good spatial resolution. |
Rahal, Mahmoud; Mokbel, Haifaa; Graff, Bernadette; Pertici, Vincent; Gigmes, Didier; Toufaily, Joumana; Hamieh, Tayssir; Dumur, Frederic; Lalevee, Jacques Naphthalimide-Based Dyes as Photoinitiators under Visible Light Irradiation and their Applications: Photocomposite Synthesis, 3D printing and Polymerization in Water Article de journal Chemphotochem, 2021. @article{Rahal2021, title = {Naphthalimide-Based Dyes as Photoinitiators under Visible Light Irradiation and their Applications: Photocomposite Synthesis, 3D printing and Polymerization in Water}, author = {Mahmoud Rahal and Haifaa Mokbel and Bernadette Graff and Vincent Pertici and Didier Gigmes and Joumana Toufaily and Tayssir Hamieh and Frederic Dumur and Jacques Lalevee}, doi = {10.1002/cptc.202000306}, year = {2021}, date = {2021-02-01}, journal = {Chemphotochem}, publisher = {Wiley}, abstract = {In this work, six new fluorescent dyes derived from the naphthalimide scaffold (Napht1-Napht6) were synthesized and used as high-performance photoinitiating systems (PISs) in two and three-component systems (combined with iodonium salt (Iod) and/or an electron donor amine (such as N-phenylglycine[NPG])) for the radical photopolymerization of acrylate and methacrylate monomers under visible light using a light-emitting diode at 405 nm. Markedly, these dyes were never synthesized before. In fact, these PISs showed high initiation efficiency with both demonstrating high final reactive function conversions and high polymerization rates. A further interest of our study is to determine the effect of the different substituents (chromophoric group) on the naphthalimide function, concerning the efficiency of initiation of the free radical polymerization. In order to improve the mechanical properties of the obtained polymers, these derivatives were also tested for the photopolymerization of a blend of acrylate/epoxy monomers (TA/EPOX); these latter properties were characterized by traction tests. To demonstrate the initiation efficiency of these dyes, several methods and characterization techniques were used, including steady state photolysis, real-time Fourier transform infrared spectroscopy, emission spectroscopy as well as cyclic voltammetry. In our study, these naphthalimides were used for the synthesis of photocomposites (one and multiple layers of glass fibres) using a UV@395 nm (4 W/cm(2)) conveyor, as well as in the preparation of 3D printed polymers. Markedly, one of the naphthalimide derivatives (Napht-4) can be used as a new high-performance water soluble photoinitiator for photopolymerization in water and hydrogel synthesis.}, keywords = {}, pubstate = {published}, tppubtype = {article} } In this work, six new fluorescent dyes derived from the naphthalimide scaffold (Napht1-Napht6) were synthesized and used as high-performance photoinitiating systems (PISs) in two and three-component systems (combined with iodonium salt (Iod) and/or an electron donor amine (such as N-phenylglycine[NPG])) for the radical photopolymerization of acrylate and methacrylate monomers under visible light using a light-emitting diode at 405 nm. Markedly, these dyes were never synthesized before. In fact, these PISs showed high initiation efficiency with both demonstrating high final reactive function conversions and high polymerization rates. A further interest of our study is to determine the effect of the different substituents (chromophoric group) on the naphthalimide function, concerning the efficiency of initiation of the free radical polymerization. In order to improve the mechanical properties of the obtained polymers, these derivatives were also tested for the photopolymerization of a blend of acrylate/epoxy monomers (TA/EPOX); these latter properties were characterized by traction tests. To demonstrate the initiation efficiency of these dyes, several methods and characterization techniques were used, including steady state photolysis, real-time Fourier transform infrared spectroscopy, emission spectroscopy as well as cyclic voltammetry. In our study, these naphthalimides were used for the synthesis of photocomposites (one and multiple layers of glass fibres) using a UV@395 nm (4 W/cm(2)) conveyor, as well as in the preparation of 3D printed polymers. Markedly, one of the naphthalimide derivatives (Napht-4) can be used as a new high-performance water soluble photoinitiator for photopolymerization in water and hydrogel synthesis. |
Ma, Yik-Ken; Rigolet, Severinne; Michelin, Laure; Paillaud, Jean-Louis; Mintova, Svetlana; Khoerunnisa, Fitri; Daou, Jean T; Ng, Eng-Poh Facile and fast determination of Si/Al ratio of zeolites using FTIR spectroscopy technique Article de journal Microporous and Mesoporous Materials, 311 , p. 110683, 2021. @article{Ma2021, title = {Facile and fast determination of Si/Al ratio of zeolites using FTIR spectroscopy technique}, author = {Yik-Ken Ma and Severinne Rigolet and Laure Michelin and Jean-Louis Paillaud and Svetlana Mintova and Fitri Khoerunnisa and Jean T Daou and Eng-Poh Ng}, doi = {10.1016/j.micromeso.2020.110683}, year = {2021}, date = {2021-02-01}, journal = {Microporous and Mesoporous Materials}, volume = {311}, pages = {110683}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Xu, Yangyang; Noirbent, Guillaume; Brunel, Damien; Ding, Zhaofu; Gigmes, Didier; Graff, Bernadette; Xiao, Pu; Dumur, Frederic; Lalevee, Jacques Allyloxy ketones as efficient photoinitiators with high migration stability in free radical polymerization and 3D printing Article de journal Dyes and Pigments, 185 , p. 108900, 2021. @article{Xu2021, title = {Allyloxy ketones as efficient photoinitiators with high migration stability in free radical polymerization and 3D printing}, author = {Yangyang Xu and Guillaume Noirbent and Damien Brunel and Zhaofu Ding and Didier Gigmes and Bernadette Graff and Pu Xiao and Frederic Dumur and Jacques Lalevee}, doi = {10.1016/j.dyepig.2020.108900}, year = {2021}, date = {2021-02-01}, journal = {Dyes and Pigments}, volume = {185}, pages = {108900}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Zhang, Yijun; Xu, Yangyang; Simon-Masseron, Angelique; Lalevee, Jacques Radical photoinitiation with LEDs and applications in the 3D printing of composites. Article de journal Chemical Society reviews, 2021. @article{Zhang2021, title = {Radical photoinitiation with LEDs and applications in the 3D printing of composites.}, author = {Yijun Zhang and Yangyang Xu and Angelique Simon-Masseron and Jacques Lalevee}, doi = {10.1039/d0cs01411g}, year = {2021}, date = {2021-02-01}, journal = {Chemical Society reviews}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Revol, Baptiste Paul; Vauthier, Madeline; Thomassey, Matthieu; Bouquey, Michel; Ruch, Frederic; Nardin, Michel Design of experience to evaluate the Interfacial compatibility on high tenacity viscose fibers reinforced Polyamide-6 composites Article de journal Composites Science and Technology, 203 , p. 108615, 2021. @article{Revol2021, title = {Design of experience to evaluate the Interfacial compatibility on high tenacity viscose fibers reinforced Polyamide-6 composites}, author = {Baptiste Paul Revol and Madeline Vauthier and Matthieu Thomassey and Michel Bouquey and Frederic Ruch and Michel Nardin}, doi = {10.1016/j.compscitech.2020.108615}, year = {2021}, date = {2021-02-01}, journal = {Composites Science and Technology}, volume = {203}, pages = {108615}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Gaca, Magdalena; Ilcikova, Marketa; Mrlik, Miroslav; Cvek, Martin; Vaulot, Cyril; Urbanek, Pavel; Pietrasik, Robert; Krupa, Igor; Pietrasik, Joanna Impact of ionic liquids on the processing and photo-actuation behavior of SBR composites containing graphene nanoplatelets Article de journal Sensors and Actuators B-chemical, 329 , p. 129195, 2021. @article{Gaca2021, title = {Impact of ionic liquids on the processing and photo-actuation behavior of SBR composites containing graphene nanoplatelets}, author = {Magdalena Gaca and Marketa Ilcikova and Miroslav Mrlik and Martin Cvek and Cyril Vaulot and Pavel Urbanek and Robert Pietrasik and Igor Krupa and Joanna Pietrasik}, doi = {10.1016/j.snb.2020.129195}, year = {2021}, date = {2021-02-01}, journal = {Sensors and Actuators B-chemical}, volume = {329}, pages = {129195}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Riikonen, Joakim; Rantanen, Jimi; Thapa, Rinez; Le, Nguyen T; Rigolet, Severinne; Fioux, Philippe; Turhanen, Petri; Bodiford, Nelli K; Kalluri, Jhansi R; Ikonen, Timo; Nissinen, Tuomo; Lebeau, Benedicte; Vepsalainen, Jouko; Coffer, Jeffery L; Lehto, Vesa-Pekka Rapid synthesis of nanostructured porous silicon carbide from biogenic silica Article de journal Journal of the American Ceramic Society, 104 (2), p. 766–775, 2021. @article{Riikonen2021b, title = {Rapid synthesis of nanostructured porous silicon carbide from biogenic silica}, author = {Joakim Riikonen and Jimi Rantanen and Rinez Thapa and Nguyen T Le and Severinne Rigolet and Philippe Fioux and Petri Turhanen and Nelli K Bodiford and Jhansi R Kalluri and Timo Ikonen and Tuomo Nissinen and Benedicte Lebeau and Jouko Vepsalainen and Jeffery L Coffer and Vesa-Pekka Lehto}, doi = {10.1111/jace.17519}, year = {2021}, date = {2021-02-01}, journal = {Journal of the American Ceramic Society}, volume = {104}, number = {2}, pages = {766--775}, abstract = {Nanostructured silicon carbide (SiC) is an exceptional material with numerous applications, for example, in catalysis, biomedicine, high-performance composites, and sensing. In this study, a fast and scalable method of producing nanostructured SiC from plant materials by magnesiothermic reduction via self-propagating high-temperature synthesis (SHS) route was developed. The produced biogenic material possessed a high surface area above 200 m(2)/g with a SiC crystallite size below 10 nm, which has not been done previously by SHS. This method enables affordable synthesis of the material plant-based precursors in a reaction that only takes a few seconds, thereby paving a way for nanostructured SiC production in high volumes using renewable resources. The material was also functionalized with carboxylic acid and bisphosphonate moieties, and its use as metal adsorbent in applications such as wastewater remediation was demonstrated.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Nanostructured silicon carbide (SiC) is an exceptional material with numerous applications, for example, in catalysis, biomedicine, high-performance composites, and sensing. In this study, a fast and scalable method of producing nanostructured SiC from plant materials by magnesiothermic reduction via self-propagating high-temperature synthesis (SHS) route was developed. The produced biogenic material possessed a high surface area above 200 m(2)/g with a SiC crystallite size below 10 nm, which has not been done previously by SHS. This method enables affordable synthesis of the material plant-based precursors in a reaction that only takes a few seconds, thereby paving a way for nanostructured SiC production in high volumes using renewable resources. The material was also functionalized with carboxylic acid and bisphosphonate moieties, and its use as metal adsorbent in applications such as wastewater remediation was demonstrated. |
Riikonen, Joakim; Rantanen, Jimi; Thapa, Rinez; Le, Nguyen T; Rigolet, Severinne; Fioux, Philippe; Turhanen, Petri; Bodiford, Nelli K; Kalluri, Jhansi R; Ikonen, Timo; Nissinen, Tuomo; Lebeau, Benedicte; Vepsalainen, Jouko; Coffer, Jeffery L; Lehto, Vesa-Pekka Rapid synthesis of nanostructured porous silicon carbide from biogenic silica Article de journal Journal of the American Ceramic Society, 104 (2), p. 766–775, 2021. @article{Riikonen2021, title = {Rapid synthesis of nanostructured porous silicon carbide from biogenic silica}, author = { Joakim Riikonen and Jimi Rantanen and Rinez Thapa and Nguyen T. Le and Severinne Rigolet and Philippe Fioux and Petri Turhanen and Nelli K. Bodiford and Jhansi R. Kalluri and Timo Ikonen and Tuomo Nissinen and Benedicte Lebeau and Jouko Vepsalainen and Jeffery L. Coffer and Vesa-Pekka Lehto}, doi = {10.1111/jace.17519}, year = {2021}, date = {2021-02-01}, journal = {Journal of the American Ceramic Society}, volume = {104}, number = {2}, pages = {766--775}, abstract = {Nanostructured silicon carbide (SiC) is an exceptional material with numerous applications, for example, in catalysis, biomedicine, high-performance composites, and sensing. In this study, a fast and scalable method of producing nanostructured SiC from plant materials by magnesiothermic reduction via self-propagating high-temperature synthesis (SHS) route was developed. The produced biogenic material possessed a high surface area above 200 m(2)/g with a SiC crystallite size below 10 nm, which has not been done previously by SHS. This method enables affordable synthesis of the material plant-based precursors in a reaction that only takes a few seconds, thereby paving a way for nanostructured SiC production in high volumes using renewable resources. The material was also functionalized with carboxylic acid and bisphosphonate moieties, and its use as metal adsorbent in applications such as wastewater remediation was demonstrated.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Nanostructured silicon carbide (SiC) is an exceptional material with numerous applications, for example, in catalysis, biomedicine, high-performance composites, and sensing. In this study, a fast and scalable method of producing nanostructured SiC from plant materials by magnesiothermic reduction via self-propagating high-temperature synthesis (SHS) route was developed. The produced biogenic material possessed a high surface area above 200 m(2)/g with a SiC crystallite size below 10 nm, which has not been done previously by SHS. This method enables affordable synthesis of the material plant-based precursors in a reaction that only takes a few seconds, thereby paving a way for nanostructured SiC production in high volumes using renewable resources. The material was also functionalized with carboxylic acid and bisphosphonate moieties, and its use as metal adsorbent in applications such as wastewater remediation was demonstrated. |
Chen, Hong; Noirbent, Guillaume; Liu, Shaohui; Brunel, Damien; Graff, Bernadette; Gigmes, Didier; Zhang, Yijun; Sun, Ke; Morlet-Savary, Fabrice; Xiao, Pu; Dumur, Frederic; Lalevee, Jacques Bis-chalcone derivatives derived from natural products as near-UV/visible light sensitive photoinitiators for 3D/4D printing Article de journal Materials Chemistry Frontiers, 5 (2), p. 901–916, 2021. @article{Chen2021a, title = {Bis-chalcone derivatives derived from natural products as near-UV/visible light sensitive photoinitiators for 3D/4D printing}, author = {Hong Chen and Guillaume Noirbent and Shaohui Liu and Damien Brunel and Bernadette Graff and Didier Gigmes and Yijun Zhang and Ke Sun and Fabrice Morlet-Savary and Pu Xiao and Frederic Dumur and Jacques Lalevee}, doi = {10.1039/d0qm00755b}, year = {2021}, date = {2021-01-01}, journal = {Materials Chemistry Frontiers}, volume = {5}, number = {2}, pages = {901--916}, abstract = {Four series of bis-chalcone compounds based on benzylpiperidinone, tetrahydrothiopyranone, pyridine or biphenyl central parts are designed and synthesized, enabling the development of ten bis-chalcones varying both by the central cores and by the substitution patterns (ortho, meta, para-positions) and the choice of the different groups attached to the peripheral substituents (alkoxy or allyloxy-substituted aromatic rings, thiophene, or ferrocene). In this series of ten bis-chalcones, eight of them were never synthesized before (i.e. only bis-chalcones 8 and 10 were already reported albeit never used as photoinitiators). These different dyes are proposed as new near-UV/visible light sensitive photoinitiators, in combination with an amine and an iodonium salt, to initiate the free radical photopolymerization (FRP) of PEG-diacrylate and the cationic photopolymerization (CP) of EPOX under LED@405 nm and LED@375 nm irradiation conditions. For the photopolymerization of acrylates carried out between thin films in laminate, all the bis-chalcones proposed in this work show higher photoinitiation abilities upon irradiation with a LED at 375 nm than at 405 nm, which is mainly due to their excellent light absorption properties in the near-UV region. Markedly, in contrast with the other two series of bis-chalcone compounds, pyridine-based bis-chalcones prove to be the most efficient photoinitiators, especially the bis-chalcones 5 and 9. Furthermore, all of them can also promote the cationic polymerization of epoxides upon LED irradiation at 375 nm, in the presence of an iodonium salt and an amine. More interestingly, some 3D patterns fabricated through the free radical polymerization of PEG-diacrylate demonstrate reversible swelling properties and shape-memory for access to 4D printing.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Four series of bis-chalcone compounds based on benzylpiperidinone, tetrahydrothiopyranone, pyridine or biphenyl central parts are designed and synthesized, enabling the development of ten bis-chalcones varying both by the central cores and by the substitution patterns (ortho, meta, para-positions) and the choice of the different groups attached to the peripheral substituents (alkoxy or allyloxy-substituted aromatic rings, thiophene, or ferrocene). In this series of ten bis-chalcones, eight of them were never synthesized before (i.e. only bis-chalcones 8 and 10 were already reported albeit never used as photoinitiators). These different dyes are proposed as new near-UV/visible light sensitive photoinitiators, in combination with an amine and an iodonium salt, to initiate the free radical photopolymerization (FRP) of PEG-diacrylate and the cationic photopolymerization (CP) of EPOX under LED@405 nm and LED@375 nm irradiation conditions. For the photopolymerization of acrylates carried out between thin films in laminate, all the bis-chalcones proposed in this work show higher photoinitiation abilities upon irradiation with a LED at 375 nm than at 405 nm, which is mainly due to their excellent light absorption properties in the near-UV region. Markedly, in contrast with the other two series of bis-chalcone compounds, pyridine-based bis-chalcones prove to be the most efficient photoinitiators, especially the bis-chalcones 5 and 9. Furthermore, all of them can also promote the cationic polymerization of epoxides upon LED irradiation at 375 nm, in the presence of an iodonium salt and an amine. More interestingly, some 3D patterns fabricated through the free radical polymerization of PEG-diacrylate demonstrate reversible swelling properties and shape-memory for access to 4D printing. |
Beda, Adrian; Rabuel, Francois; Morcrette, Mathieu; Knopf, Stephan; Taberna, Pierre-Louis; Simon, Patrice; Ghimbeu, Camelia Matei Hard carbon key properties allow for the achievement of high Coulombic efficiency and high volumetric capacity in Na-ion batteries Article de journal Journal of Materials Chemistry A, 9 (3), p. 1743–1758, 2021. @article{Beda2021a, title = {Hard carbon key properties allow for the achievement of high Coulombic efficiency and high volumetric capacity in Na-ion batteries}, author = {Adrian Beda and Francois Rabuel and Mathieu Morcrette and Stephan Knopf and Pierre-Louis Taberna and Patrice Simon and Camelia Matei Ghimbeu}, doi = {10.1039/d0ta07687b}, year = {2021}, date = {2021-01-01}, journal = {Journal of Materials Chemistry A}, volume = {9}, number = {3}, pages = {1743--1758}, abstract = {The volumetric capacity and the initial Coulombic efficiency are features of major importance when it comes to the development of full-cell batteries, and are thus key characteristics to boost Na-ion batteries (NIBs) commercialization. To allow the improvement of these parameters, several hard carbon properties that are rarely addressed, such as tapped density and electrode porosity after calendaring, were investigated herein in relation with their physico-chemical characteristics and electrochemical performance. A series of sustainable and scalable synthesized hard carbon spheres with controlled properties were used in this purpose. It was found that the electrode porosity after calendaring decreases rather linearly with the graphite interlayer space (d(002)), the lowest value (41%) being reached for high temperature treated carbons (>1500 degrees C). No clear correlation could be established between the electrode porosity and the tapped density. This could be understood by the dependence of the tapped density on several interplaying parameters, including the porosity (open, closed and inter-grain) and the morphology (particle shape and size). The compact carbon electrodes could deliver a high volumetric capacity of similar to 300 mA h cm(-3). Such performance was achieved by combining low electrode porosity, low interlayer space, and low specific surface area as emphasized by comparison with several other labmade and commercial hard carbons. Moreover, these carbon spheres revealed an initial Coulombic efficiency of 92%, which is among the highest value reported for hard carbon. This could be correlated in large extent with the low values of the specific surface area of ultra-micropores (<0.7 nm), and further to the low amount of active sites and oxygen-containing functional groups. Several valuable propertyperformance correlations could be established, allowing for predicting the behavior of hard carbons in the Na-ion half-cells and full-cells.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The volumetric capacity and the initial Coulombic efficiency are features of major importance when it comes to the development of full-cell batteries, and are thus key characteristics to boost Na-ion batteries (NIBs) commercialization. To allow the improvement of these parameters, several hard carbon properties that are rarely addressed, such as tapped density and electrode porosity after calendaring, were investigated herein in relation with their physico-chemical characteristics and electrochemical performance. A series of sustainable and scalable synthesized hard carbon spheres with controlled properties were used in this purpose. It was found that the electrode porosity after calendaring decreases rather linearly with the graphite interlayer space (d(002)), the lowest value (41%) being reached for high temperature treated carbons (>1500 degrees C). No clear correlation could be established between the electrode porosity and the tapped density. This could be understood by the dependence of the tapped density on several interplaying parameters, including the porosity (open, closed and inter-grain) and the morphology (particle shape and size). The compact carbon electrodes could deliver a high volumetric capacity of similar to 300 mA h cm(-3). Such performance was achieved by combining low electrode porosity, low interlayer space, and low specific surface area as emphasized by comparison with several other labmade and commercial hard carbons. Moreover, these carbon spheres revealed an initial Coulombic efficiency of 92%, which is among the highest value reported for hard carbon. This could be correlated in large extent with the low values of the specific surface area of ultra-micropores (<0.7 nm), and further to the low amount of active sites and oxygen-containing functional groups. Several valuable propertyperformance correlations could be established, allowing for predicting the behavior of hard carbons in the Na-ion half-cells and full-cells. |
Caron, Aurore; Noirbent, Guillaume; Gigmes, Didier; Dumur, Frederic; Lalevee, Jacques Near-Infrared PhotoInitiating Systems: Photothermal versus Triplet-Triplet Annihilation-Based Upconversion Polymerization Article de journal Macromolecular Rapid Communications, p. 2100047, 2021. @article{Caron2021, title = {Near-Infrared PhotoInitiating Systems: Photothermal versus Triplet-Triplet Annihilation-Based Upconversion Polymerization}, author = {Aurore Caron and Guillaume Noirbent and Didier Gigmes and Frederic Dumur and Jacques Lalevee}, doi = {10.1002/marc.202100047}, year = {2021}, date = {2021-01-01}, journal = {Macromolecular Rapid Communications}, pages = {2100047}, abstract = {NIR light-induced polymerization has attracted more and more attention in the photopolymerization field due to the possibility to use safer and more penetrating wavelengths, reducing the hazardousness. Here, a novel perspective for the free radical polymerization of acrylate-based monomers based on triplet-triplet annihilation upconversion (TTA-UC) is proposed, avoiding the introduction of heavy metals, usually required in the TTA processes. Thermal imaging experiments and Fourier transform infrared spectroscopy are respectively used to record the temperature during NIR irradiation and measure the reactive function conversion. The competition between the TTA-UC and the NIR photothermal activation is investigated to compare the relative efficiency of both NIR processes. In view of the results obtained by the different methods, the photothermal effect seems to get the upper hand over the photoactivation of the system.}, keywords = {}, pubstate = {published}, tppubtype = {article} } NIR light-induced polymerization has attracted more and more attention in the photopolymerization field due to the possibility to use safer and more penetrating wavelengths, reducing the hazardousness. Here, a novel perspective for the free radical polymerization of acrylate-based monomers based on triplet-triplet annihilation upconversion (TTA-UC) is proposed, avoiding the introduction of heavy metals, usually required in the TTA processes. Thermal imaging experiments and Fourier transform infrared spectroscopy are respectively used to record the temperature during NIR irradiation and measure the reactive function conversion. The competition between the TTA-UC and the NIR photothermal activation is investigated to compare the relative efficiency of both NIR processes. In view of the results obtained by the different methods, the photothermal effect seems to get the upper hand over the photoactivation of the system. |
2021 |
Blin, Jean-Luc; Michelin, Laure; Lebeau, Benedicte; Naydenov, Anton; Velinova, Ralitsa; Kolev, Hristo; Gaudin, Pierrick; Vidal, Loic; Dotzeva, Anna; Tenchev, Krasimir; Todorova, Silviya Co-Ce Oxides Supported on SBA-15 for VOCs Oxidation (Article de journal) Catalysts, 11 (3), p. 366, 2021. @article{Blin2021, title = {Co-Ce Oxides Supported on SBA-15 for VOCs Oxidation}, author = {Jean-Luc Blin and Laure Michelin and Benedicte Lebeau and Anton Naydenov and Ralitsa Velinova and Hristo Kolev and Pierrick Gaudin and Loic Vidal and Anna Dotzeva and Krasimir Tenchev and Silviya Todorova}, doi = {10.3390/catal11030366}, year = {2021}, date = {2021-03-01}, journal = {Catalysts}, volume = {11}, number = {3}, pages = {366}, abstract = {Reported here are new data on the structural and catalytic properties of a series of mono-component cobalt and bi-component Co-Ce catalysts supported on SBA-15 (Santa Barbara Amorphous-15)). The catalysts performance has been evaluated by tests on combustion of methane, propane, and n-hexane. It was established that the preparation of the Co-Ce catalysts by the 'two-solvent' technique does not significantly change the mesoporous structure, however, its pores are clogging with the Co and Ce guest species. Cobalt and cerium are uniformly distributed and preferentially fill up the channels of SBA-15, but oxide agglomerates located on the surface are observed as well. The highest activity of the mono-component cobalt sample is explained by its higher reducibility as a result of lower interaction of the cobalt oxide with the SBA-15. The fine dispersion of cobalt and cerium oxide and their strong interaction in the channels of the SBA-15 molecular sieve, leads to the formation of difficult-to-reduce oxide phases and, consequently, to lower catalytic activity compared to monocomponent cobalt oxide catalyst. The synthesised mesoporous structure can prevent the agglomeration of the oxide particles, thus leading to the successful development of a new and stable catalyst for decreasing greenhouse gas emissions.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Reported here are new data on the structural and catalytic properties of a series of mono-component cobalt and bi-component Co-Ce catalysts supported on SBA-15 (Santa Barbara Amorphous-15)). The catalysts performance has been evaluated by tests on combustion of methane, propane, and n-hexane. It was established that the preparation of the Co-Ce catalysts by the 'two-solvent' technique does not significantly change the mesoporous structure, however, its pores are clogging with the Co and Ce guest species. Cobalt and cerium are uniformly distributed and preferentially fill up the channels of SBA-15, but oxide agglomerates located on the surface are observed as well. The highest activity of the mono-component cobalt sample is explained by its higher reducibility as a result of lower interaction of the cobalt oxide with the SBA-15. The fine dispersion of cobalt and cerium oxide and their strong interaction in the channels of the SBA-15 molecular sieve, leads to the formation of difficult-to-reduce oxide phases and, consequently, to lower catalytic activity compared to monocomponent cobalt oxide catalyst. The synthesised mesoporous structure can prevent the agglomeration of the oxide particles, thus leading to the successful development of a new and stable catalyst for decreasing greenhouse gas emissions. |
Ors, Taylan; Gouraud, Fanny; Michel, Vincent; Huger, Marc; Gey, Nathalie; Micha, Jean-Sebastien; Castelnau, Olivier; Guinebretiere, Rene Huge local elastic strains in bulk nanostructured pure zirconia materials (Article de journal) Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 806 , p. 140817, 2021. @article{Ors2021, title = {Huge local elastic strains in bulk nanostructured pure zirconia materials}, author = {Taylan Ors and Fanny Gouraud and Vincent Michel and Marc Huger and Nathalie Gey and Jean-Sebastien Micha and Olivier Castelnau and Rene Guinebretiere}, doi = {10.1016/j.msea.2021.140817}, year = {2021}, date = {2021-03-01}, journal = {Materials Science and Engineering A-structural Materials Properties Microstructure and Processing}, volume = {806}, pages = {140817}, abstract = {From the liquid state to room temperature, two successive solid-state phase transitions occur in pure zirconia. It is well-known that the last one (tetragonal to monoclinic) is martensitic and induces large volume variations and shear strains. Elastic and inelastic behaviors of zirconia-based materials are strongly influenced by this transition and the associated strain fields that it induces. Knowledge of strain and stress at the crystal scale is thus a crucial point. Using fully dense pure zirconia polycrystals obtained by a fuse casting process, we have determined at a sub-micrometric scale, by X-ray Laue microdiffraction, the strains map at room temperature in as-cast specimens and after a post elaboration high temperature thermal treatment. We observed that the fluctuation of deviatoric elastic strain is huge, the standard deviation of normal component being in the range of 1-2%. The heat treatment tends to even further increase this range of fluctuation, despite the development of a multiscale crack network formed during the cooling. Correspondingly, the associated stress level is also huge. It lies in the 5 GPa range with stress gradient amounting 1 GPa mu m(-1).}, keywords = {}, pubstate = {published}, tppubtype = {article} } From the liquid state to room temperature, two successive solid-state phase transitions occur in pure zirconia. It is well-known that the last one (tetragonal to monoclinic) is martensitic and induces large volume variations and shear strains. Elastic and inelastic behaviors of zirconia-based materials are strongly influenced by this transition and the associated strain fields that it induces. Knowledge of strain and stress at the crystal scale is thus a crucial point. Using fully dense pure zirconia polycrystals obtained by a fuse casting process, we have determined at a sub-micrometric scale, by X-ray Laue microdiffraction, the strains map at room temperature in as-cast specimens and after a post elaboration high temperature thermal treatment. We observed that the fluctuation of deviatoric elastic strain is huge, the standard deviation of normal component being in the range of 1-2%. The heat treatment tends to even further increase this range of fluctuation, despite the development of a multiscale crack network formed during the cooling. Correspondingly, the associated stress level is also huge. It lies in the 5 GPa range with stress gradient amounting 1 GPa mu m(-1). |
Subervie, Daniel; Quemener, Frederic Le; Canterel, Remi; Dugas, Pierre-Yves; Boyron, Olivier; Lalevee, Jacques; Bourgeat-Lami, Elodie; Lansalot, Muriel; Lacote, Emmanuel Visible-Light Emulsion Photopolymerization of Acrylates and Methacrylates: Mechanistic Insights and Introduction of a Simplified Sulfur-Based Photoinitiating System (Article de journal) Macromolecules, 54 (5), p. 2124–2133, 2021. @article{Subervie2021, title = {Visible-Light Emulsion Photopolymerization of Acrylates and Methacrylates: Mechanistic Insights and Introduction of a Simplified Sulfur-Based Photoinitiating System}, author = {Daniel Subervie and Frederic Le Quemener and Remi Canterel and Pierre-Yves Dugas and Olivier Boyron and Jacques Lalevee and Elodie Bourgeat-Lami and Muriel Lansalot and Emmanuel Lacote}, doi = {10.1021/acs.macromol.0c01692}, year = {2021}, date = {2021-03-01}, journal = {Macromolecules}, volume = {54}, number = {5}, pages = {2124--2133}, abstract = {The emulsion photopolymerization under visible light of acrylate and methacrylate monomers is reported. We previously introduced an NHC-borane-based system that was efficient for the emulsion photopolymerization of styrene [acridine orange (AO)/disulfide/NHC-borane]. This system relies on the disulfide photoreduction from the excited AO, followed by H-atom abstraction from the NHC-borane by the thiyl radical generated from the disulfide, eventually forming initiating NHC-boryl radicals. For the photopolymerization of (meth)acrylates, the boron-based photoinitiating system was simplified; as under LED illumination, the water-soluble disulfide alone is able to generate thiyl radicals that could initiate the polymerizations. With this disulfide/blue light system, MMA efficiently polymerized in emulsion, with solid contents up to 40%. The simplified system led to smaller particles than the full photoinitiating boron-based system, but the latter gave slightly better particle size distributions. Compared to styrene, the particle sizes attained for MMA were generally smaller. The disulfide photoinitiator gives access to a wide range of poly(meth)acrylic latexes, but it does not initiate the photopolymerization of styrene. We suggest that the propagation rate prevails on monomer solubility in the case of (meth)acrylates, which explains the efficiency of the photopolymerization with a much weaker initiating system. The method can also lead to the production of random copolymer latexes, such as P(MMA-co-St) and the film-forming P(MMA-co-BA). The fact that the disulfide is able to lead to the former further supports the predominant role of the propagation rate on the polymerization. Finally, the polymerization allows for temporal control. It proceeds under light and stops in the dark.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The emulsion photopolymerization under visible light of acrylate and methacrylate monomers is reported. We previously introduced an NHC-borane-based system that was efficient for the emulsion photopolymerization of styrene [acridine orange (AO)/disulfide/NHC-borane]. This system relies on the disulfide photoreduction from the excited AO, followed by H-atom abstraction from the NHC-borane by the thiyl radical generated from the disulfide, eventually forming initiating NHC-boryl radicals. For the photopolymerization of (meth)acrylates, the boron-based photoinitiating system was simplified; as under LED illumination, the water-soluble disulfide alone is able to generate thiyl radicals that could initiate the polymerizations. With this disulfide/blue light system, MMA efficiently polymerized in emulsion, with solid contents up to 40%. The simplified system led to smaller particles than the full photoinitiating boron-based system, but the latter gave slightly better particle size distributions. Compared to styrene, the particle sizes attained for MMA were generally smaller. The disulfide photoinitiator gives access to a wide range of poly(meth)acrylic latexes, but it does not initiate the photopolymerization of styrene. We suggest that the propagation rate prevails on monomer solubility in the case of (meth)acrylates, which explains the efficiency of the photopolymerization with a much weaker initiating system. The method can also lead to the production of random copolymer latexes, such as P(MMA-co-St) and the film-forming P(MMA-co-BA). The fact that the disulfide is able to lead to the former further supports the predominant role of the propagation rate on the polymerization. Finally, the polymerization allows for temporal control. It proceeds under light and stops in the dark. |
Yatsui, Takashi; Brandenburg, Felix; Leuschel, Benjamin; Soppera, Olivier Synthesis of silver nanostructure on gold nanoparticle using near field assisted second harmonic generation. (Article de journal) Scientific reports, 11 (1), p. 5642–5642, 2021. @article{Yatsui2021, title = {Synthesis of silver nanostructure on gold nanoparticle using near field assisted second harmonic generation.}, author = {Takashi Yatsui and Felix Brandenburg and Benjamin Leuschel and Olivier Soppera}, doi = {10.1038/s41598-021-84944-w}, year = {2021}, date = {2021-03-01}, journal = {Scientific reports}, volume = {11}, number = {1}, pages = {5642--5642}, abstract = {By using gold (Au) nanoparticles (NPs) as an optical near-field source under far-field illumination in combination with a silver (Ag) ion solution containing a photoinitiator, we coated Ag on Au NPs using a near-field (NF)-assisted process. We evaluated the change in the size of the NPs using transmission electron microscopy. Evaluation of the synthesized Ag volume over illumination power confirmed the squared power dependence of the NP volume with illumination using 808nm light, i.e., a wavelength longer than the absorption edge wavelength of the photoinitiator molecules. The rate of volume increase was much lower than the plasmonic field enhancement effect. Therefore, the squared power dependency of the volume increase using a wavelength longer than the absorption edge wavelength originated from NF-assisted second-harmonic generation and the resulting excitation.}, keywords = {}, pubstate = {published}, tppubtype = {article} } By using gold (Au) nanoparticles (NPs) as an optical near-field source under far-field illumination in combination with a silver (Ag) ion solution containing a photoinitiator, we coated Ag on Au NPs using a near-field (NF)-assisted process. We evaluated the change in the size of the NPs using transmission electron microscopy. Evaluation of the synthesized Ag volume over illumination power confirmed the squared power dependence of the NP volume with illumination using 808nm light, i.e., a wavelength longer than the absorption edge wavelength of the photoinitiator molecules. The rate of volume increase was much lower than the plasmonic field enhancement effect. Therefore, the squared power dependency of the volume increase using a wavelength longer than the absorption edge wavelength originated from NF-assisted second-harmonic generation and the resulting excitation. |
Mouafo, Louis Donald Notemgnou; Godel, Florian; Simon, Laurent; Dappe, Yannick J; Baaziz, Walid; Noumbe, Ulrich Nguetchuissi; Lorchat, Etienne; Martin, Marie-Blandine; Berciaud, Stephane; Doudin, Bernard; Ersen, Ovidiu; Dlubak, Bruno; Seneor, Pierre; Dayen, Jean-Francois 0D/2D Heterostructures Vertical Single Electron Transistor (Article de journal) Advanced Functional Materials, 31 (9), p. 2008255, 2021. @article{Mouafo2021, title = {0D/2D Heterostructures Vertical Single Electron Transistor}, author = {Louis Donald Notemgnou Mouafo and Florian Godel and Laurent Simon and Yannick J Dappe and Walid Baaziz and Ulrich Nguetchuissi Noumbe and Etienne Lorchat and Marie-Blandine Martin and Stephane Berciaud and Bernard Doudin and Ovidiu Ersen and Bruno Dlubak and Pierre Seneor and Jean-Francois Dayen}, doi = {10.1002/adfm.202008255}, year = {2021}, date = {2021-02-01}, journal = {Advanced Functional Materials}, volume = {31}, number = {9}, pages = {2008255}, abstract = {Mixed-dimensional heterostructures formed by the stacking of 2D materials with nanostructures of distinct dimensionality constitute a new class of nanomaterials that offers multifunctionality that goes beyond those of single dimensional systems. An unexplored architecture of single electron transistor (SET) is developed that employs heterostructures made of nanoclusters (0D) grown on a 2D molybdenum disulfide (MoS2) channel. Combining the large Coulomb energy of the nanoclusters with the electronic capabilities of the 2D layer, the concept of 0D-2D vertical SET is unveiled. The MoS2 underneath serves both as a charge tunable channel interconnecting the electrode, and as bottom electrode for each v-SET cell. In addition, its atomic thickness makes it thinner than the Debye screening length, providing electric field transparency functionality that allows for an efficient electric back gate control of the nanoclusters charge state. The Coulomb diamond pattern characteristics of SET are reported, with specific doping dependent nonlinear features arising from the 0D/2D geometry that are elucidated by theoretical modeling. These results hold promise for multifunctional single electron device taking advantage of the versatility of the 2D materials library, with as example envisioned spintronics applications while coupling quantum dots to magnetic 2D material, or to ferroelectric layers for neuromorphic devices.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Mixed-dimensional heterostructures formed by the stacking of 2D materials with nanostructures of distinct dimensionality constitute a new class of nanomaterials that offers multifunctionality that goes beyond those of single dimensional systems. An unexplored architecture of single electron transistor (SET) is developed that employs heterostructures made of nanoclusters (0D) grown on a 2D molybdenum disulfide (MoS2) channel. Combining the large Coulomb energy of the nanoclusters with the electronic capabilities of the 2D layer, the concept of 0D-2D vertical SET is unveiled. The MoS2 underneath serves both as a charge tunable channel interconnecting the electrode, and as bottom electrode for each v-SET cell. In addition, its atomic thickness makes it thinner than the Debye screening length, providing electric field transparency functionality that allows for an efficient electric back gate control of the nanoclusters charge state. The Coulomb diamond pattern characteristics of SET are reported, with specific doping dependent nonlinear features arising from the 0D/2D geometry that are elucidated by theoretical modeling. These results hold promise for multifunctional single electron device taking advantage of the versatility of the 2D materials library, with as example envisioned spintronics applications while coupling quantum dots to magnetic 2D material, or to ferroelectric layers for neuromorphic devices. |
Jeguirim, Mejdi; Jellali, Salah Wastewater Treatment, Valorization, and Reuse (Article de journal) Water, 13 (4), p. 548, 2021. @article{Jeguirim2021, title = {Wastewater Treatment, Valorization, and Reuse}, author = {Mejdi Jeguirim and Salah Jellali}, doi = {10.3390/w13040548}, year = {2021}, date = {2021-02-01}, journal = {Water}, volume = {13}, number = {4}, pages = {548}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Rougerie, Pablo; dos Santos, Rafaela Silva; Farina, Marcos; Anselme, Karine Molecular Mechanisms of Topography Sensing by Osteoblasts: An Update (Article de journal) Applied Sciences-basel, 11 (4), p. 1791, 2021. @article{Rougerie2021, title = {Molecular Mechanisms of Topography Sensing by Osteoblasts: An Update}, author = {Pablo Rougerie and Rafaela Silva dos Santos and Marcos Farina and Karine Anselme}, doi = {10.3390/app11041791}, year = {2021}, date = {2021-02-01}, journal = {Applied Sciences-basel}, volume = {11}, number = {4}, pages = {1791}, abstract = {Featured Application The evaluation of the behavior of cultured cells on substrates with controlled topographies can contribute significantly to the optimization of biomaterials for bioengineering, due to the fact that cells are able to recognize topographies at different length scales and can be influenced by them. This review aims to bring together studies in the field that identify important molecular factors involved in this mechanism. In the case of osteoblasts, specific surface topographies of biomaterials used as bone grafts could lead to a fast recovery of bone defects associated with expected tissue homeostasis. In this review we have brought up the present knowledge on the interaction of osteoblasts with different substrates and we expect that its content can help in the future design of the next generation of materials for bone engineering. Bone is a specialized tissue formed by different cell types and a multiscale, complex mineralized matrix. The architecture and the surface chemistry of this microenvironment can be factors of considerable influence on cell biology, and can affect cell proliferation, commitment to differentiation, gene expression, matrix production and/or composition. It has been shown that osteoblasts encounter natural motifs in vivo, with various topographies (shapes, sizes, organization), and that cell cultures on flat surfaces do not reflect the total potential of the tissue. Therefore, studies investigating the role of topographies on cell behavior are important in order to better understand the interaction between cells and surfaces, to improve osseointegration processes in vivo between tissues and biomaterials, and to find a better topographic surface to enhance bone repair. In this review, we evaluate the main available data about surface topographies, techniques for topographies' production, mechanical signal transduction from surfaces to cells and the impact of cell-surface interactions on osteoblasts or preosteoblasts' behavior.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Featured Application The evaluation of the behavior of cultured cells on substrates with controlled topographies can contribute significantly to the optimization of biomaterials for bioengineering, due to the fact that cells are able to recognize topographies at different length scales and can be influenced by them. This review aims to bring together studies in the field that identify important molecular factors involved in this mechanism. In the case of osteoblasts, specific surface topographies of biomaterials used as bone grafts could lead to a fast recovery of bone defects associated with expected tissue homeostasis. In this review we have brought up the present knowledge on the interaction of osteoblasts with different substrates and we expect that its content can help in the future design of the next generation of materials for bone engineering. Bone is a specialized tissue formed by different cell types and a multiscale, complex mineralized matrix. The architecture and the surface chemistry of this microenvironment can be factors of considerable influence on cell biology, and can affect cell proliferation, commitment to differentiation, gene expression, matrix production and/or composition. It has been shown that osteoblasts encounter natural motifs in vivo, with various topographies (shapes, sizes, organization), and that cell cultures on flat surfaces do not reflect the total potential of the tissue. Therefore, studies investigating the role of topographies on cell behavior are important in order to better understand the interaction between cells and surfaces, to improve osseointegration processes in vivo between tissues and biomaterials, and to find a better topographic surface to enhance bone repair. In this review, we evaluate the main available data about surface topographies, techniques for topographies' production, mechanical signal transduction from surfaces to cells and the impact of cell-surface interactions on osteoblasts or preosteoblasts' behavior. |
Anfar, Zakaria; Fakir, Abdellah Ait El; Zbair, Mohamed; Hafidi, Zakaria; Amedlous, Abdallah; Majdoub, Mohammed; Farsad, Salaheddine; Amjlef, Asma; Jada, Amane; Alem, Noureddine El Chemical Engineering Journal, 405 , p. 126660, 2021. @article{Anfar2021, title = {New functionalization approach synthesis of Sulfur doped, Nitrogen doped and Co-doped porous carbon: Superior metal-free Carbocatalyst for the catalytic oxidation of aqueous organics pollutants}, author = {Zakaria Anfar and Abdellah Ait El Fakir and Mohamed Zbair and Zakaria Hafidi and Abdallah Amedlous and Mohammed Majdoub and Salaheddine Farsad and Asma Amjlef and Amane Jada and Noureddine El Alem}, doi = {10.1016/j.cej.2020.126660}, year = {2021}, date = {2021-02-01}, journal = {Chemical Engineering Journal}, volume = {405}, pages = {126660}, abstract = {New green synthesis methods of novel commercially applicable carbocatalysts suitable for the catalytic oxidation of organic pollutants, remain a challenge. Herein, Nitrogen doped (N-PC), Sulfur doped (S-PC) and Co-doped (N, S-PC) porous carbon, were synthesized via a new facile environmentally functionalization approach followed by pyrolysis. Thus, Almond Shell (AS) as Bio-sourced material was used for porous carbon (PC) preparation as support. Thereafter, the introduction of Melamine, Diphenyl Disulfide and Thiourea on the PC matrix with high-COCl- and -CCl- groups facilitated the surface functionalization, and allowed us the introduction of high N and S heteroatoms contents in the PC networks surface. It was found that the optimized carbocatalysts could effectively activate PS, and exhibited excellent catalytic performances for the organic pollutants degradation, with an exceptionally low activation energy and fast kinetic reaction. Based on a systematic comparison, it was found that the N-PC exhibited the superior catalytic activity for activating the PS and degrading various organic pollutants. Such superior catalytic activity of the N-PC Carbocatalyst resulted from its high surface area, its low defect degree with the higher content of Graphitic-N. In addition, all experimental and theoretical investigations demonstrated the critical role of graphitic-N for the PS activation. It is expected that the doping process by N will significantly break the chemical inertness of the PC network and will make the N-PC surface more positively charged accelerating hence its interaction with the negatively charged S2O82-. Furthermore, the O-1(2) was found to be the predominant reactive oxygen species (ROS) as assessed by radical scavenging tests and EPR experi-ments. The carbocatalysts were not easily influenced by the water aqueous phase, which give us more obvious advantages over the PS activation.}, keywords = {}, pubstate = {published}, tppubtype = {article} } New green synthesis methods of novel commercially applicable carbocatalysts suitable for the catalytic oxidation of organic pollutants, remain a challenge. Herein, Nitrogen doped (N-PC), Sulfur doped (S-PC) and Co-doped (N, S-PC) porous carbon, were synthesized via a new facile environmentally functionalization approach followed by pyrolysis. Thus, Almond Shell (AS) as Bio-sourced material was used for porous carbon (PC) preparation as support. Thereafter, the introduction of Melamine, Diphenyl Disulfide and Thiourea on the PC matrix with high-COCl- and -CCl- groups facilitated the surface functionalization, and allowed us the introduction of high N and S heteroatoms contents in the PC networks surface. It was found that the optimized carbocatalysts could effectively activate PS, and exhibited excellent catalytic performances for the organic pollutants degradation, with an exceptionally low activation energy and fast kinetic reaction. Based on a systematic comparison, it was found that the N-PC exhibited the superior catalytic activity for activating the PS and degrading various organic pollutants. Such superior catalytic activity of the N-PC Carbocatalyst resulted from its high surface area, its low defect degree with the higher content of Graphitic-N. In addition, all experimental and theoretical investigations demonstrated the critical role of graphitic-N for the PS activation. It is expected that the doping process by N will significantly break the chemical inertness of the PC network and will make the N-PC surface more positively charged accelerating hence its interaction with the negatively charged S2O82-. Furthermore, the O-1(2) was found to be the predominant reactive oxygen species (ROS) as assessed by radical scavenging tests and EPR experi-ments. The carbocatalysts were not easily influenced by the water aqueous phase, which give us more obvious advantages over the PS activation. |
Liu, Shaohui; Brunel, Damien; Noirbent, Guillaume; Mau, Alexandre; Chen, Hong; Morlet-Savary, Fabrice; Graff, Bernadette; Gigmes, Didier; Xiao, Pu; Dumur, Frederic; Lalevee, Jacques New multifunctional benzophenone-based photoinitiators with high migration stability and their applications in 3D printing (Article de journal) Materials Chemistry Frontiers, 5 (4), p. 1982–1994, 2021. @article{Liu2021, title = {New multifunctional benzophenone-based photoinitiators with high migration stability and their applications in 3D printing}, author = {Shaohui Liu and Damien Brunel and Guillaume Noirbent and Alexandre Mau and Hong Chen and Fabrice Morlet-Savary and Bernadette Graff and Didier Gigmes and Pu Xiao and Frederic Dumur and Jacques Lalevee}, doi = {10.1039/d0qm00885k}, year = {2021}, date = {2021-02-01}, journal = {Materials Chemistry Frontiers}, volume = {5}, number = {4}, pages = {1982--1994}, abstract = {In this paper, seven new photoinitiators based on the benzophenone scaffold are specifically designed for photopolymerization under mild conditions upon light-emitting diode (LED) irradiation, i.e. four benzophenone-triphenylamine photoinitiators (denoted as BT1-BT4) and three benzophenone-carbazole photoinitiators (denoted as BC1-BC3). Noticeably, these structures have never been reported in the literature except for BT4, so these molecules have been specifically designed for photopolymerization applications. Remarkably, various combinations of chemical groups were investigated in this work to determine the effects of the substitution patterns on their photoinitiation abilities. The formation of benzophenone-triphenylamine and benzophenone-carbazole hybrid structures not only contributes to red-shift of the absorption maxima but also strongly enhances their molar extinction coefficients. The different compounds showed high photoinitiation abilities upon irradiation with an LED@405 nm, and the free radical photopolymerization of acrylates and the cationic polymerization of epoxides could be promoted with high final function conversions (e.g. 77% for the BT3/iodonium salt/amine system in free radical photopolymerization). Remarkably, these new PIs are also able to sensitize sulfonium salts upon irradiation @405 nm. Markedly, because of the benzophenone moiety, a monocomponent Type II PI behavior could be observed, e.g. these compounds could initiate the polymerization alone. Remarkably, benzophenone-triphenylamine compounds BT2, BT3 and BT4 exhibited better hydrogen abstraction abilities as Type II photoinitiators than the benchmark and commercial photoinitiator 2-isopropylthioxanthone in the absence of amines as well as in the presence of amines. Furthermore, the interaction between the photoinitiators and the different additives was investigated by steady state photolysis and fluorescence quenching experiments. The free radical generation in the BT3/amine system was confirmed by the electron spin resonance-spin trapping technique, and the chemical mechanisms related to the polymerization efficiency are discussed. In addition, the migration stability of BT3 was investigated, which was excellent due to its high molecular weight and its trifunctional character. Finally, the three-component photoinitiating system based on BT3 was successfully applied in 3D printing and the 3D patterns showed a good spatial resolution.}, keywords = {}, pubstate = {published}, tppubtype = {article} } In this paper, seven new photoinitiators based on the benzophenone scaffold are specifically designed for photopolymerization under mild conditions upon light-emitting diode (LED) irradiation, i.e. four benzophenone-triphenylamine photoinitiators (denoted as BT1-BT4) and three benzophenone-carbazole photoinitiators (denoted as BC1-BC3). Noticeably, these structures have never been reported in the literature except for BT4, so these molecules have been specifically designed for photopolymerization applications. Remarkably, various combinations of chemical groups were investigated in this work to determine the effects of the substitution patterns on their photoinitiation abilities. The formation of benzophenone-triphenylamine and benzophenone-carbazole hybrid structures not only contributes to red-shift of the absorption maxima but also strongly enhances their molar extinction coefficients. The different compounds showed high photoinitiation abilities upon irradiation with an LED@405 nm, and the free radical photopolymerization of acrylates and the cationic polymerization of epoxides could be promoted with high final function conversions (e.g. 77% for the BT3/iodonium salt/amine system in free radical photopolymerization). Remarkably, these new PIs are also able to sensitize sulfonium salts upon irradiation @405 nm. Markedly, because of the benzophenone moiety, a monocomponent Type II PI behavior could be observed, e.g. these compounds could initiate the polymerization alone. Remarkably, benzophenone-triphenylamine compounds BT2, BT3 and BT4 exhibited better hydrogen abstraction abilities as Type II photoinitiators than the benchmark and commercial photoinitiator 2-isopropylthioxanthone in the absence of amines as well as in the presence of amines. Furthermore, the interaction between the photoinitiators and the different additives was investigated by steady state photolysis and fluorescence quenching experiments. The free radical generation in the BT3/amine system was confirmed by the electron spin resonance-spin trapping technique, and the chemical mechanisms related to the polymerization efficiency are discussed. In addition, the migration stability of BT3 was investigated, which was excellent due to its high molecular weight and its trifunctional character. Finally, the three-component photoinitiating system based on BT3 was successfully applied in 3D printing and the 3D patterns showed a good spatial resolution. |
Rahal, Mahmoud; Mokbel, Haifaa; Graff, Bernadette; Pertici, Vincent; Gigmes, Didier; Toufaily, Joumana; Hamieh, Tayssir; Dumur, Frederic; Lalevee, Jacques Naphthalimide-Based Dyes as Photoinitiators under Visible Light Irradiation and their Applications: Photocomposite Synthesis, 3D printing and Polymerization in Water (Article de journal) Chemphotochem, 2021. @article{Rahal2021, title = {Naphthalimide-Based Dyes as Photoinitiators under Visible Light Irradiation and their Applications: Photocomposite Synthesis, 3D printing and Polymerization in Water}, author = {Mahmoud Rahal and Haifaa Mokbel and Bernadette Graff and Vincent Pertici and Didier Gigmes and Joumana Toufaily and Tayssir Hamieh and Frederic Dumur and Jacques Lalevee}, doi = {10.1002/cptc.202000306}, year = {2021}, date = {2021-02-01}, journal = {Chemphotochem}, publisher = {Wiley}, abstract = {In this work, six new fluorescent dyes derived from the naphthalimide scaffold (Napht1-Napht6) were synthesized and used as high-performance photoinitiating systems (PISs) in two and three-component systems (combined with iodonium salt (Iod) and/or an electron donor amine (such as N-phenylglycine[NPG])) for the radical photopolymerization of acrylate and methacrylate monomers under visible light using a light-emitting diode at 405 nm. Markedly, these dyes were never synthesized before. In fact, these PISs showed high initiation efficiency with both demonstrating high final reactive function conversions and high polymerization rates. A further interest of our study is to determine the effect of the different substituents (chromophoric group) on the naphthalimide function, concerning the efficiency of initiation of the free radical polymerization. In order to improve the mechanical properties of the obtained polymers, these derivatives were also tested for the photopolymerization of a blend of acrylate/epoxy monomers (TA/EPOX); these latter properties were characterized by traction tests. To demonstrate the initiation efficiency of these dyes, several methods and characterization techniques were used, including steady state photolysis, real-time Fourier transform infrared spectroscopy, emission spectroscopy as well as cyclic voltammetry. In our study, these naphthalimides were used for the synthesis of photocomposites (one and multiple layers of glass fibres) using a UV@395 nm (4 W/cm(2)) conveyor, as well as in the preparation of 3D printed polymers. Markedly, one of the naphthalimide derivatives (Napht-4) can be used as a new high-performance water soluble photoinitiator for photopolymerization in water and hydrogel synthesis.}, keywords = {}, pubstate = {published}, tppubtype = {article} } In this work, six new fluorescent dyes derived from the naphthalimide scaffold (Napht1-Napht6) were synthesized and used as high-performance photoinitiating systems (PISs) in two and three-component systems (combined with iodonium salt (Iod) and/or an electron donor amine (such as N-phenylglycine[NPG])) for the radical photopolymerization of acrylate and methacrylate monomers under visible light using a light-emitting diode at 405 nm. Markedly, these dyes were never synthesized before. In fact, these PISs showed high initiation efficiency with both demonstrating high final reactive function conversions and high polymerization rates. A further interest of our study is to determine the effect of the different substituents (chromophoric group) on the naphthalimide function, concerning the efficiency of initiation of the free radical polymerization. In order to improve the mechanical properties of the obtained polymers, these derivatives were also tested for the photopolymerization of a blend of acrylate/epoxy monomers (TA/EPOX); these latter properties were characterized by traction tests. To demonstrate the initiation efficiency of these dyes, several methods and characterization techniques were used, including steady state photolysis, real-time Fourier transform infrared spectroscopy, emission spectroscopy as well as cyclic voltammetry. In our study, these naphthalimides were used for the synthesis of photocomposites (one and multiple layers of glass fibres) using a UV@395 nm (4 W/cm(2)) conveyor, as well as in the preparation of 3D printed polymers. Markedly, one of the naphthalimide derivatives (Napht-4) can be used as a new high-performance water soluble photoinitiator for photopolymerization in water and hydrogel synthesis. |
Ma, Yik-Ken; Rigolet, Severinne; Michelin, Laure; Paillaud, Jean-Louis; Mintova, Svetlana; Khoerunnisa, Fitri; Daou, Jean T; Ng, Eng-Poh Facile and fast determination of Si/Al ratio of zeolites using FTIR spectroscopy technique (Article de journal) Microporous and Mesoporous Materials, 311 , p. 110683, 2021. @article{Ma2021, title = {Facile and fast determination of Si/Al ratio of zeolites using FTIR spectroscopy technique}, author = {Yik-Ken Ma and Severinne Rigolet and Laure Michelin and Jean-Louis Paillaud and Svetlana Mintova and Fitri Khoerunnisa and Jean T Daou and Eng-Poh Ng}, doi = {10.1016/j.micromeso.2020.110683}, year = {2021}, date = {2021-02-01}, journal = {Microporous and Mesoporous Materials}, volume = {311}, pages = {110683}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Xu, Yangyang; Noirbent, Guillaume; Brunel, Damien; Ding, Zhaofu; Gigmes, Didier; Graff, Bernadette; Xiao, Pu; Dumur, Frederic; Lalevee, Jacques Allyloxy ketones as efficient photoinitiators with high migration stability in free radical polymerization and 3D printing (Article de journal) Dyes and Pigments, 185 , p. 108900, 2021. @article{Xu2021, title = {Allyloxy ketones as efficient photoinitiators with high migration stability in free radical polymerization and 3D printing}, author = {Yangyang Xu and Guillaume Noirbent and Damien Brunel and Zhaofu Ding and Didier Gigmes and Bernadette Graff and Pu Xiao and Frederic Dumur and Jacques Lalevee}, doi = {10.1016/j.dyepig.2020.108900}, year = {2021}, date = {2021-02-01}, journal = {Dyes and Pigments}, volume = {185}, pages = {108900}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Zhang, Yijun; Xu, Yangyang; Simon-Masseron, Angelique; Lalevee, Jacques Radical photoinitiation with LEDs and applications in the 3D printing of composites. (Article de journal) Chemical Society reviews, 2021. @article{Zhang2021, title = {Radical photoinitiation with LEDs and applications in the 3D printing of composites.}, author = {Yijun Zhang and Yangyang Xu and Angelique Simon-Masseron and Jacques Lalevee}, doi = {10.1039/d0cs01411g}, year = {2021}, date = {2021-02-01}, journal = {Chemical Society reviews}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Revol, Baptiste Paul; Vauthier, Madeline; Thomassey, Matthieu; Bouquey, Michel; Ruch, Frederic; Nardin, Michel Design of experience to evaluate the Interfacial compatibility on high tenacity viscose fibers reinforced Polyamide-6 composites (Article de journal) Composites Science and Technology, 203 , p. 108615, 2021. @article{Revol2021, title = {Design of experience to evaluate the Interfacial compatibility on high tenacity viscose fibers reinforced Polyamide-6 composites}, author = {Baptiste Paul Revol and Madeline Vauthier and Matthieu Thomassey and Michel Bouquey and Frederic Ruch and Michel Nardin}, doi = {10.1016/j.compscitech.2020.108615}, year = {2021}, date = {2021-02-01}, journal = {Composites Science and Technology}, volume = {203}, pages = {108615}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Gaca, Magdalena; Ilcikova, Marketa; Mrlik, Miroslav; Cvek, Martin; Vaulot, Cyril; Urbanek, Pavel; Pietrasik, Robert; Krupa, Igor; Pietrasik, Joanna Impact of ionic liquids on the processing and photo-actuation behavior of SBR composites containing graphene nanoplatelets (Article de journal) Sensors and Actuators B-chemical, 329 , p. 129195, 2021. @article{Gaca2021, title = {Impact of ionic liquids on the processing and photo-actuation behavior of SBR composites containing graphene nanoplatelets}, author = {Magdalena Gaca and Marketa Ilcikova and Miroslav Mrlik and Martin Cvek and Cyril Vaulot and Pavel Urbanek and Robert Pietrasik and Igor Krupa and Joanna Pietrasik}, doi = {10.1016/j.snb.2020.129195}, year = {2021}, date = {2021-02-01}, journal = {Sensors and Actuators B-chemical}, volume = {329}, pages = {129195}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Riikonen, Joakim; Rantanen, Jimi; Thapa, Rinez; Le, Nguyen T; Rigolet, Severinne; Fioux, Philippe; Turhanen, Petri; Bodiford, Nelli K; Kalluri, Jhansi R; Ikonen, Timo; Nissinen, Tuomo; Lebeau, Benedicte; Vepsalainen, Jouko; Coffer, Jeffery L; Lehto, Vesa-Pekka Rapid synthesis of nanostructured porous silicon carbide from biogenic silica (Article de journal) Journal of the American Ceramic Society, 104 (2), p. 766–775, 2021. @article{Riikonen2021b, title = {Rapid synthesis of nanostructured porous silicon carbide from biogenic silica}, author = {Joakim Riikonen and Jimi Rantanen and Rinez Thapa and Nguyen T Le and Severinne Rigolet and Philippe Fioux and Petri Turhanen and Nelli K Bodiford and Jhansi R Kalluri and Timo Ikonen and Tuomo Nissinen and Benedicte Lebeau and Jouko Vepsalainen and Jeffery L Coffer and Vesa-Pekka Lehto}, doi = {10.1111/jace.17519}, year = {2021}, date = {2021-02-01}, journal = {Journal of the American Ceramic Society}, volume = {104}, number = {2}, pages = {766--775}, abstract = {Nanostructured silicon carbide (SiC) is an exceptional material with numerous applications, for example, in catalysis, biomedicine, high-performance composites, and sensing. In this study, a fast and scalable method of producing nanostructured SiC from plant materials by magnesiothermic reduction via self-propagating high-temperature synthesis (SHS) route was developed. The produced biogenic material possessed a high surface area above 200 m(2)/g with a SiC crystallite size below 10 nm, which has not been done previously by SHS. This method enables affordable synthesis of the material plant-based precursors in a reaction that only takes a few seconds, thereby paving a way for nanostructured SiC production in high volumes using renewable resources. The material was also functionalized with carboxylic acid and bisphosphonate moieties, and its use as metal adsorbent in applications such as wastewater remediation was demonstrated.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Nanostructured silicon carbide (SiC) is an exceptional material with numerous applications, for example, in catalysis, biomedicine, high-performance composites, and sensing. In this study, a fast and scalable method of producing nanostructured SiC from plant materials by magnesiothermic reduction via self-propagating high-temperature synthesis (SHS) route was developed. The produced biogenic material possessed a high surface area above 200 m(2)/g with a SiC crystallite size below 10 nm, which has not been done previously by SHS. This method enables affordable synthesis of the material plant-based precursors in a reaction that only takes a few seconds, thereby paving a way for nanostructured SiC production in high volumes using renewable resources. The material was also functionalized with carboxylic acid and bisphosphonate moieties, and its use as metal adsorbent in applications such as wastewater remediation was demonstrated. |
Riikonen, Joakim; Rantanen, Jimi; Thapa, Rinez; Le, Nguyen T; Rigolet, Severinne; Fioux, Philippe; Turhanen, Petri; Bodiford, Nelli K; Kalluri, Jhansi R; Ikonen, Timo; Nissinen, Tuomo; Lebeau, Benedicte; Vepsalainen, Jouko; Coffer, Jeffery L; Lehto, Vesa-Pekka Rapid synthesis of nanostructured porous silicon carbide from biogenic silica (Article de journal) Journal of the American Ceramic Society, 104 (2), p. 766–775, 2021. @article{Riikonen2021, title = {Rapid synthesis of nanostructured porous silicon carbide from biogenic silica}, author = { Joakim Riikonen and Jimi Rantanen and Rinez Thapa and Nguyen T. Le and Severinne Rigolet and Philippe Fioux and Petri Turhanen and Nelli K. Bodiford and Jhansi R. Kalluri and Timo Ikonen and Tuomo Nissinen and Benedicte Lebeau and Jouko Vepsalainen and Jeffery L. Coffer and Vesa-Pekka Lehto}, doi = {10.1111/jace.17519}, year = {2021}, date = {2021-02-01}, journal = {Journal of the American Ceramic Society}, volume = {104}, number = {2}, pages = {766--775}, abstract = {Nanostructured silicon carbide (SiC) is an exceptional material with numerous applications, for example, in catalysis, biomedicine, high-performance composites, and sensing. In this study, a fast and scalable method of producing nanostructured SiC from plant materials by magnesiothermic reduction via self-propagating high-temperature synthesis (SHS) route was developed. The produced biogenic material possessed a high surface area above 200 m(2)/g with a SiC crystallite size below 10 nm, which has not been done previously by SHS. This method enables affordable synthesis of the material plant-based precursors in a reaction that only takes a few seconds, thereby paving a way for nanostructured SiC production in high volumes using renewable resources. The material was also functionalized with carboxylic acid and bisphosphonate moieties, and its use as metal adsorbent in applications such as wastewater remediation was demonstrated.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Nanostructured silicon carbide (SiC) is an exceptional material with numerous applications, for example, in catalysis, biomedicine, high-performance composites, and sensing. In this study, a fast and scalable method of producing nanostructured SiC from plant materials by magnesiothermic reduction via self-propagating high-temperature synthesis (SHS) route was developed. The produced biogenic material possessed a high surface area above 200 m(2)/g with a SiC crystallite size below 10 nm, which has not been done previously by SHS. This method enables affordable synthesis of the material plant-based precursors in a reaction that only takes a few seconds, thereby paving a way for nanostructured SiC production in high volumes using renewable resources. The material was also functionalized with carboxylic acid and bisphosphonate moieties, and its use as metal adsorbent in applications such as wastewater remediation was demonstrated. |
Chen, Hong; Noirbent, Guillaume; Liu, Shaohui; Brunel, Damien; Graff, Bernadette; Gigmes, Didier; Zhang, Yijun; Sun, Ke; Morlet-Savary, Fabrice; Xiao, Pu; Dumur, Frederic; Lalevee, Jacques Bis-chalcone derivatives derived from natural products as near-UV/visible light sensitive photoinitiators for 3D/4D printing (Article de journal) Materials Chemistry Frontiers, 5 (2), p. 901–916, 2021. @article{Chen2021a, title = {Bis-chalcone derivatives derived from natural products as near-UV/visible light sensitive photoinitiators for 3D/4D printing}, author = {Hong Chen and Guillaume Noirbent and Shaohui Liu and Damien Brunel and Bernadette Graff and Didier Gigmes and Yijun Zhang and Ke Sun and Fabrice Morlet-Savary and Pu Xiao and Frederic Dumur and Jacques Lalevee}, doi = {10.1039/d0qm00755b}, year = {2021}, date = {2021-01-01}, journal = {Materials Chemistry Frontiers}, volume = {5}, number = {2}, pages = {901--916}, abstract = {Four series of bis-chalcone compounds based on benzylpiperidinone, tetrahydrothiopyranone, pyridine or biphenyl central parts are designed and synthesized, enabling the development of ten bis-chalcones varying both by the central cores and by the substitution patterns (ortho, meta, para-positions) and the choice of the different groups attached to the peripheral substituents (alkoxy or allyloxy-substituted aromatic rings, thiophene, or ferrocene). In this series of ten bis-chalcones, eight of them were never synthesized before (i.e. only bis-chalcones 8 and 10 were already reported albeit never used as photoinitiators). These different dyes are proposed as new near-UV/visible light sensitive photoinitiators, in combination with an amine and an iodonium salt, to initiate the free radical photopolymerization (FRP) of PEG-diacrylate and the cationic photopolymerization (CP) of EPOX under LED@405 nm and LED@375 nm irradiation conditions. For the photopolymerization of acrylates carried out between thin films in laminate, all the bis-chalcones proposed in this work show higher photoinitiation abilities upon irradiation with a LED at 375 nm than at 405 nm, which is mainly due to their excellent light absorption properties in the near-UV region. Markedly, in contrast with the other two series of bis-chalcone compounds, pyridine-based bis-chalcones prove to be the most efficient photoinitiators, especially the bis-chalcones 5 and 9. Furthermore, all of them can also promote the cationic polymerization of epoxides upon LED irradiation at 375 nm, in the presence of an iodonium salt and an amine. More interestingly, some 3D patterns fabricated through the free radical polymerization of PEG-diacrylate demonstrate reversible swelling properties and shape-memory for access to 4D printing.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Four series of bis-chalcone compounds based on benzylpiperidinone, tetrahydrothiopyranone, pyridine or biphenyl central parts are designed and synthesized, enabling the development of ten bis-chalcones varying both by the central cores and by the substitution patterns (ortho, meta, para-positions) and the choice of the different groups attached to the peripheral substituents (alkoxy or allyloxy-substituted aromatic rings, thiophene, or ferrocene). In this series of ten bis-chalcones, eight of them were never synthesized before (i.e. only bis-chalcones 8 and 10 were already reported albeit never used as photoinitiators). These different dyes are proposed as new near-UV/visible light sensitive photoinitiators, in combination with an amine and an iodonium salt, to initiate the free radical photopolymerization (FRP) of PEG-diacrylate and the cationic photopolymerization (CP) of EPOX under LED@405 nm and LED@375 nm irradiation conditions. For the photopolymerization of acrylates carried out between thin films in laminate, all the bis-chalcones proposed in this work show higher photoinitiation abilities upon irradiation with a LED at 375 nm than at 405 nm, which is mainly due to their excellent light absorption properties in the near-UV region. Markedly, in contrast with the other two series of bis-chalcone compounds, pyridine-based bis-chalcones prove to be the most efficient photoinitiators, especially the bis-chalcones 5 and 9. Furthermore, all of them can also promote the cationic polymerization of epoxides upon LED irradiation at 375 nm, in the presence of an iodonium salt and an amine. More interestingly, some 3D patterns fabricated through the free radical polymerization of PEG-diacrylate demonstrate reversible swelling properties and shape-memory for access to 4D printing. |
Beda, Adrian; Rabuel, Francois; Morcrette, Mathieu; Knopf, Stephan; Taberna, Pierre-Louis; Simon, Patrice; Ghimbeu, Camelia Matei Hard carbon key properties allow for the achievement of high Coulombic efficiency and high volumetric capacity in Na-ion batteries (Article de journal) Journal of Materials Chemistry A, 9 (3), p. 1743–1758, 2021. @article{Beda2021a, title = {Hard carbon key properties allow for the achievement of high Coulombic efficiency and high volumetric capacity in Na-ion batteries}, author = {Adrian Beda and Francois Rabuel and Mathieu Morcrette and Stephan Knopf and Pierre-Louis Taberna and Patrice Simon and Camelia Matei Ghimbeu}, doi = {10.1039/d0ta07687b}, year = {2021}, date = {2021-01-01}, journal = {Journal of Materials Chemistry A}, volume = {9}, number = {3}, pages = {1743--1758}, abstract = {The volumetric capacity and the initial Coulombic efficiency are features of major importance when it comes to the development of full-cell batteries, and are thus key characteristics to boost Na-ion batteries (NIBs) commercialization. To allow the improvement of these parameters, several hard carbon properties that are rarely addressed, such as tapped density and electrode porosity after calendaring, were investigated herein in relation with their physico-chemical characteristics and electrochemical performance. A series of sustainable and scalable synthesized hard carbon spheres with controlled properties were used in this purpose. It was found that the electrode porosity after calendaring decreases rather linearly with the graphite interlayer space (d(002)), the lowest value (41%) being reached for high temperature treated carbons (>1500 degrees C). No clear correlation could be established between the electrode porosity and the tapped density. This could be understood by the dependence of the tapped density on several interplaying parameters, including the porosity (open, closed and inter-grain) and the morphology (particle shape and size). The compact carbon electrodes could deliver a high volumetric capacity of similar to 300 mA h cm(-3). Such performance was achieved by combining low electrode porosity, low interlayer space, and low specific surface area as emphasized by comparison with several other labmade and commercial hard carbons. Moreover, these carbon spheres revealed an initial Coulombic efficiency of 92%, which is among the highest value reported for hard carbon. This could be correlated in large extent with the low values of the specific surface area of ultra-micropores (<0.7 nm), and further to the low amount of active sites and oxygen-containing functional groups. Several valuable propertyperformance correlations could be established, allowing for predicting the behavior of hard carbons in the Na-ion half-cells and full-cells.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The volumetric capacity and the initial Coulombic efficiency are features of major importance when it comes to the development of full-cell batteries, and are thus key characteristics to boost Na-ion batteries (NIBs) commercialization. To allow the improvement of these parameters, several hard carbon properties that are rarely addressed, such as tapped density and electrode porosity after calendaring, were investigated herein in relation with their physico-chemical characteristics and electrochemical performance. A series of sustainable and scalable synthesized hard carbon spheres with controlled properties were used in this purpose. It was found that the electrode porosity after calendaring decreases rather linearly with the graphite interlayer space (d(002)), the lowest value (41%) being reached for high temperature treated carbons (>1500 degrees C). No clear correlation could be established between the electrode porosity and the tapped density. This could be understood by the dependence of the tapped density on several interplaying parameters, including the porosity (open, closed and inter-grain) and the morphology (particle shape and size). The compact carbon electrodes could deliver a high volumetric capacity of similar to 300 mA h cm(-3). Such performance was achieved by combining low electrode porosity, low interlayer space, and low specific surface area as emphasized by comparison with several other labmade and commercial hard carbons. Moreover, these carbon spheres revealed an initial Coulombic efficiency of 92%, which is among the highest value reported for hard carbon. This could be correlated in large extent with the low values of the specific surface area of ultra-micropores (<0.7 nm), and further to the low amount of active sites and oxygen-containing functional groups. Several valuable propertyperformance correlations could be established, allowing for predicting the behavior of hard carbons in the Na-ion half-cells and full-cells. |
Caron, Aurore; Noirbent, Guillaume; Gigmes, Didier; Dumur, Frederic; Lalevee, Jacques Near-Infrared PhotoInitiating Systems: Photothermal versus Triplet-Triplet Annihilation-Based Upconversion Polymerization (Article de journal) Macromolecular Rapid Communications, p. 2100047, 2021. @article{Caron2021, title = {Near-Infrared PhotoInitiating Systems: Photothermal versus Triplet-Triplet Annihilation-Based Upconversion Polymerization}, author = {Aurore Caron and Guillaume Noirbent and Didier Gigmes and Frederic Dumur and Jacques Lalevee}, doi = {10.1002/marc.202100047}, year = {2021}, date = {2021-01-01}, journal = {Macromolecular Rapid Communications}, pages = {2100047}, abstract = {NIR light-induced polymerization has attracted more and more attention in the photopolymerization field due to the possibility to use safer and more penetrating wavelengths, reducing the hazardousness. Here, a novel perspective for the free radical polymerization of acrylate-based monomers based on triplet-triplet annihilation upconversion (TTA-UC) is proposed, avoiding the introduction of heavy metals, usually required in the TTA processes. Thermal imaging experiments and Fourier transform infrared spectroscopy are respectively used to record the temperature during NIR irradiation and measure the reactive function conversion. The competition between the TTA-UC and the NIR photothermal activation is investigated to compare the relative efficiency of both NIR processes. In view of the results obtained by the different methods, the photothermal effect seems to get the upper hand over the photoactivation of the system.}, keywords = {}, pubstate = {published}, tppubtype = {article} } NIR light-induced polymerization has attracted more and more attention in the photopolymerization field due to the possibility to use safer and more penetrating wavelengths, reducing the hazardousness. Here, a novel perspective for the free radical polymerization of acrylate-based monomers based on triplet-triplet annihilation upconversion (TTA-UC) is proposed, avoiding the introduction of heavy metals, usually required in the TTA processes. Thermal imaging experiments and Fourier transform infrared spectroscopy are respectively used to record the temperature during NIR irradiation and measure the reactive function conversion. The competition between the TTA-UC and the NIR photothermal activation is investigated to compare the relative efficiency of both NIR processes. In view of the results obtained by the different methods, the photothermal effect seems to get the upper hand over the photoactivation of the system. |
Rahal, Mahmoud; Graff, Bernadette; Toufaily, Joumana; Hamieh, Tayssir; Noirbent, Guillaume; Gigmes, Didier; Dumur, Frederic; Lalevee, Jacques Molecules (Basel, Switzerland), 26 (6), 2021. @article{Rahal2021a, title = {3-Carboxylic Acid and Formyl-Derived Coumarins as Photoinitiators in Photo-Oxidation or Photo-Reduction Processes for Photopolymerization upon Visible Light: Photocomposite Synthesis and 3D Printing Applications.}, author = {Mahmoud Rahal and Bernadette Graff and Joumana Toufaily and Tayssir Hamieh and Guillaume Noirbent and Didier Gigmes and Frederic Dumur and Jacques Lalevee}, doi = {10.3390/molecules26061753}, year = {2021}, date = {2021-01-01}, journal = {Molecules (Basel, Switzerland)}, volume = {26}, number = {6}, abstract = {In this paper, nine organic compounds based on the coumarin scaffold and different substituents were synthesized and used as high-performance photoinitiators for free radical photopolymerization (FRP) of meth(acrylate) functions under visible light irradiation using LED at 405 nm. In fact, these compounds showed a very high initiation capacity and very good polymerization profiles (both high rate of polymerization (Rp) and final conversion (FC)) using two and three-component photoinitiating systems based on coum/iodonium salt (0.1%/1% w/w) and coum/iodonium salt/amine (0.1%/1%/1% w/w/w), respectively. To demonstrate the efficiency of the initiation of photopolymerization, several techniques were used to study the photophysical and photochemical properties of coumarins, such as: UV-visible absorption spectroscopy, steady-state photolysis, real-time FTIR, and cyclic voltammetry. On the other hand, these compounds were also tested in direct laser write experiments (3D printing). The synthesis of photocomposites based on glass fiber or carbon fiber using an LED conveyor at 385 nm (0.7 W/cm2) was also examined.}, keywords = {}, pubstate = {published}, tppubtype = {article} } In this paper, nine organic compounds based on the coumarin scaffold and different substituents were synthesized and used as high-performance photoinitiators for free radical photopolymerization (FRP) of meth(acrylate) functions under visible light irradiation using LED at 405 nm. In fact, these compounds showed a very high initiation capacity and very good polymerization profiles (both high rate of polymerization (Rp) and final conversion (FC)) using two and three-component photoinitiating systems based on coum/iodonium salt (0.1%/1% w/w) and coum/iodonium salt/amine (0.1%/1%/1% w/w/w), respectively. To demonstrate the efficiency of the initiation of photopolymerization, several techniques were used to study the photophysical and photochemical properties of coumarins, such as: UV-visible absorption spectroscopy, steady-state photolysis, real-time FTIR, and cyclic voltammetry. On the other hand, these compounds were also tested in direct laser write experiments (3D printing). The synthesis of photocomposites based on glass fiber or carbon fiber using an LED conveyor at 385 nm (0.7 W/cm2) was also examined. |
Fakir, Abdellah Ait El; Anfar, Zakaria; Amedlous, Abdallah; Zbair, Mohamed; Hafidi, Zakaria; Achouri, Mohammed El; Jada, Amane; Alem, Noureddine El Engineering of new hydrogel beads based conducting polymers: Metal-free catalysis for highly organic pollutants degradation (Article de journal) Applied Catalysis B-environmental, 286 , p. 119948, 2021. @article{ElFakir2021, title = {Engineering of new hydrogel beads based conducting polymers: Metal-free catalysis for highly organic pollutants degradation}, author = {Abdellah Ait El Fakir and Zakaria Anfar and Abdallah Amedlous and Mohamed Zbair and Zakaria Hafidi and Mohammed El Achouri and Amane Jada and Noureddine El Alem}, doi = {10.1016/j.apcatb.2021.119948}, year = {2021}, date = {2021-01-01}, journal = {Applied Catalysis B-environmental}, volume = {286}, pages = {119948}, abstract = {Engineering of new heterogeneous metal-free catalysts is of great importance for persulfate activation. Herein, Innovative conductive polymers Polyaniline (PANI) and Polypyrrole (PPy) were used as promising catalysts for PS activation to effectively degrade organic pollutants. In fact, PANI and PPy can provide the necessary electron transfer based on nitrogen atoms located in the conjugated chains compared to their counterparts in the defective sites. In addition, PANI and PPy were immobilized inside membrane formed by cross linking alginate biopolymer by divalent calcium ions, in order to develop a new stable hydrogel beads catalyst. The prepared hydrogels-activated PS process could maintain excellent catalytic properties, mitigate catalysts deactivation, increased chemical stability and offer hope for their application in the industrial scale. The radical scavenging experiments monitored by the electron paramagnetic resonance and functional theory calculations, indicated the role of the PANI and PPy conjugated chains and the nature of the reaction pathways.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Engineering of new heterogeneous metal-free catalysts is of great importance for persulfate activation. Herein, Innovative conductive polymers Polyaniline (PANI) and Polypyrrole (PPy) were used as promising catalysts for PS activation to effectively degrade organic pollutants. In fact, PANI and PPy can provide the necessary electron transfer based on nitrogen atoms located in the conjugated chains compared to their counterparts in the defective sites. In addition, PANI and PPy were immobilized inside membrane formed by cross linking alginate biopolymer by divalent calcium ions, in order to develop a new stable hydrogel beads catalyst. The prepared hydrogels-activated PS process could maintain excellent catalytic properties, mitigate catalysts deactivation, increased chemical stability and offer hope for their application in the industrial scale. The radical scavenging experiments monitored by the electron paramagnetic resonance and functional theory calculations, indicated the role of the PANI and PPy conjugated chains and the nature of the reaction pathways. |
Xu, Yangyang; Noirbent, Guillaume; Brunel, Damien; Ding, Zhaofu; Gigmes, Didier; Graff, Bernadette; Xiao, Pu; é, Fréd; é, Jacques Lalev Allyloxy ketones as efficient photoinitiators with high migration stability in free radical polymerization and 3D printing (Article de journal) Dyes and Pigments, 185 , p. 108900, 2021. @article{Xu_2021, title = {Allyloxy ketones as efficient photoinitiators with high migration stability in free radical polymerization and 3D printing}, author = {Yangyang Xu and Guillaume Noirbent and Damien Brunel and Zhaofu Ding and Didier Gigmes and Bernadette Graff and Pu Xiao and Fréd é and Jacques Lalev é}, doi = {10.1016/j.dyepig.2020.108900}, year = {2021}, date = {2021-01-01}, journal = {Dyes and Pigments}, volume = {185}, pages = {108900}, publisher = {Elsevier BV}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Dahou, T; Defoort, F; Khiari, B; Labaki, M; Dupont, C; Jeguirim, M Role of inorganics on the biomass char gasification reactivity: A review involving reaction mechanisms and kinetics models (Article de journal) Renewable & Sustainable Energy Reviews, 135 , p. 110136, 2021. @article{Dahou2021, title = {Role of inorganics on the biomass char gasification reactivity: A review involving reaction mechanisms and kinetics models}, author = {T Dahou and F Defoort and B Khiari and M Labaki and C Dupont and M Jeguirim}, doi = {10.1016/j.rser.2020.110136}, year = {2021}, date = {2021-01-01}, journal = {Renewable & Sustainable Energy Reviews}, volume = {135}, pages = {110136}, abstract = {This review article presents the effects of the inorganic elements and compounds on gasification and their mechanisms of action. The influence of inorganics on the gasification reaction have been described in the literature. However, the specific phenomena involved and the mechanisms of action are not stated with consensus. Therefore, the present review gathers the various mechanisms proposed by authors. Some have been demonstrated to be unlikely such as the mechanisms involving intercalation compounds or mechanical actions. In order to give more practical applications of this work, the review also gathers the gasification kinetic models that take these inorganic effects into account.}, keywords = {}, pubstate = {published}, tppubtype = {article} } This review article presents the effects of the inorganic elements and compounds on gasification and their mechanisms of action. The influence of inorganics on the gasification reaction have been described in the literature. However, the specific phenomena involved and the mechanisms of action are not stated with consensus. Therefore, the present review gathers the various mechanisms proposed by authors. Some have been demonstrated to be unlikely such as the mechanisms involving intercalation compounds or mechanical actions. In order to give more practical applications of this work, the review also gathers the gasification kinetic models that take these inorganic effects into account. |
Chen, Hong; Zhang, Yijun; Bonfiglio, Anna; Morlet-Savary, Fabrice; Mauro, Matteo; Lalevee, Jacques Rhenium(I) N-Heterocyclic Carbene Complexes in Photoinitiating Systems for Polymerization upon Visible Light: Development of Photosensitive Resins for 3D and 4D Applications (Article de journal) Acs Applied Polymer Materials, 3 (1), p. 464–473, 2021. @article{Chen2021, title = {Rhenium(I) N-Heterocyclic Carbene Complexes in Photoinitiating Systems for Polymerization upon Visible Light: Development of Photosensitive Resins for 3D and 4D Applications}, author = {Hong Chen and Yijun Zhang and Anna Bonfiglio and Fabrice Morlet-Savary and Matteo Mauro and Jacques Lalevee}, doi = {10.1021/acsapm.0c01207}, year = {2021}, date = {2021-01-01}, journal = {Acs Applied Polymer Materials}, volume = {3}, number = {1}, pages = {464--473}, abstract = {Two fac-rhenium tris-carbonyl complexes bearing a pi-accepting pyridoannelated N-heterocyclic carbene (NHC) ligand with general formula Re(CO)(3) (pyipy)X, where pyipy is 2-pyridil-imidazo[1,5-a]pyridine-3-ylidene and X = CI (Re1) and Br (Re2), are investigated as photoredox catalytic systems in light-promoted polymerization reactions. Both rhenium(I) complexes are able to efficiently generate radicals to initiate free radical polymerization. Remarkably, excellent radical polymerization profiles and final conversions are obtained under soft irradiations (LED lamp, lambda(exc) = 405 nm) by using the proposed complexes with iodonium salt and amine as photoinitiating systems (PISs) for polyethyleneglycol (PEG)-acrylate monomers. The involved mechanism is investigated by means of different spectroscopic techniques and further supported by electrochemical data. In addition, using the prepared three-component PISs, outstanding 3D patterns with spatial resolution could be obtained through direct laser write experiments. Remarkably, the resulting material displays reversible deformation that can be controlled with heating-hydration cycles due to stimuli-responsiveness of PEG chains of the polymeric network, thus opening the way for innovative smart and stimuli-responsive 4D-printed materials and soft actuators.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Two fac-rhenium tris-carbonyl complexes bearing a pi-accepting pyridoannelated N-heterocyclic carbene (NHC) ligand with general formula Re(CO)(3) (pyipy)X, where pyipy is 2-pyridil-imidazo[1,5-a]pyridine-3-ylidene and X = CI (Re1) and Br (Re2), are investigated as photoredox catalytic systems in light-promoted polymerization reactions. Both rhenium(I) complexes are able to efficiently generate radicals to initiate free radical polymerization. Remarkably, excellent radical polymerization profiles and final conversions are obtained under soft irradiations (LED lamp, lambda(exc) = 405 nm) by using the proposed complexes with iodonium salt and amine as photoinitiating systems (PISs) for polyethyleneglycol (PEG)-acrylate monomers. The involved mechanism is investigated by means of different spectroscopic techniques and further supported by electrochemical data. In addition, using the prepared three-component PISs, outstanding 3D patterns with spatial resolution could be obtained through direct laser write experiments. Remarkably, the resulting material displays reversible deformation that can be controlled with heating-hydration cycles due to stimuli-responsiveness of PEG chains of the polymeric network, thus opening the way for innovative smart and stimuli-responsive 4D-printed materials and soft actuators. |
Zhang, Yijun; Josien, Ludovic; Salomon, Jean-Pierre; Simon-Masseron, Angelique; Lalevee, Jacques Photopolymerization of Zeolite/Polymer-Based Composites: toward 3D and 4D Printing Applications (Article de journal) Acs Applied Polymer Materials, 3 (1), p. 400–409, 2021. @article{Zhang2021b, title = {Photopolymerization of Zeolite/Polymer-Based Composites: toward 3D and 4D Printing Applications}, author = {Yijun Zhang and Ludovic Josien and Jean-Pierre Salomon and Angelique Simon-Masseron and Jacques Lalevee}, doi = {10.1021/acsapm.0c01170}, year = {2021}, date = {2021-01-01}, journal = {Acs Applied Polymer Materials}, volume = {3}, number = {1}, pages = {400--409}, abstract = {In recent years, photopolymerization has found wide applications in industry and daily life, especially 3D printing. However, some defective properties of photopolymers limit their development, such as their mechanical properties, density, compressive strength, and functionality. Herein, in this work, we reported the fabrication of composites containing seven different kinds of zeolites used as fillers under mild photopolymerization conditions (LTA-5A was selected as the benchmark zeolite), that is, visible LED light irradiation at room temperature under air. The filler properties affecting the related depth of cure and the enhanced mechanical (the storage modulus increased by 10-fold compared to that of a pure polymer) and functional properties were examined in detail. In addition, the production of 3D patterns was performed through direct laser writing (DLW) as a lithography technique. As a real breakthrough, the 3D printing of zeolite/polymer composites is presented here for the first time with high filler contents (up to 75 wt %) using this stereolithography approach. 4D behavior can be established in the presence of water, that is, the 3D object can change the shape and return to the starting geometry after desiccation. Remarkably, after debinding of the composites by thermal treatment, a high zeolite porosity can be regenerated. Therefore, the 3D printing of zeolites is possible in two steps: (i) photopolymerization of organic/zeolite composites to generate the desired shape, followed by (ii) removal of the organic part by thermal treatment. This work is expected to lead to valuable developments in the field of photopolymerization reactions in highly filled composites (with the filler content exceeding 50 wt %) and thereby expand their potential application for 3D or 4D printing in the fields of for example, high-performance lightweight materials and adsorption.}, keywords = {}, pubstate = {published}, tppubtype = {article} } In recent years, photopolymerization has found wide applications in industry and daily life, especially 3D printing. However, some defective properties of photopolymers limit their development, such as their mechanical properties, density, compressive strength, and functionality. Herein, in this work, we reported the fabrication of composites containing seven different kinds of zeolites used as fillers under mild photopolymerization conditions (LTA-5A was selected as the benchmark zeolite), that is, visible LED light irradiation at room temperature under air. The filler properties affecting the related depth of cure and the enhanced mechanical (the storage modulus increased by 10-fold compared to that of a pure polymer) and functional properties were examined in detail. In addition, the production of 3D patterns was performed through direct laser writing (DLW) as a lithography technique. As a real breakthrough, the 3D printing of zeolite/polymer composites is presented here for the first time with high filler contents (up to 75 wt %) using this stereolithography approach. 4D behavior can be established in the presence of water, that is, the 3D object can change the shape and return to the starting geometry after desiccation. Remarkably, after debinding of the composites by thermal treatment, a high zeolite porosity can be regenerated. Therefore, the 3D printing of zeolites is possible in two steps: (i) photopolymerization of organic/zeolite composites to generate the desired shape, followed by (ii) removal of the organic part by thermal treatment. This work is expected to lead to valuable developments in the field of photopolymerization reactions in highly filled composites (with the filler content exceeding 50 wt %) and thereby expand their potential application for 3D or 4D printing in the fields of for example, high-performance lightweight materials and adsorption. |
Hadroug, Samar; Jellali, Salah; Jeguirim, Mejdi; Kwapinska, Marzena; Hamdi, Helmi; Leahy, James J; Kwapinski, Witold Static and Dynamic Investigations on Leaching/Retention of Nutrients from Raw Poultry Manure Biochars and Amended Agricultural Soil (Article de journal) Sustainability, 13 (3), p. 1212, 2021. @article{Hadroug2021, title = {Static and Dynamic Investigations on Leaching/Retention of Nutrients from Raw Poultry Manure Biochars and Amended Agricultural Soil}, author = {Samar Hadroug and Salah Jellali and Mejdi Jeguirim and Marzena Kwapinska and Helmi Hamdi and James J Leahy and Witold Kwapinski}, doi = {10.3390/su13031212}, year = {2021}, date = {2021-01-01}, journal = {Sustainability}, volume = {13}, number = {3}, pages = {1212}, publisher = {MDPI AG}, abstract = {In this study, nutrients release/adsorption from/by raw poultry manure-derived biochar produced at a pyrolysis temperature of 600 degrees C (RPM-B) was assessed under static and dynamic conditions. Batch sequential leaching experiments of RPM-B for a total contact time of 10 days showed that both phosphorus and potassium were slowly released but with higher amounts compared to various other animal- and lignocellulosic-derived biochars. The cumulated released P and K amounts were assessed to 93.6 and 17.1 mg g(-1), which represent about 95% and 43% of their original contents in the RPM-B, respectively. The column combined leaching/adsorption experiments showed that amending an alkaline sandy agricultural soil with two doses of RPM-B (at 5% and 8% w:w) resulted in an efficient retention of NO3-N and NH4-N, and on the contrary, important leached amounts of PO4-P, K+, Mg2+, and Ca2+ but with relatively slow kinetic release rates for a long period. Even after 40 days of dynamic leaching, these latter nutrients continued to be released with kinetic rates lower than 10 mg kg(-1) d(-1). Thus, compared to synthetic fertilizers, RPM-B valorization as organic amendment for poor semiarid soils could be considered as an attractive, eco-friendly, and sustainable waste recycling option.}, keywords = {}, pubstate = {published}, tppubtype = {article} } In this study, nutrients release/adsorption from/by raw poultry manure-derived biochar produced at a pyrolysis temperature of 600 degrees C (RPM-B) was assessed under static and dynamic conditions. Batch sequential leaching experiments of RPM-B for a total contact time of 10 days showed that both phosphorus and potassium were slowly released but with higher amounts compared to various other animal- and lignocellulosic-derived biochars. The cumulated released P and K amounts were assessed to 93.6 and 17.1 mg g(-1), which represent about 95% and 43% of their original contents in the RPM-B, respectively. The column combined leaching/adsorption experiments showed that amending an alkaline sandy agricultural soil with two doses of RPM-B (at 5% and 8% w:w) resulted in an efficient retention of NO3-N and NH4-N, and on the contrary, important leached amounts of PO4-P, K+, Mg2+, and Ca2+ but with relatively slow kinetic release rates for a long period. Even after 40 days of dynamic leaching, these latter nutrients continued to be released with kinetic rates lower than 10 mg kg(-1) d(-1). Thus, compared to synthetic fertilizers, RPM-B valorization as organic amendment for poor semiarid soils could be considered as an attractive, eco-friendly, and sustainable waste recycling option. |
Bidaud, C; Berling, D; Jamon, D; Gamet, E; Neveu, S; Royer, F; Soppera, O Photocrosslinking and photopatterning of magneto-optical nanocomposite sol-gel thin film under deep-UV irradiation. (Article de journal) Scientific reports, 11 (1), p. 5075–5075, 2021. @article{Bidaud2021, title = {Photocrosslinking and photopatterning of magneto-optical nanocomposite sol-gel thin film under deep-UV irradiation.}, author = {C Bidaud and D Berling and D Jamon and E Gamet and S Neveu and F Royer and O Soppera}, doi = {10.1038/s41598-021-84376-6}, year = {2021}, date = {2021-01-01}, journal = {Scientific reports}, volume = {11}, number = {1}, pages = {5075--5075}, abstract = {This paper is aimed at investigating the process of photocrosslinking under Deep-UV irradiation of nanocomposite thin films doped with cobalt ferrite magnetic nanoparticles (MNPs). This material is composed of a hybrid sol-gel matrix in which MNP can be introduced with high concentrations up to 20 vol%. Deep-UV (193nm) is not only interesting for high-resolution patterning but we also show an efficient photopolymerization pathway even in the presence of high concentration of MNPs. In this study, we demonstrate that the photocrosslinking is based on the free radical polymerization of the methacrylate functions of the hybrid precursor. This process is initiated by Titanium-oxo clusters. The impact of the nanoparticles on the photopolymerization kinetic and photopatterning is investigated. We finally show that the photosensitive nanocomposite is suitable to obtain micropatterns with sub-micron resolution, with a simple and versatile process, which opens many opportunities for fabrication of miniaturized magneto-optical devices for photonic applications.}, keywords = {}, pubstate = {published}, tppubtype = {article} } This paper is aimed at investigating the process of photocrosslinking under Deep-UV irradiation of nanocomposite thin films doped with cobalt ferrite magnetic nanoparticles (MNPs). This material is composed of a hybrid sol-gel matrix in which MNP can be introduced with high concentrations up to 20 vol%. Deep-UV (193nm) is not only interesting for high-resolution patterning but we also show an efficient photopolymerization pathway even in the presence of high concentration of MNPs. In this study, we demonstrate that the photocrosslinking is based on the free radical polymerization of the methacrylate functions of the hybrid precursor. This process is initiated by Titanium-oxo clusters. The impact of the nanoparticles on the photopolymerization kinetic and photopatterning is investigated. We finally show that the photosensitive nanocomposite is suitable to obtain micropatterns with sub-micron resolution, with a simple and versatile process, which opens many opportunities for fabrication of miniaturized magneto-optical devices for photonic applications. |
Ghali, Mariem; Brahmi, Chaima; Benltifa, Mahmoud; Vaulot, Cyril; Airoudj, Aissam; Fioux, Philippe; Dumur, Frederic; Simonnet-Jegat, Corine; Morlet-Savary, Fabrice; Jellali, Salah; Bousselmi, Latifa; Lalevee, Jacques Characterization of polyoxometalate/polymer photo-composites: A toolbox for the photodegradation of organic pollutants (Article de journal) Journal of Polymer Science, 59 (2), p. 153–169, 2021. @article{Ghali2021, title = {Characterization of polyoxometalate/polymer photo-composites: A toolbox for the photodegradation of organic pollutants}, author = {Mariem Ghali and Chaima Brahmi and Mahmoud Benltifa and Cyril Vaulot and Aissam Airoudj and Philippe Fioux and Frederic Dumur and Corine Simonnet-Jegat and Fabrice Morlet-Savary and Salah Jellali and Latifa Bousselmi and Jacques Lalevee}, doi = {10.1002/pol.20200568}, year = {2021}, date = {2021-01-01}, journal = {Journal of Polymer Science}, volume = {59}, number = {2}, pages = {153--169}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Abdallah, Mira; Hijazi, Akram; Cozzi, Pier Giorgio; Gualandi, Andrea; Dumur, Frederic; Lalevee, Jacques Boron Compounds as Additives for the Cationic Polymerization Using Coumarin Derivatives in Epoxy Silicones (Article de journal) Macromolecular Chemistry and Physics, 222 (2), p. 2000404, 2021. @article{Abdallah2021, title = {Boron Compounds as Additives for the Cationic Polymerization Using Coumarin Derivatives in Epoxy Silicones}, author = {Mira Abdallah and Akram Hijazi and Pier Giorgio Cozzi and Andrea Gualandi and Frederic Dumur and Jacques Lalevee}, doi = {10.1002/macp.202000404}, year = {2021}, date = {2021-01-01}, journal = {Macromolecular Chemistry and Physics}, volume = {222}, number = {2}, pages = {2000404}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Isaac, Carole; Paillaud, Jean-Louis; Daou, Jean T; Ryzhikov, Andrey Synthesis of BEC-type germanosilicates with asymmetric diquaternary ammonium salts (Article de journal) Microporous and Mesoporous Materials, 312 , p. 110804, 2021. @article{Isaac2021, title = {Synthesis of BEC-type germanosilicates with asymmetric diquaternary ammonium salts}, author = {Carole Isaac and Jean-Louis Paillaud and Jean T Daou and Andrey Ryzhikov}, doi = {10.1016/j.micromeso.2020.110804}, year = {2021}, date = {2021-01-01}, journal = {Microporous and Mesoporous Materials}, volume = {312}, pages = {110804}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Arar, Ahmad; Wisson, Lilian; Lalevee, Jacques New Pure Organic and Peroxide-Free Redox Initiating Systems for Polymerization in Mild Conditions (Article de journal) Polymers, 13 (2), p. 301, 2021. @article{Arar2021, title = {New Pure Organic and Peroxide-Free Redox Initiating Systems for Polymerization in Mild Conditions}, author = {Ahmad Arar and Lilian Wisson and Jacques Lalevee}, doi = {10.3390/polym13020301}, year = {2021}, date = {2021-01-01}, journal = {Polymers}, volume = {13}, number = {2}, pages = {301}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Jellali, Salah; Azzaz, Ahmed Amine; Jeguirim, Mejdi; Hamdi, Helmi; Mlayah, Ammar Use of Lignite as a Low-Cost Material for Cadmium and Copper Removal from Aqueous Solutions: Assessment of Adsorption Characteristics and Exploration of Involved Mechanisms (Article de journal) Water, 13 (2), p. 164, 2021. @article{Jellali2021, title = {Use of Lignite as a Low-Cost Material for Cadmium and Copper Removal from Aqueous Solutions: Assessment of Adsorption Characteristics and Exploration of Involved Mechanisms}, author = {Salah Jellali and Ahmed Amine Azzaz and Mejdi Jeguirim and Helmi Hamdi and Ammar Mlayah}, doi = {10.3390/w13020164}, year = {2021}, date = {2021-01-01}, journal = {Water}, volume = {13}, number = {2}, pages = {164}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Beda, Adrian; Vaulot, Cyril; Ghimbeu, Camelia Matei Hard carbon porosity revealed by the adsorption of multiple gas probe molecules (N-2, Ar, CO2, O-2 and H-2) (Article de journal) Journal of Materials Chemistry A, 9 (2), p. 937–943, 2021. @article{Beda2021, title = {Hard carbon porosity revealed by the adsorption of multiple gas probe molecules (N-2, Ar, CO2, O-2 and H-2)}, author = {Adrian Beda and Cyril Vaulot and Camelia Matei Ghimbeu}, doi = {10.1039/d0ta10088a}, year = {2021}, date = {2021-01-01}, journal = {Journal of Materials Chemistry A}, volume = {9}, number = {2}, pages = {937--943}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Sprick, Elodie; Becht, Jean-Michel; Graff, Bernadette; Salomon, Jean-Pierre; Tigges, Thomas; Weber, Christoph; Lalevee, Jacques New hydrogen donors for amine-free photoinitiating systems in dental materials. (Article de journal) Dental materials : official publication of the Academy of Dental Materials, 2021. @article{Sprick2021, title = {New hydrogen donors for amine-free photoinitiating systems in dental materials.}, author = {Elodie Sprick and Jean-Michel Becht and Bernadette Graff and Jean-Pierre Salomon and Thomas Tigges and Christoph Weber and Jacques Lalevee}, doi = {10.1016/j.dental.2020.12.013}, year = {2021}, date = {2021-01-01}, journal = {Dental materials : official publication of the Academy of Dental Materials}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Majdoub, Mohammed; Amedlous, Abdallah; Anfar, Zakaria; Jada, Amane; Alem, Noureddine El Engineering of amine-based binding chemistry on functionalized graphene oxide/alginate hybrids for simultaneous and efficient removal of trace heavy metals: Towards drinking water. (Article de journal) Journal of colloid and interface science, 589 , p. 511–524, 2021. @article{Majdoub2021, title = {Engineering of amine-based binding chemistry on functionalized graphene oxide/alginate hybrids for simultaneous and efficient removal of trace heavy metals: Towards drinking water.}, author = {Mohammed Majdoub and Abdallah Amedlous and Zakaria Anfar and Amane Jada and Noureddine El Alem}, doi = {10.1016/j.jcis.2021.01.029}, year = {2021}, date = {2021-01-01}, journal = {Journal of colloid and interface science}, volume = {589}, pages = {511--524}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Platek-Mielczarek, Anetta; Nita, Cristina; Ghimbeu, Camelia Matei; Frackowiak, Elzbieta; Fic, Krzysztof Link between Alkali Metals in Salt Templates and in Electrolytes for Improved Carbon-Based Electrochemical Capacitors. (Article de journal) ACS applied materials & interfaces, 13 (2), p. 2584–2599, 2021. @article{Platek-Mielczarek2021, title = {Link between Alkali Metals in Salt Templates and in Electrolytes for Improved Carbon-Based Electrochemical Capacitors.}, author = {Anetta Platek-Mielczarek and Cristina Nita and Camelia Matei Ghimbeu and Elzbieta Frackowiak and Krzysztof Fic}, doi = {10.1021/acsami.0c18627}, year = {2021}, date = {2021-01-01}, journal = {ACS applied materials & interfaces}, volume = {13}, number = {2}, pages = {2584--2599}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Zeng, Boning; Cai, Zhenlong; Lalevee, Jacques; Yang, Qizhi; Lai, Haiwang; Xiao, Pu; Liu, Jing; Xing, Feiyue Cytotoxic and cytocompatible comparison among seven photoinitiators-triggered polymers in different tissue cells. (Article de journal) Toxicology in vitro : an international journal published in association with BIBRA, 72 , p. 105103–105103, 2021. @article{Zeng2021, title = {Cytotoxic and cytocompatible comparison among seven photoinitiators-triggered polymers in different tissue cells.}, author = {Boning Zeng and Zhenlong Cai and Jacques Lalevee and Qizhi Yang and Haiwang Lai and Pu Xiao and Jing Liu and Feiyue Xing}, doi = {10.1016/j.tiv.2021.105103}, year = {2021}, date = {2021-01-01}, journal = {Toxicology in vitro : an international journal published in association with BIBRA}, volume = {72}, pages = {105103--105103}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Schobing, Julie; Cesario, Moises; Dorge, Sophie; Nouali, Habiba; Patarin, Joel; Martens, Johan; Brilhac, Jean-Francois CuO supported on COK-12 and SBA-15 ordered mesoporous materials for temperature swing SOx adsorption (Article de journal) Fuel Processing Technology, 211 , p. 106586, 2021. @article{Schobing2021b, title = {CuO supported on COK-12 and SBA-15 ordered mesoporous materials for temperature swing SOx adsorption}, author = {Julie Schobing and Moises Cesario and Sophie Dorge and Habiba Nouali and Joel Patarin and Johan Martens and Jean-Francois Brilhac}, doi = {10.1016/j.fuproc.2020.106586}, year = {2021}, date = {2021-01-01}, journal = {Fuel Processing Technology}, volume = {211}, pages = {106586}, abstract = {Ordered mesoporous SBA-15 and COK-12 supports with similar mesopore diameter were loaded with 15 wt% of CuO and evaluated as adsorbents in a desulfurization process involving SOx adsorption and regeneration. Both SBA-15 and COK-12 have a hexagonal arrangement of parallel tubular mesopores. The impact of relatively small differences of the structural and textural properties of the two supports on SOx adsorption and regenerability is investigated. After impregnation with copper nitrate solution and calcination at 500 degrees C, the samples do not show any characteristic XRD pattern of copper-based phases, confirming the highly dispersed state of CuO, which is also checked by Transmission Electron Microscopy (TEM). The COK-CuO15 sample has slightly higher porosity than the SBA-CuO15 sample. The pore volume of both supports is slightly reduced after impregnation-calcination and shaping (Pelletized, Crushed and Sieved - PCS) steps. As for its SOx adsorptive properties, after fifteen adsorption-regeneration cycles at 400 degrees C, the COK-CuO15_PCS sample exhibits dynamic and total adsorption capacities higher than those of the SBA-CuO15_PCS adsorbent. In addition, both adsorbents preserve their adsorption capacities over the 15 cycles. The COK-12 support for the CuO active phase provides very promising results in comparison with the literature data for SBA-CuO15 adsorbent.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Ordered mesoporous SBA-15 and COK-12 supports with similar mesopore diameter were loaded with 15 wt% of CuO and evaluated as adsorbents in a desulfurization process involving SOx adsorption and regeneration. Both SBA-15 and COK-12 have a hexagonal arrangement of parallel tubular mesopores. The impact of relatively small differences of the structural and textural properties of the two supports on SOx adsorption and regenerability is investigated. After impregnation with copper nitrate solution and calcination at 500 degrees C, the samples do not show any characteristic XRD pattern of copper-based phases, confirming the highly dispersed state of CuO, which is also checked by Transmission Electron Microscopy (TEM). The COK-CuO15 sample has slightly higher porosity than the SBA-CuO15 sample. The pore volume of both supports is slightly reduced after impregnation-calcination and shaping (Pelletized, Crushed and Sieved - PCS) steps. As for its SOx adsorptive properties, after fifteen adsorption-regeneration cycles at 400 degrees C, the COK-CuO15_PCS sample exhibits dynamic and total adsorption capacities higher than those of the SBA-CuO15_PCS adsorbent. In addition, both adsorbents preserve their adsorption capacities over the 15 cycles. The COK-12 support for the CuO active phase provides very promising results in comparison with the literature data for SBA-CuO15 adsorbent. |
Gencoglu, Turkan; Eren, Tugce Nur; Lalevee, Jacques; Avci, Duygu Photoinitiating systems based on poly(ethylene imine) for Michael addition and free radical photopolymerization (Article de journal) Journal of Photochemistry and Photobiology A-chemistry, 404 , p. 112959, 2021. @article{Gencoglu2021b, title = {Photoinitiating systems based on poly(ethylene imine) for Michael addition and free radical photopolymerization}, author = {Turkan Gencoglu and Tugce Nur Eren and Jacques Lalevee and Duygu Avci}, doi = {10.1016/j.jphotochem.2020.112959}, year = {2021}, date = {2021-01-01}, journal = {Journal of Photochemistry and Photobiology A-chemistry}, volume = {404}, pages = {112959}, abstract = {Multifunctional polymeric photoinitiators with the ability of aza-Michael addition with acrylates, free radical polymerization of (meth)acrylates through type II photoinitiation and charge transfer complex (CTC) formation with iodonium salt (Iod) were prepared. They were synthesized via aza-Michael addition reaction between branched poly(ethylene imine) (PEI}, keywords = {}, pubstate = {published}, tppubtype = {article} } Multifunctional polymeric photoinitiators with the ability of aza-Michael addition with acrylates, free radical polymerization of (meth)acrylates through type II photoinitiation and charge transfer complex (CTC) formation with iodonium salt (Iod) were prepared. They were synthesized via aza-Michael addition reaction between branched poly(ethylene imine) (PEI |
Renkert, S; Fall, S; Motamen, S; Jarrosson, Th; Serein-Spirau, F; Heiser, Th; Simon, L; Reiter, G; Bubendorff, J L A new growth process for crystalline ultra-thin layers of conjugated oligomers used in field-effect transistor applications (Article de journal) Applied Surface Science, 539 , p. 148024, 2021. @article{Renkert2021b, title = {A new growth process for crystalline ultra-thin layers of conjugated oligomers used in field-effect transistor applications}, author = {S Renkert and S Fall and S Motamen and Th Jarrosson and F Serein-Spirau and Th Heiser and L Simon and G Reiter and J L Bubendorff}, doi = {10.1016/j.apsusc.2020.148024}, year = {2021}, date = {2021-01-01}, journal = {Applied Surface Science}, volume = {539}, pages = {148024}, abstract = {Most organic semiconductor materials dewet on silicon wafers with thermal oxide layers. While Si-wafers represent convenient substrates for building a field effect transistor (FET), dewetting largely destroys the possibility for obtaining a compact and continuous crystalline thin organic semiconductor film and thus limits the mobility in these systems. Using oligothiophenes, we present an approach where the initial dewetting process can be turned into an advantage for generating very thin but large crystalline domains of a size up to the millimetres with all molecules sharing a single orientation. Our approach can be easily extended to other molecules, which have strongly differing growth velocities in the various directions of the crystal, for example due to directional pi-stacking interactions. FETs devices based on such large crystalline domains showed charge carrier mobilities that were two orders of magnitude higher compared to non-crystallized films.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Most organic semiconductor materials dewet on silicon wafers with thermal oxide layers. While Si-wafers represent convenient substrates for building a field effect transistor (FET), dewetting largely destroys the possibility for obtaining a compact and continuous crystalline thin organic semiconductor film and thus limits the mobility in these systems. Using oligothiophenes, we present an approach where the initial dewetting process can be turned into an advantage for generating very thin but large crystalline domains of a size up to the millimetres with all molecules sharing a single orientation. Our approach can be easily extended to other molecules, which have strongly differing growth velocities in the various directions of the crystal, for example due to directional pi-stacking interactions. FETs devices based on such large crystalline domains showed charge carrier mobilities that were two orders of magnitude higher compared to non-crystallized films. |
Schobing, Julie; Cesario, Moises; Dorge, Sophie; Nouali, Habiba; Patarin, Joel; Martens, Johan; Brilhac, Jean-Francois CuO supported on COK-12 and SBA-15 ordered mesoporous materials for temperature swing SOx adsorption (Article de journal) Fuel Processing Technology, 211 , p. 106586, 2021. @article{Schobing2021, title = {CuO supported on COK-12 and SBA-15 ordered mesoporous materials for temperature swing SOx adsorption}, author = { Julie Schobing and Moises Cesario and Sophie Dorge and Habiba Nouali and Joel Patarin and Johan Martens and Jean-Francois Brilhac}, doi = {10.1016/j.fuproc.2020.106586}, year = {2021}, date = {2021-01-01}, journal = {Fuel Processing Technology}, volume = {211}, pages = {106586}, abstract = {Ordered mesoporous SBA-15 and COK-12 supports with similar mesopore diameter were loaded with 15 wt% of CuO and evaluated as adsorbents in a desulfurization process involving SOx adsorption and regeneration. Both SBA-15 and COK-12 have a hexagonal arrangement of parallel tubular mesopores. The impact of relatively small differences of the structural and textural properties of the two supports on SOx adsorption and regenerability is investigated. After impregnation with copper nitrate solution and calcination at 500 degrees C, the samples do not show any characteristic XRD pattern of copper-based phases, confirming the highly dispersed state of CuO, which is also checked by Transmission Electron Microscopy (TEM). The COK-CuO15 sample has slightly higher porosity than the SBA-CuO15 sample. The pore volume of both supports is slightly reduced after impregnation-calcination and shaping (Pelletized, Crushed and Sieved - PCS) steps. As for its SOx adsorptive properties, after fifteen adsorption-regeneration cycles at 400 degrees C, the COK-CuO15_PCS sample exhibits dynamic and total adsorption capacities higher than those of the SBA-CuO15_PCS adsorbent. In addition, both adsorbents preserve their adsorption capacities over the 15 cycles. The COK-12 support for the CuO active phase provides very promising results in comparison with the literature data for SBA-CuO15 adsorbent.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Ordered mesoporous SBA-15 and COK-12 supports with similar mesopore diameter were loaded with 15 wt% of CuO and evaluated as adsorbents in a desulfurization process involving SOx adsorption and regeneration. Both SBA-15 and COK-12 have a hexagonal arrangement of parallel tubular mesopores. The impact of relatively small differences of the structural and textural properties of the two supports on SOx adsorption and regenerability is investigated. After impregnation with copper nitrate solution and calcination at 500 degrees C, the samples do not show any characteristic XRD pattern of copper-based phases, confirming the highly dispersed state of CuO, which is also checked by Transmission Electron Microscopy (TEM). The COK-CuO15 sample has slightly higher porosity than the SBA-CuO15 sample. The pore volume of both supports is slightly reduced after impregnation-calcination and shaping (Pelletized, Crushed and Sieved - PCS) steps. As for its SOx adsorptive properties, after fifteen adsorption-regeneration cycles at 400 degrees C, the COK-CuO15_PCS sample exhibits dynamic and total adsorption capacities higher than those of the SBA-CuO15_PCS adsorbent. In addition, both adsorbents preserve their adsorption capacities over the 15 cycles. The COK-12 support for the CuO active phase provides very promising results in comparison with the literature data for SBA-CuO15 adsorbent. |
Gencoglu, Turkan; Eren, Tugce Nur; Lalevee, Jacques; Avci, Duygu Photoinitiating systems based on poly(ethylene imine) for Michael addition and free radical photopolymerization (Article de journal) Journal of Photochemistry and Photobiology A-chemistry, 404 , p. 112959, 2021. @article{Gencoglu2021, title = {Photoinitiating systems based on poly(ethylene imine) for Michael addition and free radical photopolymerization}, author = { Turkan Gencoglu and Tugce Nur Eren and Jacques Lalevee and Duygu Avci}, doi = {10.1016/j.jphotochem.2020.112959}, year = {2021}, date = {2021-01-01}, journal = {Journal of Photochemistry and Photobiology A-chemistry}, volume = {404}, pages = {112959}, abstract = {Multifunctional polymeric photoinitiators with the ability of aza-Michael addition with acrylates, free radical polymerization of (meth)acrylates through type II photoinitiation and charge transfer complex (CTC) formation with iodonium salt (Iod) were prepared. They were synthesized via aza-Michael addition reaction between branched poly(ethylene imine) (PEI}, keywords = {}, pubstate = {published}, tppubtype = {article} } Multifunctional polymeric photoinitiators with the ability of aza-Michael addition with acrylates, free radical polymerization of (meth)acrylates through type II photoinitiation and charge transfer complex (CTC) formation with iodonium salt (Iod) were prepared. They were synthesized via aza-Michael addition reaction between branched poly(ethylene imine) (PEI |
Renkert, S; Fall, S; Motamen, S; Jarrosson, Th; Serein-Spirau, F; Heiser, Th; Simon, L; Reiter, G; Bubendorff, J L A new growth process for crystalline ultra-thin layers of conjugated oligomers used in field-effect transistor applications (Article de journal) Applied Surface Science, 539 , p. 148024, 2021. @article{Renkert2021, title = {A new growth process for crystalline ultra-thin layers of conjugated oligomers used in field-effect transistor applications}, author = { S. Renkert and S. Fall and S. Motamen and Th Jarrosson and F. Serein-Spirau and Th Heiser and L. Simon and G. Reiter and J. L. Bubendorff}, doi = {10.1016/j.apsusc.2020.148024}, year = {2021}, date = {2021-01-01}, journal = {Applied Surface Science}, volume = {539}, pages = {148024}, abstract = {Most organic semiconductor materials dewet on silicon wafers with thermal oxide layers. While Si-wafers represent convenient substrates for building a field effect transistor (FET), dewetting largely destroys the possibility for obtaining a compact and continuous crystalline thin organic semiconductor film and thus limits the mobility in these systems. Using oligothiophenes, we present an approach where the initial dewetting process can be turned into an advantage for generating very thin but large crystalline domains of a size up to the millimetres with all molecules sharing a single orientation. Our approach can be easily extended to other molecules, which have strongly differing growth velocities in the various directions of the crystal, for example due to directional pi-stacking interactions. FETs devices based on such large crystalline domains showed charge carrier mobilities that were two orders of magnitude higher compared to non-crystallized films.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Most organic semiconductor materials dewet on silicon wafers with thermal oxide layers. While Si-wafers represent convenient substrates for building a field effect transistor (FET), dewetting largely destroys the possibility for obtaining a compact and continuous crystalline thin organic semiconductor film and thus limits the mobility in these systems. Using oligothiophenes, we present an approach where the initial dewetting process can be turned into an advantage for generating very thin but large crystalline domains of a size up to the millimetres with all molecules sharing a single orientation. Our approach can be easily extended to other molecules, which have strongly differing growth velocities in the various directions of the crystal, for example due to directional pi-stacking interactions. FETs devices based on such large crystalline domains showed charge carrier mobilities that were two orders of magnitude higher compared to non-crystallized films. |
2020 |
Sahin, Nihat; Silva, Wanderson O; Camilo, Mariana R; Ticianelli, Edson A; Lima, Fabio H B; Parmentier, Julien; Comminges, Clement; Napporn, Teko W; Kokoh, Kouakou B CO2 electroreduction to fuels on mesoporous carbon-embedded copper nanoparticles (Article de journal) Sustainable Energy & Fuels, 4 (12), p. 6045–6053, 2020. @article{Sahin2020, title = {CO2 electroreduction to fuels on mesoporous carbon-embedded copper nanoparticles}, author = {Nihat Sahin and Wanderson O Silva and Mariana R Camilo and Edson A Ticianelli and Fabio H B Lima and Julien Parmentier and Clement Comminges and Teko W Napporn and Kouakou B Kokoh}, doi = {10.1039/d0se01025a}, year = {2020}, date = {2020-12-01}, journal = {Sustainable Energy & Fuels}, volume = {4}, number = {12}, pages = {6045--6053}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Miskaki, Christina; Moutsios, Ioannis; Manesi, Gkreti-Maria; Artopoiadis, Konstantinos; Chang, Cheng-Yen; Bersenev, Egor A; Moschovas, Dimitrios; Ivanov, Dimitri A; Ho, Rong-Ming; Avgeropoulos, Apostolos Self-Assembly of Low-Molecular-Weight Asymmetric Linear Triblock Terpolymers: How Low Can We Go? (Article de journal) Molecules, 25 (23), p. 5527, 2020. @article{Miskaki2020, title = {Self-Assembly of Low-Molecular-Weight Asymmetric Linear Triblock Terpolymers: How Low Can We Go?}, author = {Christina Miskaki and Ioannis Moutsios and Gkreti-Maria Manesi and Konstantinos Artopoiadis and Cheng-Yen Chang and Egor A Bersenev and Dimitrios Moschovas and Dimitri A Ivanov and Rong-Ming Ho and Apostolos Avgeropoulos}, doi = {10.3390/molecules25235527}, year = {2020}, date = {2020-12-01}, journal = {Molecules}, volume = {25}, number = {23}, pages = {5527}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Beda, Adrian; Meins, Jean-Marc Le; Taberna, Pierre-Louis; Simon, Patrice; Ghimbeu, Camelia Matei Impact of biomass inorganic impurities on hard carbon properties and performance in Na-ion batteries (Article de journal) Sustainable Materials and Technologies, 26 , p. e00227, 2020. @article{Beda2020a, title = {Impact of biomass inorganic impurities on hard carbon properties and performance in Na-ion batteries}, author = {Adrian Beda and Jean-Marc Le Meins and Pierre-Louis Taberna and Patrice Simon and Camelia Matei Ghimbeu}, doi = {10.1016/j.susmat.2020.e00227}, year = {2020}, date = {2020-12-01}, journal = {Sustainable Materials and Technologies}, volume = {26}, pages = {e00227}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Lakard, S; Contal, E; Mougin, K; Magnenet, C; Lakard, B Electrochemical preparation and physicochemical study of polymers obtained from carbazole and N-((methoxycarbonyl)methyl)carbazole (Article de journal) Synthetic Metals, 270 , p. 116584, 2020. @article{Lakard2020, title = {Electrochemical preparation and physicochemical study of polymers obtained from carbazole and N-((methoxycarbonyl)methyl)carbazole}, author = {S Lakard and E Contal and K Mougin and C Magnenet and B Lakard}, doi = {10.1016/j.synthmet.2020.116584}, year = {2020}, date = {2020-12-01}, journal = {Synthetic Metals}, volume = {270}, pages = {116584}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Boumaiza, Hella; Dutournie, Patrick; Meins, Jean-Marc Le; Limousy, Lionel; Brendle, Jocelyne; Martin, Christelle; Michau, Nicolas; Dzene, Liva Iron-rich clay mineral synthesis using design of experiments approach (Article de journal) Applied Clay Science, 199 , p. 105876, 2020. @article{Boumaiza2020, title = {Iron-rich clay mineral synthesis using design of experiments approach}, author = {Hella Boumaiza and Patrick Dutournie and Jean-Marc Le Meins and Lionel Limousy and Jocelyne Brendle and Christelle Martin and Nicolas Michau and Liva Dzene}, doi = {10.1016/j.clay.2020.105876}, year = {2020}, date = {2020-12-01}, journal = {Applied Clay Science}, volume = {199}, pages = {105876}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Gibot, Pierre; Vidal, Loic; Laffont, Lydia; Mory, Julien Zirconia nanopowder synthesis via detonation of trinitrotoluene (Article de journal) Ceramics International, 46 (17), p. 27057–27062, 2020. @article{Gibot2020, title = {Zirconia nanopowder synthesis via detonation of trinitrotoluene}, author = { Pierre Gibot and Loic Vidal and Lydia Laffont and Julien Mory}, doi = {10.1016/j.ceramint.2020.07.182}, year = {2020}, date = {2020-12-01}, journal = {Ceramics International}, volume = {46}, number = {17}, pages = {27057--27062}, abstract = {Zirconium (IV) oxide nanopowder was successfully synthesized through the detonation of a mixture composed of 2,4,6 trinitrotoluene (TNT, C7H5N3O6) and zirconium sulfate tetrahydrate (Zr(SO4)(2)center dot 4H(2)O) as the energetic material and ceramic precursor, respectively. TNT, one of the most popular explosives, is a secondary energetic molecule and exhibits high stability and low sensitivity toward external stresses, making its handling safe. After detonation of the energetic material/ceramic precursor mixture and purification of the detonation soot, a crystallized zirconium oxide (ZrO2) powder composed of nanosized particles with a spherical morphology was produced and analysed by the usual characterization techniques (X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy and nitrogen physisorption). The reaction mechanism, considering the thermochemical aspect of the explosive, is offered. This approach could provide promising opportunities for the synthesis of various nano-sized oxide ceramic powders.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Zirconium (IV) oxide nanopowder was successfully synthesized through the detonation of a mixture composed of 2,4,6 trinitrotoluene (TNT, C7H5N3O6) and zirconium sulfate tetrahydrate (Zr(SO4)(2)center dot 4H(2)O) as the energetic material and ceramic precursor, respectively. TNT, one of the most popular explosives, is a secondary energetic molecule and exhibits high stability and low sensitivity toward external stresses, making its handling safe. After detonation of the energetic material/ceramic precursor mixture and purification of the detonation soot, a crystallized zirconium oxide (ZrO2) powder composed of nanosized particles with a spherical morphology was produced and analysed by the usual characterization techniques (X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy and nitrogen physisorption). The reaction mechanism, considering the thermochemical aspect of the explosive, is offered. This approach could provide promising opportunities for the synthesis of various nano-sized oxide ceramic powders. |
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