Study of the Reactive Surfaces of Clay Minerals
L. Dzene, J. Brendlé, S. Hajjar-Garreau, P. Dutournié
Phyllosilicates are a particular class of porous materials with high anisotropy and, consequently, different types of reactive surfaces. Three main types of surfaces are distinguished : an interlayer surface with a thickness of few angstroms, a basal surface of siloxanes, and an edge surface similar to that of metal oxides. This characteristic and their widespread availability make clay minerals a material of choice for water remediation, as an additive in polymers and cements, as an encapsulating agent, and as a support in heterogeneous catalysis.
Scheme of clay mineral structures
Our research focuses on the identification and quantification of active sites and different types of surfaces on natural and synthetic phyllosilicates, as well as on understanding condensation reactions to control the synthesis of new materials with targeted properties. We use the design of experiments method for the synthesis of new materials and multiple analytical methods such as X-ray diffraction and nuclear magnetic resonance spectroscopy to unravel the complexity of the structure of clay minerals. Active sites are probed using the thermal desorption method, and the surface is characterized using gas adsorption isotherms and X-ray photoelectron spectroscopy. The field of clay mineralogy offers opportunities for multidisciplinary collaborations and the advancement is a result of a collaborative effort between such scientific disciplines as physics, chemistry, geology, soil science, materials science and engineering.
Publications
Formation of iron-rich clay minerals in FeO-SiO2-H2O system during hydrothermal synthesis as a function of pH. L. Dzene, A. Doggaz, P. Dutournié, S. Inoué, M. Abdelmoula, A. Jourdain, J.-M. Le Meins, J. Brendlé, C. Martin, N. Michau, N. Clays Minerals, 2024, 10.1180/clm.2024.8
Encapsulation of butylimidazole in smectite and slow release for enhanced copper corrosion inhibition B. Matangouo, G. K. Dedzo*, L. Dzene, C. P. Nanseu-Njiki, E. Ngameni,, Applied Clay Science 2021 213, 106266 DOI 10.1016/j.clay.2021.106266
Review : Clay-Modified Electrodes in Heterogeneous Electro-Fenton Process for Degradation of Organic Compounds : The Potential of Structural Fe(III) as Catalytic Sites L. Cipriano Crapina, L. Dzene, J. Brendlé, F. Fourcade, A. Amrane, L. Limousy, . Materials, Applied Clay Science 2021 14, 7742 DOI 10.3390/ma14247742
Iron-Rich Clay Mineral Synthesis Using Design of Experiments Approach, H. Boumaiza, P. Dutournié, J-M. Le Meins, L. Limousy, J. Brendlé, C. Martin, N. Michau, L. Dzene,. Appl. Clay Sci. 2020 199, 105876. DOI : 10.1016/j.clay.2020.105876
Influence of the Precursor and the Temperature of Synthesis on the Structure of Saponite S. Meyer, S. Bennici, C. Vaulot, S. Rigolet, L.Dzene,. Clays Clay Miner. 2020 68 , 544. DOI 10.1007/s42860-020-00099-1
Effect of synthetic beidellite structural characteristics on the properties of beidellite/Fe oxides magnetic composites as Sr and Cs adsorbent materials M. L. Montes, F. Barraque, A.L. Bursztyn Fuentes, M.A. Taylor, R.C. Mercader, J. Miehé-Brendlé, R.M. Torres Sanchez, Materials Chemistry and Physics 2020 245, 122760 DOI 10.1016/j.matchemphys.2020.122760
IS2M
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