Surface and porous textural properties of silica–wollastonite composites prepared by sol–gel process
| Autor: | Sylvie Calas-Etienne, Bruno Colaiocco, Florence Despetis, Thierry Woignier, A. Alaoui, Laurent Bonnet, Philippe Dieudonné-George, Liz Anez-Borges, Lismarihen Larreal de Hernandez, Said Tahir |
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| Přispěvatelé: | Universidad del Zulia (LUZ), Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE), Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement [IRD] : UMR237-Centre National de la Recherche Scientifique (CNRS), Faculté des sciences et Techniques de Tanger, Université Abdelmalek Essaâdi (UAE), Laboratoire Charles Coulomb (L2C), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement [IRD] : UMR237-Aix Marseille Université (AMU)-Avignon Université (AU) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Carbonation Composite number Carbon dioxide sequestration 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Wollastonite Biomaterials Colloid Filler (materials) Materials Chemistry Composite material Porosity Sol-gel Gas adsorption-desorption Sol–gel materials Mineral carbonation General Chemistry Silica-wollastonite xerocomposite SAXS [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Electronic Optical and Magnetic Materials Ceramics and Composites engineering 0210 nano-technology Porous medium |
| Zdroj: | Journal of Sol-Gel Science and Technology Journal of Sol-Gel Science and Technology, Springer Verlag, 2019, 90 (1), pp.113-125. ⟨10.1007/s10971-018-4874-9⟩ Journal of Sol-Gel Science and Technology, 2019, 90 (1), pp.113-125. ⟨10.1007/s10971-018-4874-9⟩ |
| ISSN: | 0928-0707 1573-4846 |
| Popis: | International audience; Silica–wollastonite xerogel composites (xerocomposites) with different wollastonite filler content were obtained after classical drying of silica–wollastonite gels. Two different silica precursors were used, TEOS and colloidal LUDOX, for composites named TW and LW, respectively. We utilized SAXS experiments, N2 adsorption–desorption, and SEM techniques to determine the textural and structural properties of these porous materials. For both the TW and LW composites, it was shown that a macroporosity and a mesoporosity coexist. We argue that the proportion of macroporosity directly depends on the proportion of wollastonite fillers in the composite. We propose a unique two-stage drying mechanism to explain the formation of macropores. We additionally found that the surface of wollastonite fillers was covered by a dense multilayer packing of silica colloids in LUDOX LW xerocomposites. We believe that these surface-modified wollastonite fillers could improve the carbonation kinetics of wollastonite when used as a precursor for aqueous mineral carbonation, a promising route for safe and durable carbon sequestration. |
| Databáze: | OpenAIRE |
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