Synthesis and Textural Characterization of Mesoporous and Meso-/Macroporous Silica Monoliths Obtained by Spinodal Decomposition
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Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-Université de Montpellier-ENSCM, ENSCM, 8 rue de l’Ecole Normale, 34296 Montpellier Cedex 05, France
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Laboratoire de Chimie des Matériaux, Faculté des Sciences Appliquées et Exactes, University of Oran 1 Ahmed Ben Bella, BP 1524 Oran, Algeria
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Department of Chemical Engineering and Process Design, Silesian University of Technology, 44-100 Gliwice, Ks. M. Strzody 7, Poland
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Institute of Chemical Engineering, Polish Academy of Sciences, 44-100 Gliwice, Bałtycka 5, Poland
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Université de Nantes, Institut des Matériaux de Nantes-Jean Rouxel (IMN), Polytech Nantes, Rue Christian Pauc, BP 50609, 44306 Nantes Cedex 3, France
*
Author to whom correspondence should be addressed.
Academic Editors: Samuel Bernard, Andre Ayral and Philippe Miele
Inorganics 2016, 4(2), 9; https://doi.org/10.3390/inorganics4020009
Received: 26 February 2016 / Revised: 21 March 2016 / Accepted: 22 March 2016 / Published: 18 April 2016
(This article belongs to the Special Issue Mesoporous Materials)
Silica monoliths featuring either mesopores or flow-through macropores and mesopores in their skeleton are prepared by combining spinodal phase separation and sol-gel condensation. The macroporous network is first generated by phase separation in acidic medium in the presence of polyethyleneoxides while mesoporosity is engineered in a second step in alkaline medium, possibly in the presence of alkylammonium cations as surfactants. The mesoporous monoliths, also referred as aerogels, are obtained in the presence of alkylpolyethylene oxides in acidic medium without the use of supercritical drying. The impact of the experimental conditions on pore architecture of the monoliths regarding the shape, the ordering, the size and the connectivity of the mesopores is comprehensively discussed based on a critical appraisal of the different models used for textural analysis.
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Keywords:
silica monolith; aerogel; pressure drop; pore size; pore shape; hierarchical material
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MDPI and ACS Style
Galarneau, A.; Abid, Z.; Said, B.; Didi, Y.; Szymanska, K.; Jarzębski, A.; Tancret, F.; Hamaizi, H.; Bengueddach, A.; Di Renzo, F.; Fajula, F. Synthesis and Textural Characterization of Mesoporous and Meso-/Macroporous Silica Monoliths Obtained by Spinodal Decomposition. Inorganics 2016, 4, 9.
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