Novel non-hydrolytic templated sol-gel synthesis of mesoporous aluminosilicates and their use as aminolysis catalysts

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Authors	ŠKODA David STÝSKALÍK Aleš MORAVEC Zdeněk BEZDIČKA Petr BABIAK Michal KLEMENTOVÁ Mariana BARNES Craig E. PINKAS Jiří
Year of publication	2016
Type	Article in Periodical
Magazine / Source	RSC Advances
MU Faculty or unit	Central European Institute of Technology
Citation
Web	http://pubs.rsc.org/en/Content/ArticleLanding/2016/RA/C5RA24563J#!divAbstract
Doi	http://dx.doi.org/10.1039/c5ra24563j
Field	Inorganic chemistry
Keywords	Sol-gel; Non-hydrolytic condensation; Templating; Acetamide elimination; Mesoporous; Mixed oxides; Aluminosilicate; Aminolysis; Catalysis
Description	A novel non-hydrolytic sol-gel (NHSG) synthesis of mesoporous aluminosilicate xerogels is presented. The polycondensation between silicon acetate, Si(OAc)(4), and tris(dimethylamido) alane, Al(NMe2)(3), leads to homogeneous aluminosilicate xerogels containing Si-O-Al linkages through dimethylacetamide elimination. The addition of Pluronic P123 and F127 templates provides stiff gels that are, after calcination at 500 degrees C, converted to stable mesoporous xerogels with a high surface area (>600 m(2) g(-1)) and wormhole-type pores (d = 5.9 nm). The xerogels exhibit high catalytic activity in aminolysis of styrene oxide (82% conversion) with the turnover frequency up to 100.
Related projects:	Nehydrolytické sol-gelové reakce pro přípravu křemičitanů a fosforečnanů s řízenou porozitou a funkčními skupinami na povrchu CEITEC 2020