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

0458236 - ÚACH 2017 RIV GB eng J - Journal Article
Škoda, D. - Stýskalík, A. - Moravec, Z. - Bezdička, Petr - Babiak, M. - Klementová, Mariana - Barnes, C. E. - Pinkas, J.
Novel non-hydrolytic templated sol-gel synthesis of mesoporous aluminosilicates and their use as aminolysis catalysts.
RSC Advances. Roč. 6, č. 29 (2016), s. 24273-24284. E-ISSN 2046-2069
Institutional support: RVO:61388980
Keywords : Molecular-sieves * Hydrothermal stability * Structural evolution * NMR-spectroscopy * Mullite
Subject RIV: CA - Inorganic Chemistry
Impact factor: 3.108, year: 2016

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°C, converted to stable mesoporous xerogels with a high surface area (>600 m2 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.
Permanent Link: http://hdl.handle.net/11104/0258529