Novel non-hydrolytic templated sol-gel synthesis of mesoporous aluminosilicates and their use as aminolysis catalysts
| Autoři | |
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| Rok publikování | 2016 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | RSC Advances |
| Fakulta / Pracoviště MU | |
| Citace | |
| www | http://pubs.rsc.org/en/Content/ArticleLanding/2016/RA/C5RA24563J#!divAbstract |
| Doi | http://dx.doi.org/10.1039/c5ra24563j |
| Obor | Anorganická chemie |
| Klíčová slova | Sol-gel; Non-hydrolytic condensation; Templating; Acetamide elimination; Mesoporous; Mixed oxides; Aluminosilicate; Aminolysis; Catalysis |
| Popis | 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. |
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