Publication details

Mesoporous titanosilicates by templated non-hydrolytic sol–gel reactions

Authors

ŠKODA David STÝSKALÍK Aleš MORAVEC Zdeněk BEZDIČKA Petr BARNES Craig E. PINKAS Jiří

Year of publication 2015
Type Article in Periodical
Magazine / Source Journal of Sol-Gel Science and Technology
MU Faculty or unit

Central European Institute of Technology

Citation
Web http://link.springer.com/article/10.1007%2Fs10971-015-3666-8#
Doi http://dx.doi.org/10.1007/s10971-015-3666-8
Field Inorganic chemistry
Keywords Non-hydrolytic sol-gel; Templating; Acetamide elimination; Mesoporous; Epoxidation Catalysis
Description A novel templated non-hydrolytic sol–gel synthesis of titanosilicate xerogels is reported. Acetamide elimination from silicon acetate and titanium diethylamide allows obtaining titanosilicates with a high content of Si-O-Ti bonds but low surface areas. These xerogels lose porosity on calcination. However, with addition of Pluronic P123 as a structure-directing agent, we synthesized mesoporous titanosilicate materials with large surface areas (up to 615 m2 g-1) and well dispersed tetrahedral Ti that are stable at temperatures up to 500 °C. These potential catalysts were characterized by variety of physico-chemical methods (IR, GC–MS, XRD, 29Si and 13C CPMAS NMR, DRUV-Vis, and N2 porosimetry) and tested in cyclohexene epoxidation with cumyl hydroperoxide in toluene. They display catalytic activity with the 100 % selectivity to cyclohexene oxide and high catalytic yields up to 96 % which is comparable to previously reported titanosilicate catalysts.
Related projects:

You are running an old browser version. We recommend updating your browser to its latest version.

More info