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Updated: Jul 30, 2025
Synthesis and Reaction Chemistry of Nanosize Monosodium Titanate
Published on: February 23, 2016
Synthesis of titanosilicate nanoparticles with high titanium content from a silsesquioxane-based precursor for a
Takahiko Moteki1, Tomohiro Sei1, Masaru Ogura1
1Materials and Environmental Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan. moteki@iis.u-tokyo.ac.jp.
Abstract:
In conventional hydrothermal synthesis of porous titanosilicate materials, undesired aggregation of TiO2 species during the synthesis limits the content of active four-coordinated Ti to an Si/Ti ratio of about 40. Aiming to increase the content of active four-coordinated Ti species, we report a bottom-up synthesis of titanosilicate nanoparticles using a Ti-incorporated cubic silsesquioxane cage as a precursor, which allowed incorporating a larger number of four-coordinated Ti species in the silica matrix to reach an Si/Ti ratio of 19. Even at this relatively high Ti concentration, the catalytic activity in the epoxidation of cyclohexene over the titanosilicate nanoparticles was comparable to that of a conventional reference Ti catalyst, Ti-MCM-41, with an Si/Ti ratio of 60. The activity per Ti site was not affected by the Ti content in the nanoparticles, suggesting that well dispersed and stabilized Ti species were the active sites.
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