Issue 7, 2013
From the journal:

Journal of Materials Chemistry A

A novel route for preparation of Ti-containing mesoporous silica with high catalytic performance by using a molecular precursor tetrakis(tris-tert-butoxysiloxy)titanium†

Kwang-Min Choi,a   Toshiyuki Yokoi,c   Takashi Tatsumic  and  Kazuyuki Kuroda*ab  

* Corresponding authors

a Department of Applied Chemistry, Faculty of Science & Engineering, Waseda University, Ohkubo 3-4-1, Shinjuku-ku, Tokyo, Japan
E-mail: kuroda@waseda.jp
Fax: +81 3 5286 3199
Tel: +81 3 5286 3199

b Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, Nishiwaseda 2-8-26, Shinjuku-ku, Tokyo 169-0051, Japan

c Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan

Abstract

Mesoporous silica containing isolated Ti with variable Si/Ti ratios was prepared by pyrolysis of a mixture of tetrakis(tris-tert-butoxysiloxy)titanium (TS4) and tetraethoxysilane (TEOS) through a hard template method. TEOS plays two roles as a silica source and solvent. TS4 works as a catalyst for the hydrolysis of TEOS. Titanium species are found to be isolated in the silica frameworks, supported by DR-UV-vis, FT-IR, ESR, and XPS. The mesoporous structure was verified by XRD, N2 adsorption, and SEM. The results of the catalytic performance for the oxidation reaction of cyclohexene using tert-butoxy hydrogen peroxide (TBHP) as oxidant show that high conversion (29%) of cyclohexene and selectivity (98%) of cyclohexene oxide are realized for the Ti-containing mesoporous silica with Si/Ti ratios of 28 and 51.

Graphical abstract: A novel route for preparation of Ti-containing mesoporous silica with high catalytic performance by using a molecular precursor tetrakis(tris-tert-butoxysiloxy)titanium

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Article information

DOI
https://doi.org/10.1039/C2TA01369J
Article type
Paper
Submitted
22 Sep 2012
Accepted
11 Dec 2012
First published
12 Dec 2012

J. Mater. Chem. A, 2013,1, 2485-2494

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A novel route for preparation of Ti-containing mesoporous silica with high catalytic performance by using a molecular precursor tetrakis(tris-tert-butoxysiloxy)titanium

K. Choi, T. Yokoi, T. Tatsumi and K. Kuroda, J. Mater. Chem. A, 2013, 1, 2485 DOI: 10.1039/C2TA01369J

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