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Synthesis of Ti Containing Molecular Sieves Using a Diethoxysiloxane-Ethyltitanate Polymer

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Abstract

Ti-MCM-41 and SiO2–TiO2-xerogel were prepared using a double alkoxide precursor, diethoxysiloxane-ethyltitanate (DESET, 93.75mol Si:6.25mol Ti). Characterization of the materials prepared was carried out using XRD, N2 and water adsorption isotherm, SEM/EDS, TEM analysis, UV–Vis and FT-IR spectroscopies. Catalytic activity was measured for cyclohexene epoxidation using H2O2 as an oxidant. High titanium amounts in tetrahedral coordination in DESET resulted in Ti-MCM-41 with high catalytic activity accompanied by enhanced H2O2 selectivity. It was also possible to prepare TS-1 with MFI structure using DESET as a precursor, but titanium species in the sample were highly unstable and mostly came out from the framework to form large TiO2 clusters upon calcination.

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Authors and Affiliations

  1. School of Chemical Science and Engineering, Inha University, Incheon, Korea, 402-751

    W.J. Kim & W.S. Ahn

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  1. W.J. Kim
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  2. W.S. Ahn
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Correspondence to W.S. Ahn.

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Kim, W., Ahn, W. Synthesis of Ti Containing Molecular Sieves Using a Diethoxysiloxane-Ethyltitanate Polymer. Catalysis Letters 94, 187–191 (2004). https://doi.org/10.1023/B:CATL.0000020544.67088.0d

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  • DOI: https://doi.org/10.1023/B:CATL.0000020544.67088.0d

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