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Indexed by:期刊论文

Date of Publication:2008-04-15

Journal:MICROPOROUS AND MESOPOROUS MATERIALS

Included Journals:SCIE、EI

Volume:111

Issue:1-3

Page Number:236-242

ISSN No.:1387-1811

Key Words:composite Ti-HMS/TS-1; mesopore; micropore; synthesis; oxidation

Abstract:A novel Ti-containing meso-microporous composite. molecular sieve, namely Ti-HMS/TS-1, has been successfully synthesized through a two-step crystallization process. The products were characterized by X-ray diffraction, transmission electron microscopy, FT-infrared, UV-visible and N-2 physical adsorption-desorption techniques. The catalytic performances of the composite materials were investigated by means of sulfur compounds oxidation. It has been shown that the Ti-HMS/TS-1 simultaneously possesses a disordered mesoporous phase and a crystalline zeolitic phase and the two phases are composite rather than the physical mixture. UV-visible analysis indicates the existence of framework tetracoordination titanium species (Ti4+). Composite Ti-HMS/TS-1 exhibits excellent activities in the oxidation of both small and bulky molecular sulfur compounds, which is superior to the pure materials of TS-1 and Ti-HMS. (C) 2007 Elsevier Inc. All rights reserved.