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论文类型：期刊论文

发表时间：2008-04-15

发表刊物：MICROPOROUS AND MESOPOROUS MATERIALS

收录刊物：SCIE、EI

卷号：111

期号：1-3

页面范围：236-242

ISSN号：1387-1811

关键字：composite Ti-HMS/TS-1; mesopore; micropore; synthesis; oxidation

摘要：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.