Sulfated and persulfated TiO2/MCM-41 prepared by grafting method and their acid-catalytic activities for cyclization of pseudoionone

被引：22

作者：

Guo, DS ^{[1
]}

Ma, ZF

Jiang, QZ

Xu, HH

Ma, ZF

Ye, WD

机构：

[1] Shanghai Jiao Tong Univ, Dept Chem Engn, Shanghai 200240, Peoples R China

[2] Nanjing Univ Technol, Coll Chem & Chem Engn, Nanjing 210009, Peoples R China

[3] Zhejiang Pharmaceut Co Ltd, Xinchang Pharmaceut Factory, Xinchang 312500, Peoples R China

来源：

CATALYSIS LETTERS | 2006年 / 107卷 / 3-4期

关键词：

grafted TiO2; sulfate/persulfate promotion; MCM-41; cyclization of pseudoionone;

D O I：

10.1007/s10562-005-0013-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Solid acid catalysts of SO4TiO2/MCM-41 and S2O82/TiO2/MCM-41 were prepared via grafting method and sulfate/persulfate promotion. The catalysts exhibited desirable activity and better selectivity for cyclization reaction of pseudoionone compared to traditional SO42-/TiO2. A combination of XRD, N-2 adsorption-desorption and FTIR spectroscopy indicated that the catalysts possess well-ordered mesostructure, and the grafted TiO2 are in highly dispersed amorphous form rather than crystalline phase. For S2O/TiO2/MCM-41 higher S content and more Bronsted acid sites can be achieved by persulfation, which is favorable for the protons participated cyclization reaction. The similar Si-O-Ti-O-S=O structure of all acid sites on pore surface of the catalysts is attributed to the improvement of selectivity in comparison with SO42-/TiO2.

引用

页码：155 / 159

页数：5

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