Direct synthesis and catalytic activity of ordered large pore titanium-substituted spherical SBA-15 molecular sieves

被引：5

作者：

Chen, Shengwen ^{[1
]}

Ma, Changwen ^{[1
]}

Qin, Minmin ^{[2
]}

Yang, Haifeng ^{[2
]}

Xie, Hongyong ^{[1
]}

Guan, Jie ^{[1
]}

机构：

[1] Shanghai Second Polytech Univ, Sch Urban Dev & Environm Engn, Shanghai 201209, Peoples R China

[2] Shanghai Normal Univ, Sch Biol & Environm Sci, Shanghai 200234, Peoples R China

来源：

REACTION KINETICS MECHANISMS AND CATALYSIS | 2012年 / 106卷 / 01期

关键词：

Titanium; SBA-15; Spherical; Cyclohexene epoxidation; MESOPOROUS SBA-15; OXIDATION; SILICA;

D O I：

10.1007/s11144-012-0426-4

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：

Titanium substituted highly ordered SBA-15 spheres with a diameter about 5 mu m in a ternary P123-H2O-HCl-TEOS system were prepared by the hydrothermal method and the catalytic activity in the epoxidation of cyclohexene was studied. The synthesized materials were characterized by XRD, ICP-AES, FT-IR, BET and SEM, UV-Vis and N-2 adsorption/desorption isotherms. The results show that incorporation of titanium into the framework of SBA-15 makes the surface area, pore diameter and pore volume increase and the pore walls slimmer than pure SBA-15. When the titanium content is above a critical value, TiO2 anatase forms on the material surface. The Ti-SBA-15 materials showed good catalytic activity for the oxidation of cyclohexene. The catalytic activity increases with an increase of Ti content and decreases when anatase TiO2 clusters are formed.

引用

页码：245 / 256

页数：12

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