Synthesis, characterization and photocatalytic properties of titania-modified mesoporous silicate MCM-41

被引：95
作者：
Zheng, S [1 ]
Gao, LA [1 ]
Zhang, QH [1 ]
Guo, JK [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY | 2000年 / 10卷 / 03期
关键词：
D O I：
10.1039/a908799k
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：
A series of titania modified mesoporous silicate MCM-41 (MCM-TiO2) samples with variable Ti/Si ratios have been synthesized from tetrabutyltitanate and calcined MCM-41. The samples were characterized by powder X-ray diffraction (XRD), FTIR spectroscopy, thermal analysis (DTA-TG), nitrogen adsorption-desorption at 77 K, transmission electron microscopy (TEM), and solid state diffuse reflectance UV-VIS spectroscopy. It was found that tetrabutyltitanate cocondensation occurred with pendant OH groups of MCM-41 leading to Si-O-Ti bonds so modifying the inner pore surface of MCM-41 after hydrolysis and calcination. In the titania modified MCM-41 samples, although titania species were in tetrahedral rather than octahedral coordination which is predominant in crystalline titania, it still exhibited good photocatalytic activity for oxidizing phenol to carbon dioxide and water.
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页码：723 / 727
页数：5
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