Surface characterization of titania-silica composite oxides prepared by rapid hydrolysis

被引：5
|
作者：
Kanai, H [1 ]
Shono, M
Imamura, S
Kobayashi, H
机构：
[1] Kyoto Prefectural Univ, Dept Environm Informat, Sakyo Ku, Kyoto 606, Japan
[2] Kyoto Inst Technol, Dept Chem, Kyoto 606, Japan
[3] Kurashiki Univ Sci & Arts, Coll Sci & Ind Technol, Kurashiki, Okayama 712, Japan
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 1998年 / 130卷 / 1-2期
关键词：
titania-silica; ESR; superoxide radical; sol-gel;
D O I：
10.1016/S1381-1169(97)00211-2
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：
The surface structures of TiO2-SiO2 composite oxides prepared by rapid hydrolysis were characterized by an ESR technique, The g(zz) value of O-2(-) adsorbed on titanium oxides gave a good indication for discriminating between tetrahedral and octahedral Ti sites. The tetrahedral Ti sites which predominates on the surface of low-loaded TiO2-SiO2 is closely related to the selectivity in the epoxidation of 1-octene with tert-butyl hydroperoxide catalyzed by TiO2-SiO2 composite oxides. (C) 1998 Elsevier Science B.V.
引用
收藏
页码：187 / 193
页数：7
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