Titania-silica as catalysts: molecular structural characteristics and physico-chemical properties

被引：628

作者：

Gao, XT ^{[1
]}

Wachs, IE ^{[1
]}

机构：

[1] Lehigh Univ, Dept Chem & Chem Engn, Zettlemoyer Ctr Surface Studies, Bethlehem, PA 18015 USA

来源：

CATALYSIS TODAY | 1999年 / 51卷 / 02期

基金：

美国国家科学基金会;

关键词：

TiO2-SiO2 mixed oxides; TiO2/SiO2 supported oxides; catalyst; glass; sol-gel; multilayers thin films; surface structure; coordination geometry; electronic property; photocatalysis; acidity; epoxidation and oxidation reactions; isomerization and dehydration reactions; EXAFS XANES; UV-Vis DRS; Raman; IR; XPS spectroscopy;

D O I：

10.1016/S0920-5861(99)00048-6

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Recent results on characterization and applications of titania-silica materials as photocatalysts, acid catalysts and oxidation catalysts are reviewed. The similarities and differences in structural characteristics and physico-chemical properties between titania-silica mixed and supported oxides are emphasized. The generation of new catalytic active sites either on the silica surface or in the silica matrix is discussed with respect to the formation of Ti-O-Si bonds and the local structure. The insights obtained from these studies allow a fundamental understanding of the relationships between the structural characteristics and the physico-chemical/reactivity properties of titania-silica catalysts. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：233 / 254

页数：22

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