An atomic-scale study of the role of titanium in TiO2:SiO2 sol-gel materials

被引：38

作者：

Walters, JK ^{[1
]}

Rigden, JS ^{[1
]}

Dirken, PJ ^{[1
]}

Smith, ME ^{[1
]}

Howells, WS ^{[1
]}

Newport, RJ ^{[1
]}

机构：

[1] UNIV KENT,DEPT PHYS,CANTERBURY CT2 7NR,KENT,ENGLAND

来源：

CHEMICAL PHYSICS LETTERS | 1997年 / 264卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1016/S0009-2614(96)01359-0

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：

Neutron diffraction data is used to reveal details of the effect of adding titania to a silica-based sol-gel, including a first direct observation of the Ti-O correlation, At low Ti contents the data are consistent with the 4-fold oxygen coordination derived from NMR. Even at these concentrations the silica network is shown to have been affected significantly, with bond-length distributions being narrowed, and with a high level of network-OH indicating a qualitative change in the mesoscopic structure associated with interfacial surfaces, Data on a phase separated sample supports the conclusion that the network-OH is associated with the phase separation process.

引用

页码：539 / 544

页数：6

共 18 条

[1] CHARACTERIZATION OF TITANIA GELS BY O-17 NUCLEAR-MAGNETIC-RESONANCE AND ELECTRON-DIFFRACTION [J].