Surface characteristics of hydrous silica-coated TiO2 particles

被引：165
|
作者：
Lin, YL [1 ]
Wang, TJ [1 ]
Jin, Y [1 ]
机构：
[1] Tsing Hua Univ, Dept Chem Engn, Beijing 100084, Peoples R China
来源：
POWDER TECHNOLOGY | 2002年 / 123卷 / 2-3期
关键词：
titanium dioxide; coating silica; surface modification;
D O I：
10.1016/S0032-5910(01)00470-3
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The surface characteristics of hydrous silica-coated TiO2 particles are experimentally studied. Different analytical techniques were used to characterize the Si oxide coatings on TiO2 particles. The high-resolution transmission electron microscope (HRTEM), zeta-potential analyzer and X-ray photoelectron spectroscope (XPS) analyses show that hydrous silica is continuously coated on the surface of TiO2 particles. From the chemical shift of binding energy of O 1s and Ti2p(3/2) on coated particles and FTIR analyses of absorption band, it is inferred that Si oxide in the coating film is combined onto TiO2 particle surface through chemical bond of Ti-O-Si. The electrokinetic behavior of TiO2 particles can be modified significantly by dense film coating. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：194 / 198
页数：5
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