Surface characteristics of hydrous silica-coated TiO2 particles

被引：167

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

页码：194 / 198

页数：5

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