Effects of coating parameters on the morphology of SiO2-coated TiO2 and the pigmentary properties

被引：55

作者：

Liu, Yumin ^{[1
]}

Ge, Chen ^{[1
]}

Ren, Min ^{[1
]}

Yin, Hengbo ^{[1
]}

Wang, Aili ^{[1
]}

Zhang, Dongzhi ^{[1
]}

Liu, Chunyan ^{[1
]}

Chen, Jun ^{[1
]}

Feng, Hui ^{[1
]}

Yao, Hengping ^{[1
]}

Jiang, Tingshun ^{[1
]}

机构：

[1] Jiangsu Univ, Fac Chem & Chem Engn, Zhenjiang, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2008年 / 254卷 / 09期

关键词：

rutile TiO2; SiO2; island-like coating; uniform coating; pigmentary property;

D O I：

10.1016/j.apsusc.2007.10.021

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：

SiO2-coated TiO2 powders were prepared by the chemical deposition method starting from rutile TiO2 and Na2SiO3. The SiO2-coated TiO2 powders were characterized by X-ray photoelectron spectroscopy, Zeta-potential analysis, Fourier transform infrared spectroscopy, and transmission electron microscopy. The evolution of island-like and uniform coating layers was found to depend upon the ratio of Na2SiO3 to TiO2, reaction temperature, and pH. The whiteness and brightness of the SiO2-coated TiO2 powders increased in response to an increase in the SiO2 loading, but there was a maximum value among the light scattering indexes. The SiO2-coated TiO2 powders possessed more negative Zeta potentials than the naked TiO2. The dispersibility of the SiO2-coated TiO2 powders with the continuous and uniform SiO2 coating layers was higher than that of the naked TiO2 and the SiO2-coated TiO2 powders with the island-like SiO2 coating layers. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：2809 / 2819

页数：11

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