Preparation and characterization of silica-modified titanium dioxide nanoparticles by co-precipitation method

被引：13

作者：

Li, ZJ

Hou, B

Xu, Y

Wu, D

Sun, YH ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

ACTA PHYSICO-CHIMICA SINICA | 2005年 / 21卷 / 03期

关键词：

titanium dioxide nanoparticles; silica; co-precipitation; photocatalytic;

D O I：

10.3866/PKU.WHXB20050301

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：

Silica-modified titanium dioxides were prepared by co-precipitation method and then characterized by XRD, FT-IR, XPS, TEM, and UV-Vis absorption spectroscopy. The results showed that there was a strong interaction between SiO2 and TiO2, and Ti-O-Si bonds formed on silica-modified titanium dioxide surfaces. The addition of silica in TiO2 particle could effectively suppress the formation of rutile phase, the decrease of surface area and the growth of titanium dioxide crystals. The band-gap transition increased with the increase of silica content. In comparison with pure TiO2 nanoparticles, the silica-modified TiO2 nanoparticles exhibited better photocatalytic activity, and the activity increased with the silica content.

引用

页码：229 / 233

页数：5

共 13 条

[1] Improved photocatalytic activity and characterization of mixed TiO2/SiO2 and TiO2/Al2O3 materials [J].