文献类型：期刊文献

中文题名：SnO_2-TiO_2复合颗粒的形态结构及其光催化活性

英文题名：Morphological Structure and Photocatalytic Activities of SnO_2-TiO_2 Composite Particles

作者：施利毅[1,2];李春忠[3];古宏晨[3];房鼎业[4]

机构：[1]上海大学理学院化学系;[2]华东理工大学技术化学物理研究所,上海200237;[3]华东理工大学技术化学物理研究所;[4]华东理工大学技术化学物理研究所化工系

年份：2000

卷号：13

期号：3

起止页码：336

中文期刊名：Chinese Journal of Chemical Physics

外文期刊名：化学物理学报（英文）

收录：CSTPCD;;Scopus;CSCD:【CSCD2011_2012】；

基金：国家九五攻关项目!96-554-02;国家自然科学基金!29636010

语种：中文

中文关键词：复合颗粒;二氧化钛;二氧化锡;光催化剂

外文关键词：Composite particles, Photocatalytic oxidation, Titania

摘要：在气溶胶反应器中，利用TiCl4高温氧化反应制备超细TiO2采用均匀沉淀法在TiO2表面沉积SnO2，制备SnO2－TiO2复合颗粒，应用TEM、EDS、XRD、BET比表面积测试等手段对粒子进行表征．以活性艳红X－3B溶液为处理对象，考察复合颗粒的光催化活性．结果表明SnO2－TiO2复合颗粒的光催化活性较纯气相合成超细TiO2有较大提高，SnO2最佳含量为15.3％，SnO2－TiO2复合颗粒光催化活性的提高归因于不同能级半导体之间光生载流子的输运和分离．
Ultrafine titania particles were prepared by gas-phase oxidation of titanium tetrachloride in a high temperature tubular gas-phase reactor. The homogencous precipitation method was used to prepare SnO2-TiO2 composite particles. The composite particles were characterized by TEM, EDS, XRD and BET surface area. The synthesized composite particles,pure ultrafine TiO2 commercial TiO2 and pure SnO2 were employed for photocatalytic degradatinn of azo dye active red X-3B in aerated solution. The result showed that a rapid and decolorization of the azo dye was achieved, and the photoactivity of the composite particles was higher than that of the pure ultrafine TiO2 and commercial TiO2, and the optimum loading of SnO2 on TiO2 is 15.3%. The enhanced degradation rate of X-3B using SnO2-TiO2 composite particles was attributed to increased charge separation in these systems.