SnO2-TiO2复合颗粒的形态结构及其光催化活性

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、ＥＥＤＳ、ＳＲＤ、ＢＥＴ比表面积测试等手段对粒子进行表征。以活性艳红Ｘ－３Ｂ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

Morphological Structure and Photocatalytic Activities of SnO2-TiO2 Composite Particles

Ultrafine titania particles were prepared by gas-phase oxidation of titanium tetrachloride in a high temperature tubular gas-phase reactor.The homogeneous 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 degradation 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.