以SnCl4.Ti(OBu)4、氨水、乙醇为原料，采用活性层包覆法，制备出TiO2/SnO2复合光催化剂，并用IR、XRD、TEM和BET等手段对样品进行了表征.研究其对有机磷农药敌敌畏的光催化降解效果，与单一半导体催化剂SnO2、TiO2做了简单对比.结果表明：所制TiO2/SnO2样品为包覆型结构，由锐钛矿型TiO2金红石型SnO2组成，与SnO2及TiO2晶体粉末相比所制TiO2/SnO2包覆粒子光催化活性得到明显提高.
Nanoparticles of SnO2 coated with TiO2 have been prepared fromTi(OC4H9)4 and SnCl4.5H2O as precursors by an activated surface method. Their morphology and structures were investigated by IR, XRD, TEM and BET. The results indicated the nanometer TiO2/SnO2 was composed of anatase TiO2 and rutile SnO2. The TiO2/SnO2 showed a better catalytic activity than SnO2 and TiO2 alone in photocatalytic degradation of dichlorvos.
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