用溶胶-凝胶法制备了不同TiO2含量的TiO2/MCM-41光催化剂,以罗丹明B为模拟有机污染物,对催化剂的光催化脱色性能进行了考察.用XRD、UV-Vis漫反射、N2吸附等方法对光催化剂进行了表征,结果表明:TiO2/MCM-41的比表面积和孔体积随TiO2含量的增加而减小,TiO2/MCM-41负载型催化剂上TiO2平均晶粒尺寸比纯TiO2的小.20% TiO2/MCM-41的光生电子-空穴分离效应最高,且光催化脱色活性最高.光催化反应体系中h+是主要的活性自由基,TiO2/MCM-41的光催化活性由材料的吸附能力和所含TiO2的光催化性能共同决定.
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