用溶胶-凝胶法制备Ce-Mn储氧材料,并于该储氧材料上分别负载光催化剂TiO2和贵金属Pt制备出Pt-TiO2/CeO2-MnO2复合催化剂.用X射线衍射、X射线能谱分析、程序升温还原和漫反射紫外-可见光谱等技术对复合催化剂进行了表征,并以光热催化降解气相苯评价了复合催化剂的活性.结果表明,Mn分别进入到TiO2和CeO2的晶格中形成固溶体;Pt均匀分散在复合催化剂表面;Ce-Mn储氧材料在250℃下具有较好的储氧性能;复合催化剂对紫外及可见光的吸收较强;1.6%Pt-40%TiO2/CeO2-MnO2复合催化剂的活性较高,光热催化10 h时,苯降解率可达94.5%.
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