利用“模板法”结合“真空干燥”技术制备出Ce-TiOx超细粒子,用XRD,TG-DSC,TEM等手段进行表征；以甲基橙溶液的光催化降解测试Ce-TiOx超细粒子的催化活性；考察初始物质的量比及热处理温度对Ce-TiOx超细粒子的结构及光催化活性的影响.结果显示:钛干凝胶经400℃热处理可得结晶度较高的锐钛矿型TiO2,800℃时TiO2转变为金红石相；Ce-Ti干凝胶经800℃热处理可得粒径约为45 nm的类球形颗粒；Ce-TiOx超细粒子中,钛以Ti3 O5,Ti6O11,TiO2等多种形式存在,铈以CeO2和Ce7 O12的形式存在；稀土铈影响Ce-TiOx超细粒子中钛的价态.
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