以TiCl4为钛源,NaOH为沉淀剂,采用水解-沉淀法制备出云母负载纳米TiO2光催化剂(TiO2/M),采用TG,XRD,SEM,UV等手段对所制备的粉体进行了性能表征;并以日光色镝灯为光源,研究了催化剂对甲基橙的光降解活性.讨论了材料制备过程中焙烧温度、光催化剂添加量、重复次数对光降解甲基橙活性的影响.结果表明:纳米TiO2物相为锐钛矿相和金红石相混晶,平均晶粒尺寸为10～30 nm,颗粒在云母表面形成均匀牢固的包覆层,制备的云母负载纳米TiO2光催化剂对200～370am的紫外光有较高的吸收率.经400℃焙烧2 h制备的光催化剂以5 g/L加入时,60 min对甲基橙的降解率达到80%;相同条件下重复利用3次,60 min对甲基橙的降解率仍然可高达49%.
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