硅藻土负载Ce-TiO2光催化材料的制备及性能研究

采用低温燃烧法制备硅藻土负载Ce-TiO2光催化材料，借助XRD，SEM对样品进行表征.以罗丹明B溶液为目标污染物，研究并确定了负载型光催化材料的最佳制备和光催化降解条件.结果表明，TiO2光催化材料的最佳煅烧温度为600℃，最佳Ce掺杂量为02%，制备的样品为锐钛矿和金红石组成的混合晶型，且锐钛矿占主要部分.最佳的光催化降解条件为:罗丹明B溶液初始质量浓度为10mg/L，催化剂用量为10g/L，溶液pH=9.制得的复合光催化材料失活再生后降解率可达93%，且可多次重复使用，光催化性能明显优于纯TiO2光催化材料.

Preparation and Performance Research of Ce-TiO2/Diatomite Photocatalytic Materials

The Ce TiO2/diatomite photocatalytic materials were prepared by low temperature combustion synthesis(LCS) method， which were characterized by XRD and SEM. The optimized photocatalytic preparation and degradation conditions of the supported photocatalytic materials were studied and determined， which selected Rhodamine B solution as the target pollutants. The results showed that the optimized calcination temperature was 600℃ and the optimized amount of doped Ce was 02%. The prepared samples were composed of anatase and rutile mixed polymorphs， and the anatase accounted for the major part. The optimized photocatalytic degradation conditions were Rhodamine B solution with initial concentration of 10mg/L， the amount of catalyst of 10g/L and the solution pH of 9. The degradation rate of the composite photocatalyst materials after deactivation and regeneration was 93%， and can be used repeatedly. Its photocatalytic performance was much better than that of the pure TiO2 photocatalytic material.