TiO_2负载光催化剂的制备与结构性能研究  

Study on Preparation and Structure Properties of Limonite/TiO_2 Composite Photocatalysis Agent

作　　者：杜金逵[1] 龚文琪[1] 饶波琼[1] 韩沛[1] 

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070

出　　处：《钢铁钒钛》2009年第2期17-21,共5页Iron Steel Vanadium Titanium

摘　　要：用sol-gel法制备褐铁矿/TiO2光催化剂,通过XRD、SEM测试表征和降解实验表明,褐铁矿/TiO2光催化剂在褐铁矿颗粒表面负载上一层较为均匀的TiO2膜,且核/膜结构结合较为牢固;在pH=4、光催化剂投加量5 g/L、光照时间为2 h时,CODC r去除率达到70%(由251 mg/L降为78.3 mg/L),具有较好的降解效果;此光催化剂经重复利用后样品回收率较高,催化活性仍较好。Limonite/TiO2 composite photocatalysis agent was prepared by sol-gel method in this paper.The XRD,SEM measurement and characterization and the degradation treatment experiments showed that, it had been loaded with a homogeneous TiO2 film on its surface, and it had a firm nuclear/membrane structure, the removal rate of CODCr attained 70% after treatment and the residual CODCr was about 78.3 mg/L as compared with 251 mg/L under the condition of pH = 4,catalyst dosage of 5 g/L and illumination time of 2 h, so it had better degradation effect, it also had superior recovery rate and better photocatalysis properties after recycle experiments.

关 键 词：TIO2 褐铁矿 负载 光催化 降解 

分 类 号：O643.36[理学—物理化学]