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.
出处
《钢铁钒钛》
CAS
北大核心
2009年第2期17-21,共5页
Iron Steel Vanadium Titanium
关键词
TIO2
褐铁矿
负载
光催化
降解
TiO2
limonite
loaded
photocatalysis
degradation
