化工进展2017，Vol.36Issue(8)：3125-3133,9.DOI:10.16085/j.issn.1000-6613.2016-2363
Ce-TiO2-SiO2的制备及其光降解罗丹明B的动力学
Preperation of Ce-TiO2-SiO2 and the kinetics of RhB photodegradation
摘要
Abstract
The photocatalysts ofx％Ce-TiO2/SiO2 (x=0,0.1,0.3,0.5,0.8,1,mass fraction)were prepared with Si(OC2H5)4,Ti(OC2Hs)4 and Ce(NO3)3·6H2O as precursors via a sol-gel method.The XRD date showed that thermal stability of TiO2 can be improved by introducing Cerium and SiO2 into it,and phase transformation from anatase to rutile can be inhibited effectively.The analysis results of XPS and FTIR showed that chemical bonds are formed between TiO2 and SiO2 by the appearance of Si-O-Ti and Si-O-Si bonds in 0.3％ Ce-TiO2/SiO2.The result of SEM and BET showed that 0.3％Ce-TiO2/SiO2 has smaller particle size,more uniform size distribution and larger specific surface area (194.98m2/g) than pure TiO2.The Rh B was used as the target pollutant,and effects of cerium content on photodegradation efficiency of Ce-TiO2/SiO2 were studied under the condition of ultraviolet light and visible light irradiation.The results showed that the TiO2 10％ SiO2 and 0.3％ Ce has the best photo-degradation performance.The degradation efficiency could reach to 99％ and 78％ after reaction for 30min under the ultraviolet light and 180min visible light irradiation,respectively.Compared to P25 (8％),the removal rate (41％) of TOC of 0.3 ％Ce-TiO2/SiO2 showed higher degaradation of phenol.关键词
二氧化钛/二氧化硅/动力学/溶胶凝胶法/催化剂Key words
titanium dioxide/kinetics/silica dioxide/sol-gel method/catalyst分类
化学化工引用本文复制引用
樊国栋,张国贤,冯昕钰,张光华..Ce-TiO2-SiO2的制备及其光降解罗丹明B的动力学[J].化工进展,2017,36(8):3125-3133,9.基金项目
陕西省科技攻关项目(2014K08-12)、陕西省教育厅重点实验室科研计划(14JS015)及陕西科技大学研究生创新基金项目. （2014K08-12）
