摘要
采用酸性溶胶法制备掺铁-TiO2/膨润土复合光催化剂,利用XRD、IR等测试手段对其进行了表征。通过测试甲基橙溶液的脱色率和COD去除率对复合光催化剂的光催化活性进行了评价。结果表明,该催化剂有较高的催化氧化性能,在太阳光照射下,对pH=4、质量浓度为20mg/L的甲基橙溶液进行降解时,其脱色率可达95%以上,COD去除率可达85%以上。该催化剂在经过200℃焙烧活化2.5h后可多次重复利用。
Iron doping TiO2/bentonite composite photocatalyst were prepared by sol-gel method. XRD and IR analysis were used to detect these samples. The photocatalytic properties of these samples were detected by decoloration rate of methyl orange solution and COD. It indicated that the photocatalytic properties of this kind of photocatalyst were prominent. The decoloration rate of 20 mg/L methyl orange solution at pH=4 under visible light could reach to 95% with COD more than 85%. Moreover, this catalyst could be reused several times after sintering at 200℃ for 2.5 h.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2007年第1期204-208,共5页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金项目(50574043)
吉林省科技厅资助项目(20040329)
关键词
复合光催化剂
膨润土
脱色率
COD
composite photocatalyst
bentonite
decoloration rate
COD
