摘要
以柠檬酸为络合剂,采用溶胶凝胶法合成了不同Sr掺杂量的LaFeO_3粉体,即La_(1-x)Sr_xFeO_3(x=0、0.2、0.4、0.6、0.8、1.0)复合氧化物.研究了柠檬酸使用量、溶液的p H值、水浴温度等参数对La_(1-x)Sr_xFeO_3前驱体的溶胶及凝胶质量的影响.同时,以亚甲基蓝水溶液作为目标降解物,研究了Sr的掺杂量、焙烧温度、焙烧时间等因素对La_(1-x)Sr_xFeO_3光催化性能的影响.结果表明,La_(1-x)Sr_xFeO_3前驱体的最佳制备条件为:柠檬酸与金属离子的物质的量比为2∶1、溶液的p H为酸性,水浴温度50℃;且当Sr掺杂量为0.4(摩尔分数)、焙烧温度700℃、焙烧时间2 h条件下制备的粉体具有较好的光催化性能,其降解率高达85.8%.
The different Sr doping La（1-x）SrxFeO3 powders（ x = 0,0. 2,0. 4,0. 6,0. 8,1.0） were prepared by sol- gel method with citric acid as complexing agent. The effect citric acid content,solution pH value,water bath temperature on sol and gel quality of La（1-x）SrxFeO3 precursor were studied. Meanwhile,the influence of Sr doping amount,calcination temperature,calcination time on photodegradation methylene blue aqueous under irradiation were investigated. The optimized preparation conditions of La（1-x）SrxFeO3 precursor are citric acid and metal ion molar ratio of 2∶ 1,the acidic pH solution,and water bath temperature of50 ℃. The photodegradation rate of La（1-x）SrxFeO3 powders was up to 85. 8% when Sr doping content was 0. 2 calcination temperature was 700 ℃,and calcination time was 2 h.
作者
姜黎明
王东
JIANG Li-ming WANG Dong(School of Food Engineering, Harbin University of Commerce, Harbin 150076,China School of Chemical and Environmental Engineering, Hanshan Normal University, Chaozhou 521041, China)
出处
《哈尔滨商业大学学报（自然科学版）》
CAS
2016年第4期462-464,468,共4页
Journal of Harbin University of Commerce：Natural Sciences Edition
