LaFeO_3的制备及光催化降解酸性品红  

Preparation of LaFeO_3 and Photo-Catalytic Degradation of Acid-Fuchsin

作　　者：张翠红[1] 李江[1] 陈志敏[1] 朱秋芳[1] 

机构地区：[1]太原工业学院化学与化工系,山西太原030008

出　　处：《中北大学学报（自然科学版）》2014年第3期318-321,329,共5页Journal of North University of China(Natural Science Edition)

基　　金：山西省教育厅高校科技开发项目(20091156)

摘　　要：采用溶胶-凝胶法制备了钙钛矿型氧化物LaFeO3,并以其为光催化剂对酸性品红溶液进行了降解.考察了制备过程中络合剂、溶胶脱水温度、焙烧温度对LaFeO3样品催化性能的影响,并对不同焙烧温度下制备出的LaFeO3样品进行了XRD表征.结果表明：在500~700℃下焙烧制得的LaFeO3样品物相均为钙钛矿型,随着焙烧温度的升高,LaFeO3晶粒尺寸增加;用柠檬酸作络合剂,在脱水温度为60℃,焙烧温度为600℃下制得的LaFeO3对20mg/L酸性品红溶液的降解率可达到87.56%.The samples of perovskite oxide LaFeO3 were prepared by means of sol-gel method and were used to degrade acid-fuchsin under light irradiation.The effects of various complexing agents,dehydration temperature from sol and calcination temperature on photo-catalytic activity of the LaFeO3 samples were studied.These samples calcined at different calcination temperature were characterized by XRD.The results indicate that the LaFeO3 samples calcined at between 500℃ to 700℃ are perovskite oxides and the crystal particle size increased with raising calcination temperature.Moreover,from experiments it is found that the efficiency of photo-catalytic degradation of 20mg/L acid-fuchsin can be up to 87.56% using the LaFeO3 prepared at a dehydration temperature of 60℃ and at a calcination temperature of 600℃ by citric acid as complexing agent.

关 键 词：钙钛矿型氧化物 LAFEO3 溶胶-凝胶法 柠檬酸 酒石酸 酸性品红 

分 类 号：O643[理学—物理化学]