溶液燃烧合成LaFe_(1-x)Mg_xO_3超细粉体及其光催化性能（英文）  

LaFe_(1-x)Mg_xO_3 Ultrafine Powders Synthesized by Solution Combustion and Its Photocatalytic Performances

作　　者：李家科[1] 刘欣[1] 黄丽群[1] 王艳香[1] 

机构地区：[1]景德镇陶瓷学院材料科学与工程学院,景德镇333403

出　　处：《无机材料学报》2015年第11期1223-1227,共5页Journal of Inorganic Materials

基　　金：International Science&Technology Cooperation Project of China(2013DFA51000);National Natural Science Foundation of China(51462015)

摘　　要：采用溶液燃烧合成Mg2+掺杂LaFeO3超细粉体,并利用XRD、SEM、BET和UV-VIS分析Mg2+掺杂量对合成粉体的物相组成、微观形貌和光催化性能的影响。结果表明:Mg2+取代Fe3+形成LaFe1-xMgxO3(0≤x≤0.2)有限型固溶体。当掺杂量为0.1时(x=0.1),合成粉体具有最大的比表面积(43.46m2/g)和较小粒径(径向和长度方向分别为100nm和150nm),因此具有最佳的光催化性能,在高压汞灯180min照射下,对甲基橙溶液(10mg/L)的降解率达75.2%,与纯LaFeO3的相比,光降解率增加26.5%,且光催化反应符合一级动力学方程。Mg2＋ doped La Fe O3 ultrafine powders were synthesized by solution combustion method. Effects of Mg2＋ doping content on phase composition, microstructure and photocatalytic performances of the synthesized powders were investigated by XRD, SEM, BET, and UV-Vis. The results show that Mg2＋ substitutes for Fe3＋ to form La Fe1-xMgxO3（0≤x≤0.2） limited solid solution. When Mg2＋ doping content is 0.1, La Fe0.9Mg0.1O3 powder has a maximum specific surface area（43.46 m2/g） and smaller particle size（100 nm and 150 nm in diameter and length direction, respectively）. It has the best photocatalytic ability with photodegradation efficiency of 75.2% to methyl orange（10 mg/L） under high-pressure mercury lamp irradiation for 180 min. It increases 26.5% than that of the pure LaF eO 3 under the same experimental conditions, and the reaction may be described as the pseudo first order kinetics equation.

关 键 词：LAFEO3 Mg2+掺杂 溶液燃烧法 光催化性能 

分 类 号：O614[理学—无机化学]