点燃温度对溶液燃烧合成BiVO_4超细粉体及其光催化性能影响  

Effect of Igniting Temperature on Ultrafine BiVO_4 Synthesized by Solution Combustion Method and Its Photocatalytic Performance

作　　者：李家科[1] 刘欣[1] 程凯[1] 赵学国[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,江西景德镇333403

出　　处：《陶瓷学报》2016年第1期76-80,共5页Journal of Ceramics

摘　　要：以Bi(NO_3)_3·5H_2O、NH_4VO_3和C_(12)H_(22)O_(11)为原料,采用溶液燃烧法合成BiVO_4超细粉体。利用XRD、SEM和分光光度计等测试方法,研究了点燃温度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:当点燃温度较低时(300℃和400℃),合成粉体由单斜相和四方相BiVO_4组成;当点燃温度较高时(500℃和600℃),由单斜相BiVO_4组成。在点燃温度为500℃条件下,合成BiVO_4粉体具有最佳的光催化性能,在高压汞灯照射240 min,对亚甲蓝溶液(10 mg/L)的降解率为55.7%,且光催化反应符合一级动力学方程。BiVO_4 ultrafine powder was prepared by solution combustion method using Bi（NO_3）_3·5H_2O, NH_4VO_3 and C_（12）H_（22）O_（11） as raw materials. The effects of igniting temperature on phase composition, microstructure and photocatalytic performance of the synthesized powder were studied by means of XRD, SEM and spectrophotometer. The results show that at low igniting temperatures（300 ℃ and 400 ℃）, the as-synthesized BiVO_4 consists of monoclinic and tetragonal phases, and at higher igniting temperatures（500 ℃ and 600 ℃）, BiVO_4 consists of monoclinic phase. Photocatalytic results show that BiVO_4 synthesized at the igniting temperature of500 ℃owns the best photocatalytic performance, and the photodegradation efficiency of methylene blue（10 mg/L） reaches 55.7% under high pressure mercury lamp irradiation for 240 min, and the photocatalytic reactions accord with the first order kinetics equation.

关 键 词：溶液燃烧法 点燃温度 物相组成 光催化性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]