焙烧温度对固相法制备BiYO_3可见光催化剂的影响  

Effects of calcination temperature on BiYO_3 photocatalyst prepared by solid-state reaction

作　　者：秦祖赠[1] 刘自力[1,2] 葛利[1] 杨克迪[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广州大学化学化工学院,广东广州510006

出　　处：《工业催化》2010年第11期31-35,共5页Industrial Catalysis

基　　金：国家自然科学基金资助项目(20466001);广西大学科研基金资助项目(XBZ090780);广西大学科学技术研究重点项目(2004ZD01)

摘　　要：以Y_2O_3和Bi_2O_3为原料,采用固相反应制备了BiYO_3可见光催化剂,用热分析、X射线衍射、N_2吸附-脱附、紫外-可见漫反射光谱和拉曼光谱等方法对催化剂进行表征,并以可见光催化降解甲基橙染料废水为探针反应,研究了焙烧温度对BiYO_3的结构及可见光催化活性的影响。研究表明,750℃焙烧的BiYO_3的活性较高,700℃焙烧的催化剂中还存在少量的Bi_2O_3及Y2_O_3,使其光催化活性不高,800℃焙烧的催化剂存在一定的烧结现象,使其比表面积较小,影响其光催化活性。BiYO3 photocatalyst was prepared by solid state reaction using Y203 and Bi203 as raw materials and characterized by thermal analyzer, X-ray diffractometer, N2 physical adsorption-desorption, UV-visible diffuse reflectance spectrometer, Raman spectrometer. Effects of calcination temperature on the structure and visible light catalytic activity of BiYO3 were investigated using photocatalytic degradation of methyl orange wastewater as a probe reaction. The results showed that BiYO3 catalyst calcined at 750 ℃ exhibited better photocatalytie activity; Very small amount of Bi203 and Y203 was found in BiYO3 catalyst calcined at 700 ℃ and resulted in lower photocatalytic activity; The surface area of BiYO3 catalyst calcined at 800 ℃ was reduced due to catalyst sintering, which affected its photocatalytic activity.

关 键 词：催化化学 焙烧温度 钇酸铋 可见光照 光催化降解 甲基橙 

分 类 号：O643.36[理学—物理化学] TQ426.6[理学—化学]