磷钨酸铋微波固相合成及其光催化消除甲醇  

Microwave solid-phase synthesis of bismuth phosphotungstate nanoparticle catalysts and photocatalytic elimination of methanol

作　　者：吴湘江[1] 廖玉超[1] 王贤文[2] 彭振山[1] 蒋耀辉[1] 刘雄义[1] 蔡铁军[1] 

机构地区：[1]湖南科技大学化学化工学院,湘潭411201 [2]中国地质大学材料科学与化学工程学院,武汉430074

出　　处：《环境科学学报》2008年第5期965-970,共6页Acta Scientiae Circumstantiae

基　　金：湖南省自然科学基金(No.05JJ30143);湖南省有机重点学科项目~~

摘　　要：报道了微波固相合成杂多酸盐催化剂BiPW12O40的新方法,并通过红外、差热-热重、BET比表面、扫描电镜、X粉末衍射、荧光发射光谱等一系列手段对其进行了表征.在紫外光照射下,以有机污染物甲醇的气相光催化消除为模型反应,考察了催化剂的光催化活性.扫描电镜结果表明,通过该方法合成的BiPW12O40催化剂粒径为15-30 nm.在紫外光照射下,0.15 g催化剂可将初始浓度为1.40 g.m^-3、流速为3mL.min-1的甲醇气体完全消除.其光催化活性明显优于H3PW12O40,对光催化降解有机气相污染物具有一定的应用前景.The heteropolycompound photocatalyst BiPWI2 040 was prepared by microwave radiation solid phase synthesis. The catalyst was characterized by IR, TG-DTA, BET, SEM, XRD, and PL. The photocatalytic elimination of methanol was used as a model reaction to evaluate the photoeatalytic activity of BiPW12O40 under ultraviolet light irradiation. The results from SEM reveal that the average particle size of BiPW12O40 is 15 -30 nm . When the concentration of methanol is 1.40g·m^3 and the flow rate is 3 mL·min^-1, the elimination of methanol is completed over 0. 15 g BiPW12O40 catalyst. Compared with H3 PW12O40 , the photocatalytic activity of BiPW12O40 is enhanced. The catalyst has a promising application in the photocatalytic degradation of organic contaminants.

关 键 词：微波合成 磷钨杂多酸 铋 光催化 甲醇 

分 类 号：X511[环境科学与工程—环境工程]