自制Cu-Bi_2WO_6的表征及其对苯酚的光催化降解  

Characterization of Self-made Cu-Bi_2WO_6 and Its Application to Photocatalytical Degradation of Phenol

作　　者：高晓明[1,2] 付峰[1] 吕磊[1] 武玉飞[1] 王静[1] 李稳宏[2] 

机构地区：[1]延安大学化学与化工学院陕西省化学反应工程重点实验室,陕西延安716000 [2]西北大学化工学院,陕西西安710069

出　　处：《化工环保》2012年第2期181-184,共4页Environmental Protection of Chemical Industry

基　　金：陕西省自然科学基金资助项目(2011JM2007)

摘　　要：采用水热反应法制备Cu改性的Bi2WO6催化剂(Cu-Bi2WO6)。采用XRD仪和紫外-可见光漫反射吸收光谱仪对自制Cu-Bi2WO6的结构进行了表征。考察了光催化降解工艺对Cu-Bi2WO6在可见光下催化氧化降解苯酚效果的影响。实验结果表明:自制Cu-Bi2WO6的吸收边带出现了明显红移,对可见光的利用率较Bi2WO6强;当水热反应pH为0.6时,Cu-Bi2WO6的光催化性能最好;在空气通入量为250 mL/min、Cu-Bi2WO6加入量为1.0 mg/L的条件下,光照反应210 min后苯酚降解率可达92.0%。The Cu-doped Bi2WO6（Cu-Bi2WO6） was prepared by hydrothermal method and characterized by XRD and UV-Vis diffuse reflection absorption spectrometer.The photocatalytical degradation effects of phenol on Cu-Bi2WO6 under visible light were studied.The experimental results show that：The self-made Cu-Bi2WO6 catalyst has a significant red-shift absorption band in the visible region,which indicates that it can use visible light more effectively than Bi2WO6;When the pH in hydrothermal reaction is 0.6,the photocatalytical activity of the Cu-Bi2WO6 is the best;Under the conditions of air flow 250 mL/min,Cu-Bi2WO6dosage 1.0 mg/L and irradiation time 210 min,the degradation rate of phenol can reach 92.0%.

关 键 词：钨酸铋 水热合成 光催化剂 掺杂 改性 苯酚 废水处理 

分 类 号：TQ023[化学工程]