光催化剂Cu-BiVO_4的制备及其光催化降解含酚废水  

Preparation of Cu-BiVO4 photocatalyst and its application in the treatment of phenol-containing wastewater

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：《化工进展》2012年第5期1039-1042,1087,共5页Chemical Industry and Engineering Progress

基　　金：陕西省自然科学基金项目(2011JM2007)

摘　　要：采用水热法制备了Cu改性的BiVO4催化剂并进行了表征,用于模拟含酚废水的降解。考察了催化剂制备条件和光催化降解工艺对该样品在可见光下催化氧化去除苯酚效果的影响。结果表明,在中性条件下制备的催化剂活性最高,在空气通入量为200 mL/min、催化剂加入量为1 mg/L时,反应180 min后,对含酚废水的去除率最高达92.4%。采用X射线衍射和紫外-可见光谱等表征手段对催化剂的结构性质进行了表征。结果表明,Cu的复合使可见光吸收带发生红移,吸收强度也有较大幅度的提高,当pH=7时,Cu-BiVO4的单斜晶相特征峰的强度最强,晶型较完整。Cu metal modified BiVO4 was prepared by hydrothermal method, which was investigated by photocatalytic oxidation of phenol-containing wastewater. The effects of pH of catalysts prepared and photocatalytic reaction techniques on the removal performance of phenol were studied. The results showed that the degradation rate of Cu-BiVO4 to phenol in wastewater was up to 92.4%, under the condition as, 7 of pH catalysts prepared, 1 mg/L of catalyst dosage, 200 mL/min of air flow, illumination 3 h. The composite photocatalysts were characterized by X-ray diffraction and ultraviolet-visible absorption spectroscopy. The Cu-BiVO4 catalyst has a significant red-shift in the absorption band in visible region, and the absorption intensity increases greatly for the composite catalyst.

关 键 词：Cu-BiVO4 水热合成 光催化 含酚废水 

分 类 号：TQ523.59[化学工程—煤化学工程]