负载型钒酸铋的制备及其光催化性能研究  

Preparation and Photocatalytic Properties of Supported BiVO_4 Photocatalyst

作　　者：王喜全[1] 李媛[1] 孙浩 

机构地区：[1]辽宁科技大学化工学院,辽宁鞍山114051 [2]辽宁省台安县环保局,辽宁鞍山114100

出　　处：《安全与环境工程》2016年第1期59-63,69,共6页Safety and Environmental Engineering

摘　　要：以硝酸铋(Bi(NO3)3·5H2O)和偏钒酸铵(NH4VO3)为原料,十六烷基三甲基溴化铵(CTMAB)为软模板剂,硝酸铜(Cu(NO3)2·3H2O)为Cu源,改性粉煤灰作为载体,通过水热合成法在不同pH值条件下制备负载型钒酸铋(Cu-BiVO4)复合光催化剂,并采用X-射线衍射(XRD)和扫描电子显微镜(SEM)对催化剂的晶相和表面形貌进行表征,以罗丹明B(RhB)作为目标降解物,研究了所制备的Cu-BiVO4复合光催化剂的可见光催化活性。结果表明:pH值为9的条件下所制备的Cu-BiVO4复合光催化剂为单斜相BiVO4复合材料,具有树枝形貌,其光催化活性最强;加入粉煤灰后,该复合光催化剂的分散性增加,光催化活性增强,对罗丹明B的去除率可达到91.6%。By using hydrothermal synthesis method, this paper prepares supported BiVO4 （Cu-BiVO4） composite photocatalysts under various pH values, using Bi（NO3 ）3 · 5H2O and NH4 VO3 as the raw material and cetyltrime-thyl ammonium bromide （CTMAB） as the soft template,Cu（NO3）2 · 3H2O as the source of copper and modified fly ash as the carrier. The paper also characterizes the crystalline phase and surface morphology of prepared photo- catalysts by X-ray diffraction （XRD） and scanning electron micrographs （SEM）. Then the paper evaluates the pho- tocatolytic properties of the prepared Cu-BiVO4 composite photocatalysts for degradation of rhodamine B （RhB） under visible-light irradiation. The results reveal that the synthesized BiVO4 composite photocatalyst is found to have the highest photocatalytic activity with the monoclinic structure and branch morphology when pH value is 9% with the addition of fly ash, the dispersion and the photocatalytic activity of the photocatalysts are increased to make the removal rate of RhB up to 91.6%.

关 键 词：水热合成法 负载型钒酸铋 粉煤灰 光催化活性 

分 类 号：X703.1[环境科学与工程—环境工程]