Ag_3PO_4/BiOBr光催化剂的制备与可见光活性研究  

Preparation of Ag_3PO_4/BiOBr Catalysts and Their Photocatalytic Activities under Visible Light Irradiation

作　　者：谭侨 朱玮[1] 魏琪[1] 林志奎 聂龙辉[1,2] 

机构地区：[1]湖北工业大学化学化工学院,湖北武汉430068 [2]湖北省催化材料协同创新中心,湖北武汉430068

出　　处：《广东化工》2015年第19期5-7,共3页Guangdong Chemical Industry

基　　金：湖北省大学生创新训练项目(201310500017);湖北省教育厅科技研究计划中青年项目(Q20121403);国家自然科学基金(51572074)

摘　　要：先采用水热法制备具有分等级结构的BiOBr微球,然后采用沉积-沉淀法将Ag3PO4负载于BiOBr微球表面。采用扫描电子显微镜、X-射线粉末衍射仪、N2吸脱附等温线和紫外-可见漫反射光谱对所制备的样品进行了测试表征;将Ag3PO4/BiOBr微球用于可见光催化分解甲基橙溶液,考察了Ag3PO4的负载量及重复使用对可见光(>420nm)催化活性影响的研究。结果表明:Ag3PO4/BiOBr微球具有分等级介孔-大孔结构,Ag3PO4与载体BiOBr间结合紧密。单纯BiOBr微球几乎没有可见光催化活性,负载Ag3PO4后表现出较好的可见光催化活性,其中以Ag3PO4(50%)/BiOBr样品的催化效果最佳,30min内将近90%的甲基橙被降解,该催化剂样品在重复实验中表现出较好光催化稳定性。tlerarchical BiOBr microspheres were firstly prepared by hydrothermal method, and then AgsPO4 was deposited on their surface by dcposition-precipitation nlethod. The prepared samples were characterized by scanning electronic microscopy （SEM）, X-ray powder diffraction （XRD）, N2 adsorption and desorption isotherms and UV-Vis diffuse reflectance spectroscopy. Their photocatalytic activities were evaluated by degrading Methyl Orange （MO） solution under visible-light irradiation （γ〉420 nm）, and thc effects of Ag3PO4 loading amount and reuse on catalytic activity were investigated. The results indicate that Ag3PO4/BiOBr is of hierarchical meso-/macroporous structure. The Ag3PO4 particles are well combined with the support of BiOBr. The BiOBr sample nearly shows no activity. After Ag3PO4 deposited, the prepared Ag3PO4/BiOBr samples all show good visible-light photocatalytic activities. Among them, the Ag3PO4（50 %）/BiOBr show the best catalytic activity and around 90 % MO can be degraded in 30 min. And this sample shows a stable photocatalytic activity in repeated test.

关 键 词：Ag3PO4/BiOBr 光催化 多相催化 

分 类 号：O647.3[理学—物理化学]