制备条件对La^(3+)掺杂BiPO_4光催化性能的影响  

Effects of preparation process on photocatalytic activity of La^(3+) doped BiPO_4

作　　者：全玉莲[1] 

机构地区：[1]中国环境管理干部学院,河北秦皇岛066102

出　　处：《化学研究与应用》2016年第4期516-520,共5页Chemical Research and Application

基　　金：河北省高等学校科学技术研究项目(QN20131032)资助;中国环境管理干部学院科研基金项目(20130115)资助

摘　　要：采用水热合成法在不同温度、时间、溶剂条件下制备了La^(3+)掺杂BiPO_4光催化剂,利用X射线衍射(XRD)、扫描电镜(SEM)技术对样品的结构和形貌进行了表征。以亚甲基蓝为目标污染物,探讨了不同条件合成的La^(3+)-BiPO_4的光催化性能。结果表明:水热温度和时间、溶剂对合成La^(3+)-BiPO_4的晶体结构、结晶度、晶粒尺寸等因素有较大的影响。在水热温度为200℃、时间为3h,溶剂为水的条件下制备的La^(3+)-BiPO_4对亚甲基蓝的降解效果最好,紫外光照90min后降解率达到95%。La^（3＋）-doped BiPO_4 photocatalysts were fabricated via a hydrothermal process with different hydrothermal temperatures,time,and different solvents.The structures and morphologies of the samples were analyzed by XRD and SEM.The photocatalytic activities were evaluated by the degradation of methylene blue.It is found that reaction time and temperature,solvent content influence the structure,crystallinity and grain size of the products.The photocatalytic activities of the La^（3＋）-BiPO_4 prepared at 200℃ and 3h is the best while the solvent is water,the degradation efficiency of methylene blue in 90 min reaches 95%under the UV light irradiation.

关 键 词：水热合成法 镧掺杂 磷酸铋 光催化 

分 类 号：O644.1[理学—物理化学] O643.36[理学—化学]