摘要
采用水热法制备具有高效可见光催化性能的BiVO_(4)/Bi_(2)Fe_(4)O_(9)复合光催化剂,通过SEM、XRD等一系列表征手段对样品进行了形貌和结构的表征。最后通过在一定的条件下降解目标污染物亚甲基蓝(MB)溶液对催化剂的光催化性能进行了探究。结果表明:BiVO_(4)以100~500 nm颗粒状形态均匀的修饰在片状Bi_(2)Fe_(4)O_(9)的表面。当BiVO_(4)的修饰量为15%时,光催化剂在可见光下对MB溶液的降解效率最高,高达51.92%。通过对照实验发现BiVO_(4)/Bi_(2)Fe_(4)O_(9)的催化效率比Bi_(2)Fe_(4)O_(9)单体高了4.45倍,比BiVO_(4)单体高了1.29倍。另外,根据实验结果对BiVO_(4)/Bi_(2)Fe_(4)O_(9)在可见光下降解MB的反应机理进行了预测。
BiVO_(4)/Bi_(2)Fe_(4)O_(9)composite photocatalyst with high visible light photocatalytic performance was prepared by hydrothermal method,the morphology and structure of the samples were characterized by SEM and XRD.Finally,the photocatalytic performance of the catalyst was investigated by degrading the target pollutant methylene blue(MB)solution under certain conditions.The result showed that BiVO_(4) was uniformly modified on the surface of flaky Bi_(2)Fe_(4)O_(9)in the form of 100~500 nm particles.When the modified amount of BiVO_(4) was 15%,the photocatalytic degradation efficiency of MB solution under visible light was the highest,reaching 51.92%.Compared with Bi_(2)Fe_(4)O_(9)monomer,the catalytic efficiency of BiVO_(4)/Bi_(2)Fe_(4)O_(9)was 4.45 times higher and 1.29 times higher than that of BiVO_(4) monomer.In addition,according to the experimental results,the reaction mechanism of MB degradation by BiVO_(4)/Bi_(2)Fe_(4)O_(9)under visible light was predicted.
作者
林双龙
王腾娇
次立杰
周二鹏
周娟
LIN Shuang-long;WANG Teng-jiao;CI Li-jie;ZHOU Er-peng;ZHOU Juan(College of Chemical Technology,Shijiazhuang University,Hebei Shijiazhuang 050035,China)
出处
《广州化工》
CAS
2022年第15期60-64,共5页
GuangZhou Chemical Industry
基金
河北省自然科学基金青年基金(No:B2021106003)
河北省高等学校青年拔尖人才计划项目(No:BJ2021097)
石家庄市科学技术研究与发展计划项目(No:201240373A,No:191070781)
石家庄学院博士科研启动基金项目(No.20BS003)。
