CAJ | 학술논문

通过溶剂热法制备了具有可见光光催化活性的BiVO4/TiO2-石墨烯复合光催化剂。利用X射线粉末衍射、透射电子显微镜、紫外-可见漫反射光谱和荧光发射光谱对样品进行表征，复合光催化剂的催化活性以模拟太阳光条件下降解水溶液中亚甲基蓝来评价。结果表明：BiVO4/TiO2-石墨烯复合光催化剂在530~800 nm的可见光范围具有很强的吸收峰。石墨烯的引入不仅拓宽了光谱响应范围，而且使得BiVO4和TiO2粒子均匀地分散在石墨烯薄片上，能快速捕获并迁移电子，有效地提高了光生载流子的分离效率，从而提高其光催化活性。
통과용제열법제비료구유가견광광최화활성적BiVO4/TiO2-석묵희복합광최화제。이용X사선분말연사、투사전자현미경、자외-가견만반사광보화형광발사광보대양품진행표정，복합광최화제적최화활성이모의태양광조건하강해수용액중아갑기람래평개。결과표명：BiVO4/TiO2-석묵희복합광최화제재530~800 nm적가견광범위구유흔강적흡수봉。석묵희적인입불부탁관료광보향응범위，이차사득BiVO4화TiO2입자균균지분산재석묵희박편상，능쾌속포획병천이전자，유효지제고료광생재류자적분리효솔，종이제고기광최화활성。
BiVO4/TiO2- graphene ( BiVO4/TiO2- GR ) photocatalysts were prepared by a facile solvothermal method. The composite photocatalysts were characterized by X-ray diffraction, transmission electron microscopy, UV-Vis diffuse reflectance spec-trometry, and photoluminescence spectrometry. The photocatalytic activity was evaluated by degradation of methylene blue ( MB ) under simulated sunlight irradiation. It is found that the composite photocatalysts have a strong absorption peak in the 530-800 nm range of visible light. The introduction of graphene not only enlarges the absorption range of visible light, but also makes BiVO4 and TiO2 particles disperse uniformly in graphene sheets, and can capture and transfer the photogenerated charges, leading to an efficient improvement in photocatalytic activity.