Abstract:
BiVO
4/TiO
2-graphene(BiVO
4/TiO
2-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 spectrometry,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 BiVO
4 and TiO
2 particles disperse uniformly in graphene sheets,and can capture and transfer the photogenerated charges,leading to an efficient improvement in photocatalytic activity.