Preparation and Photocatalytic Activity of Photocatalyst Ag-X(Br, I) /BiVO4 for Acid Orange 7 under Visible Light

Ag-X (Br, I) modified BiVO4 composite photocatalysts were prepared by hydrothermal synthesis and chemical deposition method. The prepared photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis diffuse reflectance spectra techniques (UV-vis). The photocatalytic performance of Ag-X (Br, I)/BiVO4 photocatalysts was evalutated by the degradation of Acid Orange 7 under visible -light irradiation (X>420nm). It was found that the doping of Ag-X (Br, I) could greatly improve the catalytic degradation performance for Acid Orange 7. The AgBr/BiVO4 composite catalyst presented a high photocatalytic activity with degradation efficiency of 92.96% for acid orange 7 after 80 min under visible -light irradiation.