▎ 摘　　要

Photocatalysis comprises an immense interest for resolving current energy and environmental problems by converting sun light into chemical energy. Here, we developed FeVO4/graphene nanocomposites by using a facile hydrothermal method and characterized the product through powder X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectrometry, UV-visible spectroscopic analysis, Brunauer-Emmett-Teller, photoluminescence spectroscopy and electrochemical impedance spectroscopy. The visible light-assisted photocatalytic activeness was determined by decomposition of methylene blue (MB) dye solution. The outcomes show that the FeVO4/graphene nanocomposites exhibit enhanced photocatalytic efficiency for the oxidization of MB on a maximum degradation removal rate of decolonization 92% while compared with pure FeVO4 nanocomposite (63%). This is attributed to enhanced light absorption capacity, long lifetime of photo-generated charge carriers in FeVO4/graphene nanocomposite and the greater surface area which allow greater extent of adsorption of dye molecules at the catalyst surface. The possible photocatalytic degradation mechanism of FeVO4 and FeVO4/graphene was proposed and critically discussed.