▎ 摘　　要

In this work, graphene oxide-BiVO4 (GO-BiVO4) composite is firstly prepared via in situ hydrothermal reaction and subsequently reduced graphene oxide (rGO)-BiVO4 is obtained with annealing in N-2 atmosphere. rGO-BiVO4 composite/BiVO4 films electrodes for photoelectrochennical (PEC) cell working electrode are prepared by a doctor blade method onto fluorine-doped tin oxide (FTO) coated glass. Compared with pure BiVO4 films, the rGO-BiVO4 film displays enhanced photoelectrochemical properties under visible light illumination, which performs a high photocurrent response of 160 mu A.cm(-2) and a quantum efficiency of over 1.81% (at lambda = 430 nm) by introducing rGO. The enhanced PEC activity of rGO-BiVO4 could be attributed to its larger recombination resistance (R-rec) and longer electron lifetime (tau) leading to the excellent charge transfer characteristic. Moreover, the as-prepared rGO-BiVO4 composite shows excellent photocatalytic activity for the degradation of methylene blue (MB) under visible light illumination, since rGO can enhance the charge separation efficiency and suppress the charge recombination.