▎ 摘　　要

In recent years, coupling graphene or reduced graphene oxide (RGO) with Ag-based photocatalytic semiconductor materials have received considerable attention owing to their excellent chemical stability, unique electronic structures and their physicochemical properties. In current work, a hierarchical Ag2WO4-reduced graphene oxide (AgGO) visible light-driven photocatalyst was successfully prepared through a facile and effective hydrothermal method. The as-prepared AgGO semiconductor photocatalysts were characterized by X-ray diffraction pattern (XRD), fourier transform infrared spectra (FT-IR), raman spectroscopy, field emission scanning electronmicroscopy (SEM) and ultraviolet-visible (UV-vis) diffuse reflectance spectroscopy (DRS). It is found that the nano-sized Ag2WO4 particles are deposited on the surfaces of RGO. The AgGO exhibited superior photocatalytic activity and stability to bare Ag2WO4 under visible light. The photocatalytic degradations of methyleneblue (MB) over AgGO photocatalyst were investigated. The significantly enhanced photocatalytic activity and stability of AgGO photocatalyst could be attributed to the excellent electron-accepting and transporting properties of RGO. The possible mechanism of photocatalytic activity enhancement was proposed.