▎ 摘　　要

Owing to extensive practical applications and fundamental importance, the controllable synthesis of well-faceted anatase TiO2 crystals with a high percentage of reactive facets has attracted increasing attention. Here, a novel visible light responsive graphene (GR)-CuO/TiO2 photocatalyst was successfully synthesized by a simple hydrothermal method. The morphology, structural properties, and photocatalytic performance of GR-CuO/TiO2 were investigated and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectroscopy. In particular, the new photocatalyst GR-CuO/TiO2 exhibited a better performance for the photocatalytic degradation of methylene blue (MO) under visible-light irradiation than pure TiO2 and P25, which may be attributed to efficient reduction of electron-hole pair recombination and an extended spectral response from the UV to the visible region. This work is expected to open up new possibilities for the simple remediation of environmental pollution.