▎ 摘　　要

To enhanced photocatalytic activity of TiO2 nanotubes, graphene was transferred on the surface of TiO2 nanotubes by wet transfer method. The results showed that the introduction of graphene reduced the band gap of composites and inhibited the recombination of photoinduced electrons and holes. Therefore, the degradation rate of the graphene/TiO2 nanotubes composites is about 44% higher than that of the TiO2 nanotubes. It was proved that the photoinduced holes play an important role in the degradation process of methylene blue by trapping experiments. This work provides a new pathway for preparing semiconducting TiO2 based catalysts with enhanced photocatalytic activity.