▎ 摘　　要

In general, graphene-TiO2 composites as well as 3D hydrogels are almost prepared by using P25 or organic titanium. However, due to the valuableness of P25 and the toxic of organic titanium, the development of graphene-TiO2 only limited to scientific research. Herein, we reported the development of three-dimensional graphene-TiO2 hydrogels by a facile one-pot hydrothermal approach and explored its environmental applications as photocatalyst. During the hydrothermal reaction, the graphene nanosheets and TiO2 particles self-assembled into 3D interconnected networks, in which the spherical nanostructured TiO2 particles with uniform size were densely anchored onto the graphene nanosheets. We have shown that the resultant graphene-TiO2 hydro gels displayed the synergistic effects of the assembled graphene nanosheets and TiO2 particles and therefore exhibited a unique collection of physical and chemical properties such as increased adsorption capacities, enhanced photocatalytic activities.