▎ 摘 要
The assembly of two-dimensional (2D) transition-metal oxides and reduced graphene oxide (RGO) has shown great potential in photocatalysis, energy storage, and photoelectric devices. In the work, we present a 3-aminopropyltriethoxysilane (APTES)-induced interfacial assembly route for preparation of a new type of 2D TiO2@RGO hybrid nanostructure. Benefiting from the electrostatic interaction between APTES and RGO, followed by the hydrolysis of APTES, an ultrathin SiO2 layer is first well grown into the surface of RGO. Subsequently, ultrathin TiO2 nanosheets (about 4nm in thickness) are uniformly decorated onto the surface of silica-modified RGO. These robust TiO2 nanosheets interconnect each other and form a unique net-like architecture. Significantly, the TiO2@RGO products show superior structural stability. Consequently, the TiO2@RGO product annealed at 750 degrees C demonstrates an excellent photocatalytic activity and a good cycling life for degradation of organic dyes such as methyl orange (MO), rhodamine B (RhB) and methyl blue (MB) owing to the unique construction and enhanced synergistic effect.