Interfacial Assembly of Robust TiO₂ Nanosheets Onto Silica‐Modified Reduced Graphene Oxide for Highly Efficient Degradation of Organic Dyes

Abstract 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 4 nm 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 °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.