Fabrication of TiO Nanosheet Aarrays/Graphene/CuO Composite Structure for Enhanced Photocatalytic Activities.

TiO NSAs/graphene/CuO was fabricated on the carbon fiber to use as photocastalysts by coating CuO on the graphene (G) decorated TiO nanosheet arrays (NSAs). The research focus on constructing the composite structure and investigating the reason to enhance the photocatalytic ability. The morphological, structural, and photocatalytic properties of the as-synthesized products were characterized. The experimental results indicate that the better photocatalytic performance is ascribed to the following reasons. First, the TiO NSAs/graphene/CuO composite structure fabricated on the carbon cloth can form a 3D structure which can provide a higher specific surface area and enhance the light absorption. Second, the graphene as an electron sink can accept the photoelectrons from the photoexcited CuO which will reduce the recombination. Third, the TiO nanosheet can provide more favorable carrier transportation channel which can reduce the recombination of carriers. Finally, the CuO can extend the light absorption range.