Fabrication of TiO2 Nanosheet Aarrays/Graphene/Cu2O Composite Structure for Enhanced Photocatalytic Activities

摘要

TiO~(2) NSAs/graphene/Cu~(2)O was fabricated on the carbon fiber to use as photocastalysts by coating Cu~(2)O on the graphene (G) decorated TiO~(2) 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~(2) NSAs/graphene/Cu~(2)O 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 Cu~(2)O which will reduce the recombination. Third, the TiO~(2) nanosheet can provide more favorable carrier transportation channel which can reduce the recombination of carriers. Finally, the Cu~(2)O can extend the light absorption range.