Electrospun Fibrous Ag-Graphene-TiO 2 with Enhanced Photocurrent Response under Visible-Light Illumination

A highly-uniform nanofiber of Ag-graphene-TiO 2 was successfully fabricated by the electrospinning technique, which exhibited significantly increased visible light absorption (λ > 420 nm) and improved photocurrent response. The Ag nanoparticles (AgNPs) and graphenes located in TiO 2 fibers induced an increase in the visible-light photocurrent response. The photocurrent density of Ag-graphene-TiO 2 fibers is 4-fold higher than the pristine TiO 2 fibers under visible light. The increased photocurrent response in visible light region is resulted from the strong interaction between TiO 2 fibers and graphene sheets, as well as the localized surface plasmon resonance of AgNPs.