Abstract
TiO2 nanofiber film (TiO2 NFF) with visible light scattering ability was successfully synthesized by an ethylene glycol-assisted hydrothermal method, Au nanoparticles (Au NPs) were then deposited on the surface of TiO2 film using microwave-assisted chemical reduction process, and at last, Bi2MoO6/Au/TiO2 ternary photocatalytic film was successfully synthesized via a simple alcohol-thermal method using Au/TiO2 nanofilms as templates. The photocatalytic activities of as-fabricated samples were investigated by the oxidation of organic pollutants, like methylene blue (MB) and phenol, and the reduction of aqueous Cr(VI) under visible light. It shows that the Bi2MoO6/Au/TiO2 composite displays a much higher visible-light-responsive photocatalytic performance compared to pure TiO2, Au/TiO2 NFF, and Bi2MoO6/TiO2 complex. The improved visible light photoactivity could be ascribed to the excellent light scattering structure of TiO2 NFF, the surface plasmon resonance effect of Au NPs, and the highly effective separation of photogenerated electrons and holes through the Z-scheme Bi2MoO6/Au/TiO2 system, in which Au NPs plays a key role in transmitting charges in the photocatalytic process.
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