Abstract
Abstract ZnO nanorod arrays (NRAs) co-loaded with Au nanoparticles (NPs) and reduced graphene oxide (RGO) are fabricated using a simple one-step electrochemical deposition method. The obtained photocatalysts were characterized by field emission scanning electron microscopy, X-ray diffractometer, photoluminescence and UV–vis absorption spectra. The photocatalytic activity of the as-prepared samples was investigated by degradation of methylene blue under visible light irradiation. The results showed that Au/RGO–ZnO NRAs exhibited much higher photocatalytic activity than RGO–ZnO NRAs, Au–ZnO NRAs and pure ZnO NRAs. The synergistic effect of Au NPs and RGO enhances visible light absorption range and transmits the hot electrons more efficiently. This research will encourage more rational design of efficient visible light responsive photocatalysts.
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