Preparation and Photocatalytic Properties of Cu2S/Tetrapod-Like ZnO Whisker Nanocomposites

doi:10.1016/S1872-2067(11)60380-X

Abstract

Abstract: Nanocomposites of tetrapod-like ZnO whisker (T-ZnOw) with loaded Cu₂S were synthesized with different Cu/Zn molar ratios with the assistant of poly(vinyl pyrrolidone) (PVP) by the polyol process. The composite samples were characterized by X-ray diffraction, field emission scanning electron microscopy, X-ray photoelectron spectroscopy, and UV-visible diffuse reflectance spectroscopy. The photocatalytic activities for the Cu₂S/T-ZnOw nanocomposites increased with Cu/Zn molar ratio up to 4%, and then decreased with further increase of the Cu/Zn molar ratio up to 10%. The Cu₂S/T-ZnOw nanocomposites exhibited higher activity than T-ZnOw for the photocatalytic degradation of methyl orange. Recycling experiments were also performed. The photocatalytic activity of the photocatalyst showed no decrease after three cycles, which demonstrated that the Cu₂S/T-ZnOw photocatalyst had excellent stability.

Key words: zinc oxide, copper sulphide, polyol method, photocatalytic performance, methyl orange

WU De-Zhi, FAN Xi-Mei, DAI Jia, LIU Hua-Rong, LIU Hong, ZHANG Feng-Zhang. Preparation and Photocatalytic Properties of Cu2S/Tetrapod-Like ZnO Whisker Nanocomposites[J]. Chinese Journal of Catalysis, 2012, 33(5): 802-807.

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