Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 22    No. 7    July 2012

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Fabrication and photocatalytic properties of Cu2S/T-ZnOw heterostructures via simple polyol process
WU De-zhi, FAN Xi-mei, TIAN Ke, DAI Jia, LIU Hua-rong

Key Laboratory of Advanced Technologies of Materials of Ministry of Education,
School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China

Abstract:The Cu2S/tetrapod-like ZnO whisker (T-ZnOw) heterostructures were successfully synthesized via a simple polyol process employing the poly(vinyl pyrrolidone) (PVP) as a surfactant. The as-prepared heterostructures were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR). The photocatalytic properties of Cu2S/T-ZnOw nanocomposites synthesized with different PVP concentrations were evaluated by photodegradation of methyl orange (MO) under UV irradiation. The results show that the Cu2S/T-ZnOw nanocomposites exhibit remarkable improved photocatalytic property compared with the pure T-ZnOw. The sample prepared with 3.0 g/L PVP shows an excellent photocatalytic property and the highest photodegradation rate of MO is 97% after UV irradiation for 120 min. Besides, the photocatalytic activity of the photocatalyst has no evident decrease even after four cycles, which demonstrates that the Cu2S/T-ZnOw photocatalyst exhibits an excellent photostability. Moreover, the photocatalytic mechanism of the Cu2S/T-ZnOw nanocomposites was also discussed.

 

Key words: Cu2S/T-ZnOw heterostructure; photocatalytic property; Cu2S nanoparticle

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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