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 w...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.展开更多
基金Project (2009AA03Z427) supported by the High-tech Research and Development Program of ChinaProject (2006z02-006-3) supported by the Science Foundation of Sichuan Province,China
文摘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.