CAJ | 학술논문

以聚乙烯吡咯烷酮(PVP)为表面活性剂,通过多元醇法制备Cu2S/T-ZnOw异质结复合材料,利用XRD、FESEM、EDS、XPS和FTIR测试方法对样品进行表征,通过测定甲基橙溶液的光降解率来评价样品的光催化活性.结果表明,在紫外光照射下,Cu2S/T-ZnOw纳米复合材料的光催化性能优于纯氧化锌晶须的.当PVP的浓度为3.0 g/L时,样品的光催化活性最高,在紫外光照射120 min后,甲基橙的降解率为97％.经过4个周期的光催化实验后,Cu2S/T-ZnOw催化剂的光催化活性并没有明显下降,说明该样品具有优异的光稳定性.此外,讨论了Cu2S/T-ZnOw纳米复合材料的光催化机理.
이취을희필각완동(PVP)위표면활성제,통과다원순법제비Cu2S/T-ZnOw이질결복합재료,이용XRD、FESEM、EDS、XPS화FTIR측시방법대양품진행표정,통과측정갑기등용액적광강해솔래평개양품적광최화활성.결과표명,재자외광조사하,Cu2S/T-ZnOw납미복합재료적광최화성능우우순양화자정수적.당PVP적농도위3.0 g/L시,양품적광최화활성최고,재자외광조사120 min후,갑기등적강해솔위97％.경과4개주기적광최화실험후,Cu2S/T-ZnOw최화제적광최화활성병몰유명현하강,설명해양품구유우이적광은정성.차외,토론료Cu2S/T-ZnOw납미복합재료적광최화궤리.
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/r-ZnOw photocatalyst exhibits an excellent photostability.Moreover,the photocatalytic mechanism of the Cu2S/T-ZnOw nanocomposites was also discussed.