(Cu,S)-ZnO纳米材料光电化学性能的研究

Photoelectrochemical Properties of(Cu,S)-ZnO Nanomaterials

采用水热法制备纯ZnO、Cu-ZnO、S-ZnO及(Cu,S)-ZnO纳米粒。通过X射线衍射(XRD)仪和扫描电子显微镜(SEM)对其晶型结构和表面形貌进行表征分析。利用电化学工作站测定其电化学性能。此外,以亚甲基兰溶液模拟废水,研究其光电催化性能。结果表明,掺杂剂的加入并没有改变其晶体结构,但晶粒尺寸明显变小,表面积增大,表面分布较为均匀。掺杂后,电极的电催化活性明显提高。其中,(Cu,S)-ZnO纳米粒的电化学性能最好,对亚甲基兰溶液的降解率最高,可达87.69%。

Pure ZnO,Cu-ZnO,S-ZnO and(Cu,S)-ZnO nanoparticles were prepared by hydrothermal method.The crystal structure and surface morphology were characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM).The electrochemical properties of electrodes were measured using an electrochemical workstation.Furthermore,the methylene blue solution was used to simulate wastewater to study its photoelectrochemical property.The results show that the addition of dopant does not change the crystal structure,but the grain size decreases significantly,the surface area increases,and the surface distribution is more unifo rm.The electrocatalytic activity of the electrode is significantly increased after doping.Among them,(Cu,S)-ZnO nanoparticles has the best electrochemical properties and the highest degradation rate of methylene blue solution,up to 87.69%.