表面Au改性增强ZnO光阳极性能实验设计  

Experimental design of surface Au modification to enhance the performance of ZnO photoanode

作　　者：顾修全[1] 欧雪梅[1] 陈正[1] GU Xiuquan;OU Xuemei;CHEN Zheng(School of Materials Science and Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116)

机构地区：[1]中国矿业大学材料与物理学院,江苏徐州221116

出　　处：《首都师范大学学报（自然科学版）》2022年第5期65-70,96,共7页Journal of Capital Normal University：Natural Science Edition

基　　金：中国矿业大学教学研究项目(2020ZX21)。

摘　　要：设计了一种新型的半导体光电化学性能实验,该光电化学系统是由ZnO纳米棒阵列光阳极、Pt对电极、饱和甘汞参比电极以及电解液构成.首先,运用水热法在氟掺杂氧化锡(FTO)导电基体材料上生长结构有序的ZnO纳米棒阵列,然后采用光沉积的方法在ZnO纳米棒表面沉积适量纳米Au颗粒得到Au/ZnO纳米棒阵列.通过扫描电子显微镜分析材料的微观形貌,利用紫外-可见光漫反射吸收光谱、光电化学和电化学阻抗谱等方法测试分析ZnO光电极材料的各项性能.证实了通过在ZnO阵列上负载合适浓度的Au颗粒会显著改善其光电响应,降低其界面电荷转移电阻.该实验不仅能培养本科生严谨的科学研究态度,而且能开发其创新潜能,提高其解决复杂工程问题的能力.A new experiment of semiconductor photoelectrochemical(PEC)property is designed. The PEC system is composed of ZnO nanorod array photoanode,Pt counter electrode,saturated calomel electrode and electrolyte. Firstly,ZnO nanorod arrays with ordered structure were grown on fluorine doped tin oxide(FTO)conductive substrate by hydrothermal method,and then Au/ZnO nanorod arrays were obtained by an appropriate amount of nano Au particles were deposited on the surface of ZnO nanorods by photodeposition method. The microstructure of the materials was analyzed by scanning electron microscope,and the properties of ZnO photoelectrode materials were tested and analyzed by UV-Vis diffuse reflection absorption spectroscopy, photoelectrochemistry and electrochemical impedance spectroscopy. It was confirmed that loading Au particles with appropriate concentration on ZnO nanorod arrays would significantly improve its photoelectric response and reduce its interfacial charge transfer resistance. The experiment can not only cultivate the rigorous scientific research attitude of undergraduates,but also develop their innovative potentials and enhance their abilities to solve complex engineering problems.

关 键 词：光电化学 水热法 ZNO 纳米棒阵列 

分 类 号：TM23[一般工业技术—材料科学与工程]