Improved photoelectrochemical performance by forming a ZnO/ZnS core/shell nanorod array

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2019,（4）
• 页码范围: 241-244
• 页数: 4页
• 语种: 英文
• DOI: 10.1007/s11801-019-8162-x

摘要

ZnO nanorod arrays (NRAs) were prepared via a facile hydrothermal method for photoelectrochemical (PEC) applications.Then,ZnS thin shell layers were deposited onto them via a facile hydrothermal treatment process for constructing a ZnO/ZnS core/shell structure.It was demonstrated that the PEC activity of a ZnO NRA is enhanced significantly after the surface modification,although there weren't any obvious changes in the visible-light harvesting efficiency.Both the Nyquist and Mott-Schottky (M-S) plots were employed to reveal the reason,which was attributed to higher electrocatalytic activity of ZnS than that of ZnO and the resulting higher charge transfer efficiency across the solid/liquid interfaces.Finally,a schematic band model was proposed for clarifying the charge carrier transfer mechanism occurred at the interfaces.