Anodic growth of hierarchically structured nanotubular ZnO architectures on zinc surfaces using a sulfide based electrolyte

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• 作者：Nabeen K. Shrestha ; Kiyoung Lee ; Robert Hahn ; Patrik Schmuki
• 关键词：Anodization ; ZnO ; Hierarchical ; Nanotubes
• 刊名：Electrochemistry Communications
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：34
• 期：Complete
• 页码：9-13
• 全文大小：1585 K

文摘

We report on the formation of self-organized nanotubular oxide structures by anodization of zinc in a sulfide based electrolyte. Under optimized experimental conditions, successful growth of a several micrometer long self-organized tubular structure is achieved. The anodized samples were characterized using FE-SEM, XPS, XRD and SAED. The key to formation of tubular ZnO is a protective sulfide containing initial layer. In contrast to other self-ordered tubular geometries, ZnO anodic layers consist of a particular tube wall structure. The resulting double hierarchy layers show a considerable efficiency for photoelectrochemical splitting of water when used in a sacrificial polysulfide electrolyte.