Design of sandwich-structured ZnO/ZnS/Au photoanode for enhanced efficiency of photoelectrochemical wate splitting

作     者：Yichong Liu Yousong Gu Xiaoqin Yan Zhuo Kang Shengnan Lu Yihui Sun Yue Zhang 

作者机构：State Key Laboratory for Advanced Metals and Materials School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China Key Laboratory of New Energy Materials and Technologies University of Science and Technology Beijing Beijing 100083 China 

基　　金：国家973计划 the Major Project of International Cooperation and Exchanges 国家教育部高等学校学科创新引智计划项目 国家自然科学基金 the Research Fund of Co-Construction Program from Beijing Municipal Commission of Education the Fundamental Research Funds for the Central Universities 国家教育部长江学者与创新团队发展计划 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2015年第8卷第9期

页      码：2891-2900页

摘      要：We developed and demonstrated a ZnO/ZnS/Au composite photoanode with significantly enhanced photoelectrochemical water-splitting performance, con- taining a ZnS interlayer and Au nanoparticles. The solar-to-hydrogen conversion efficiency of this ZnO/ZnS/Au heterostructure reached 0.21%, 3.5 times that of pristine ZnO. The comparison of the incident photon-to-current efficiency （IPCE） and the photoresponse in the white and visible light regions further verified that the enhancement resulted from contributions of both UV and visible light. The modification of the Au NPs was shown to improve the photoelectrochemical （PEC） performance to both UV and visible light, as modification encouraged effective surface passivation and surface-plasmon- resonance effects. The ZnS interlayer favored the movement of photogenerated electrons under UV light and hot electrons under visible light, causing their injection into ZnO; this simultaneously suppressed the electron-hole recombination at the photoanode-electrolyte interface. The optimized design of the interlayer within plasmonic metal/semiconductor composite systems, as reported here, provided a facile and compatible photoelectrode configuration, enhancing the utilization efficiency of incident light for photoelectrochemical applications.

主 题 词：ZnO,ZnS,Au,photoanode,photoelectrochemicalwater splitting 

学科分类：07[理学] 

核心收录：

D　O　I：10.1007/s12274-015-0794-y

馆 藏 号：203813057...