Well鈥揝teered Charge鈥揅arrier Transfer in 3D Branched CuxO/ZnO@Au Heterostructures for Efficient Photocatalytic Hydrogen Evolution
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- 作者：Gang Zhou ; Xiaoyong Xu ; Tao Ding ; Bing Feng ; Zhijia Bao ; Jingguo Hu
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2015
- 出版时间：December 9, 2015
- 年：2015
- 卷：7
- 期：48
- 页码：26819-26827
- 全文大小：580K
- ISSN：1944-8252
文摘
Multi-component hetero-nanostructures exhibit multifunctional properties or synergistic performance and are thus considered as attractive materials for energy conversion applications. There is a long-standing demand to construct more sophisticated heterostructures for steering charge-carrier flow in semiconductor systems. Herein we fabricate a large-scale quantity of three-dimensional (3D) branched CuxO/ZnO@Au heterostructure consisting of CuO nanowires (NWs) and grafted ZnO nanodisks (NDs) decorated with Au nanoparticles via sequential hierarchical assemblies. This treelike hetero-nanostructure ensures well-steered transfer of photogenerated electrons to the exposed ZnO NDs, while holes to the CuO backbone NWs with concerted efforts from multi-node p鈥搉 junctions, polar ZnO facets, and Au plasmon, resulting in the significantly enhanced photocatalytic hydrogen evolution performance.