ZnSe/CdS/CdSe Triple-Sensitized ZnO Nanowire Arrays for Multi-Bandgap Photoelectrochemical Hydrogen Generation
ZnSe/CdS/CdSe Triple-Sensitized ZnO Nanowire Arrays for Multi-Bandgap Photoelectrochemical Hydrogen Generation
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DOI：
10.1039/c4ra08335k
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发表时间：
2014-09
期刊：
影响因子：
3.9
通讯作者：
Hang Xu;R. Mo;Chuanwei Cheng;Guanjie Ai;Qian Chen;Sui Yang;Hongxing Li;J. Zhong
中科院分区：
文献类型：
--
作者：
Hang Xu;R. Mo;Chuanwei Cheng;Guanjie Ai;Qian Chen;Sui Yang;Hongxing Li;J. Zhong
自从发现通过光电化学（PEC）从n型TiO 2电极分解水来析氢以来，结合一维（1D）金属氧化物纳米线（NW）阵列（例如，TiO 2和ZnO）以提高其可见光收获效率的方法已经被广泛研究。在这项研究中，ZnSe/CdS/CdSe三重敏化ZnO NW阵列成功地制作FTO衬底上通过一个简单的水热和阴离子交换反应，然后通过化学浴沉积（CBD）的方法。通过这些复合纳米结构中核心ZnO NW和不同光敏化外层之间的太阳能的有效协同光吸收和多类型-II渐变带隙水平，实现了光化学转换性能的显著增强。在这项工作中用于材料生产的形态发生策略是低成本但有效的，并且可以扩展到制备具有精细纹理特征的其他核-多壳纳米结构。
Since the discovery of hydrogen evolution through the photoelectrochemical (PEC) splitting of water from n-type TiO2 electrodes, the technology of short-bandgap semiconductors (such as ZnSe, CdS and CdSe) combined with one-dimensional (1D) metal-oxide nanowire (NW) arrays (e.g., TiO2 and ZnO) to enhance their visible-light harvest efficiency has been widely studied. In this study, ZnSe/CdS/CdSe triple-sensitized ZnO NW arrays were successfully fabricated on FTO substrates via a facile hydrothermal and anion exchange reaction, followed by a chemical bath deposition (CBD) approach. Through the effective synergistic light absorption of the solar energy and the multi-type-II graded bandgap level between the core ZnO NW and the different photosensitization out layers in these composite nanostructures, a remarkable enhancement in photochemical conversion performance was achieved. The morphogenetic strategy used for the material production in this work is low-cost but effective, and it could be extended to prepare other core–multishell nanostructures with elaborate textural characteristics.