Photoanode with Enhanced Performance Achieved by Coating BiVO4 onto ZnO-Templated Sb-Doped SnO2 Nanotube Scaffold.
Photoanode with Enhanced Performance Achieved by Coating BiVO4 onto ZnO-Templated Sb-Doped SnO2 Nanotube Scaffold.
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DOI：
10.1021/acsami.7b01538
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发表时间：
2017-03
影响因子：
9.5
通讯作者：
Lite Zhou;Yang Yang-Yang;Jing Zhang-;P. Rao
中科院分区：
文献类型：
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作者：
Lite Zhou;Yang Yang-Yang;Jing Zhang-;P. Rao
BiVO 4光阳极的性能，特别是在正面照明下，受到BiVO 4适度的电荷传输特性的限制。由BiVO 4涂覆到导电支架上组成的核/壳纳米结构是改善BiVO 4基光阳极性能的有前途的途径。在这里，我们调查光阳极组成的薄而均匀的层BiVO 4颗粒涂覆到Sb掺杂的SnO 2（Sb：SnO 2）纳米管阵列，使用可控的长度和填充密度的牺牲ZnO模板合成。我们证明了一个新的记录的产品的光吸收和电荷分离效率（ηabs × ηsep）的57.3和58.5%的正面和背面照明下，分别在0.6 VRHE。此外，这两个高ηabs × ηsep效率都是在没有任何额外处理或故意掺杂BiVO 4的情况下实现的。这些结果表明，Sb：SnO 2纳米管芯与其他成功的策略（如掺杂和氢处理）的集成可以提高BiVO 4和相关半导体的性能，使其更接近其理论潜力。
The performance of BiVO4 photoanodes, especially under front-side illumination, is limited by the modest charge transport properties of BiVO4. Core/shell nanostructures consisting of BiVO4 coated onto a conductive scaffold are a promising route to improving the performance of BiVO4-based photoanodes. Here, we investigate photoanodes composed of thin and uniform layers of BiVO4 particles coated onto Sb-doped SnO2 (Sb:SnO2) nanotube arrays that were synthesized using a sacrificial ZnO template with controllable length and packing density. We demonstrate a new record for the product of light absorption and charge separation efficiencies (ηabs × ηsep) of ∼57.3 and 58.5% under front- and back-side illumination, respectively, at 0.6 VRHE. Moreover, both of these high ηabs × ηsep efficiencies are achieved without any extra treatment or intentional doping in BiVO4. These results indicate that integration of Sb:SnO2 nanotube cores with other successful strategies such as doping and hydrogen treatment can increase the performance of BiVO4 and related semiconductors closer to their theoretical potential.