Photoanode with Enhanced Performance Achieved by Coating BiVO4 onto ZnO-Templated Sb-Doped SnO2 Nanotube Scaffold
| Autor: | Jing Zhang, Yang Yang, Pratap M. Rao, Lite Zhou |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Scaffold
Nanotube Materials science Nanostructure business.industry Doping Nanotechnology 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Core (optical fiber) Sphere packing Coating engineering Optoelectronics General Materials Science 0210 nano-technology business Electrical conductor |
| Zdroj: | ACS Applied Materials & Interfaces. 9:11356-11362 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.7b01538 |
| Popis: | 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 ... |
| Databáze: | OpenAIRE |
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