Formation of multifaceted nano-groove structure on rutile TiO2 photoanode for efficient electron-hole separation and water splitting
| Autor: | Can Li, Fengtao Fan, Hui Zhang, Hao Huang, Ruotian Chen, Zhi Liu, Yaling Luo, Xiaoyi Zhan, Ziyu Wang, Hongru Peng, Fan Yang, Yao Xiang, Zheng Peng, Weimin Liu, Qin Zhou, Xin Ou, Guijun Ma, Yong Han |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Materials science
business.industry Surface photovoltage Energy Engineering and Power Technology 02 engineering and technology Electron hole 010402 general chemistry 021001 nanoscience & nanotechnology Solar energy 01 natural sciences 0104 chemical sciences Fuel Technology Rutile Nano Electrochemistry Photocatalysis Water splitting Optoelectronics 0210 nano-technology business Groove (engineering) Energy (miscellaneous) |
| Zdroj: | Journal of Energy Chemistry. 65:19-25 |
| ISSN: | 2095-4956 |
| DOI: | 10.1016/j.jechem.2021.05.007 |
| Popis: | Photoelectrochemical (PEC) water-splitting using solar energy holds great promise for the renewable energy future, and a key challenge in the development of industry viable PEC devices is the unavailability of high-efficient photoanodes. Herein, we designed a TiO2 model photocatalyst with nano-groove pattern and different surface orientation using low-energy Ar+ irradiation and photoetching of TiO2, and significantly improved the intrinsic activity for PEC water oxidation. High-resolution transmission electron microscopy directly manifests that the grooves consist of highly stepped surface with steps and well-crystallized. Transient absorption spectroscopy reveals the groove surface that allows for increased recovery lifetime, which ensures promoted electron-hole separation efficiency. Surface photovoltage directly shows the carrier separation and transportation behaviors, verified by selective photodeposition, demonstrating the groove surface on TiO2 contributes to electron-hole separation. This work proposes an efficient and scalable photoanode strategy, which potentially can open new opportunities for achieving efficient PEC water oxidation performance. |
| Databáze: | OpenAIRE |
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