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An Unusual Strong Visible‐Light Absorption Band in Red Anatase TiO2 Photocatalyst Induced by Atomic Hydrogen‐Occupied Oxygen Vacancies
Abstract
Increasing visible light absorption of classic wide‐bandgap photocatalysts like TiO 2 has long been pursued in order to promote solar energy conversion. Modulating the composition and/or stoichiometry of these photocatalysts is essential to narrow their bandgap for a strong visible‐light absorption band. However, the bands obtained so far normally suffer from a low absorbance and/or narrow range. Herein, in contrast to the common tail‐like absorption band in hydrogen‐free oxygen‐deficient TiO 2, an unusual strong absorption band spanning the full spectrum of visible light is achieved in anatase TiO 2 by intentionally introducing atomic hydrogen‐mediated oxygen vacancies. Combining experimental characterizations with theoretical calculations reveals the excitation of a new subvalence band associated with atomic hydrogen filled oxygen vacancies as the origin of such band, which subsequently leads to active photo‐electrochemical water oxidation under visible light. These findings could provide a powerful way of tailoring wide‐bandgap semiconductors to fully capture solar light.
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Wang, Q., Hisatomi, T., Jia, Q., Tokudome, H., Zhong, M., Wang, C., Pan, Z., Takata, T., Nakabayashi, M., Shibata, N., et al. (2016) · Nature Materials · doi:10.1038/nmat4589 · Cited by 1,684
Selective Breaking of Hydrogen Bonds of Layered Carbon Nitride for Visible Light Photocatalysis
Kang, Y., Yang, Y., Yin, L., Kang, X., Wang, L., Liu, G., & Cheng, H. (2016) · Advanced Materials · doi:10.1002/adma.201601567 · Cited by 626
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Cited by
Defect engineering in photocatalytic materials
Bai, S., Zhang, N., Gao, C., & Xiong, Y. (2018) · Nano Energy · doi:10.1016/j.nanoen.2018.08.058 · Cited by 1,236
Role of oxygen vacancy in metal oxides for photocatalytic CO2 reduction
Jiang, W., Loh, H., Low, B. Q. L., Zhu, H., Low, J., Heng, J. Z. X., Tang, K. Y., Li, Z., Loh, X. J., Ye, E., et al. (2023) · Applied Catalysis B: Environmental · doi:10.1016/j.apcatb.2022.122079 · Cited by 401
Formation, Detection, and Function of Oxygen Vacancy in Metal Oxides for Solar Energy Conversion
Wang, Z., Lin, R., Huo, Y., Li, H., & Wang, L. (2022) · Advanced Functional Materials · doi:10.1002/adfm.202109503 · Cited by 384
Self-citationSu, K., Tan, L., Liu, X., Cui, Z., Zheng, Y., Li, B., Han, Y., Li, Z., Zhu, S., Liang, Y., et al. (2020) · ACS Nano · doi:10.1021/acsnano.9b08686 · Cited by 294
Zafar, Z., Yi, S., Li, J., Li, C., Zhu, Y., Zada, A., Yao, W., Liu, Z., & Yue, X. (2022) · ENERGY & ENVIRONMENTAL MATERIALS · doi:10.1002/eem2.12171 · Cited by 284
Metadata
- Authors
- Yang, Y., Yin, L., Gong, Y., Niu, P., Wang, J., Gu, L., Chen, X., Liu, G., Wang, L., & Cheng, H.
- Venue
- Advanced Materials
- Publisher
- Wiley
- Published
- 2018-01-08
- Volume
- 30
- Issue
- 6
- ISSN
- 0935-9648 (ISSN-L)
- 1521-4095
- OpenAlex
- W2782873431
- Cited by
- 330
- References
- 2
- FWCI
- 9.73
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yang, Y., Yin, L., Gong, Y., Niu, P., Wang, J., Gu, L., Chen, X., Liu, G., Wang, L., & Cheng, H. (2018). An Unusual Strong Visible‐Light Absorption Band in Red Anatase TiO2 Photocatalyst Induced by Atomic Hydrogen‐Occupied Oxygen Vacancies. Advanced Materials. https://doi.org/10.1002/adma.201704479
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