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Oxygen Vacancy Induced Band-Gap Narrowing and Enhanced Visible Light Photocatalytic Activity of ZnO
Abstract
Oxygen vacancies in crystal have important impacts on the electronic properties of ZnO. With ZnO(2) as precursors, we introduce a high concentration of oxygen vacancies into ZnO successfully. The obtained ZnO exhibits a yellow color, and the absorption edge shifts to longer wavelength. Raman and XPS spectra reveal that the concentration of oxygen vacancies in the ZnO decreased when the samples are annealed at higher temperature in air. It is consistent with the theory calculation. The increasing of oxygen vacancies results in a narrowing bandgap and increases the visible light absorption of the ZnO. The narrowing bandgap can be confirmed by the enhancement of the photocurrent response when the ZnO was irradiated with visible light. The ZnO with oxygen vacancies are found to be efficient for photodecomposition of 2,4-dichlorophenol under visible light irradiation.
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Cited by
Asnavandi, M., Yin, Y., Li, Y., Sun, C., & Zhao, C. (2018) · ACS Energy Letters · doi:10.1021/acsenergylett.8b00696 · Cited by 365
Jin, H., Tian, X., Nie, Y., Zhou, Z., Yang, C., Li, Y., & Lu, L. (2017) · Environmental Science & Technology · doi:10.1021/acs.est.7b04503 · Cited by 336
Kong, X. Y., Choo, Y. Y., Chai, S.-P., Soh, A. K., & Mohamed, A. R. (2016) · Chemical Communications · doi:10.1039/c6cc07750a · Cited by 292
Li, Z., Liu, X., Zhou, M., Zhang, S., Cao, S., Lei, G., Lou, C., & Zhang, J. (2021) · Journal of Hazardous Materials · doi:10.1016/j.jhazmat.2021.125757 · Cited by 245
Metadata
- Authors
- Wang, J., Wang, Z., Huang, B., Ma, Y., Liu, Y., Qin, X., Zhang, X., & Dai, Y.
- Venue
- ACS Applied Materials & Interfaces
- Publisher
- American Chemical Society (ACS)
- Published
- 2012-07-23
- Volume
- 4
- Issue
- 8
- Pages
- 4024-4030
- ISSN
- 1944-8244 (ISSN-L)
- 1944-8252
- OpenAlex
- W1995548609
- Cited by
- 1,566
- References
- 5
- FWCI
- 21.72
- Type
- journal article
- Language
- en
- Open access
- closed
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