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Visible light photocatalytic activity of nitrogen-doped La2Ti2O7 nanosheets originating from band gap narrowing
Abstract
Approximately 15 nm thick nitrogen-doped lanthanum titanate (La2Ti2O7) nanosheets with a single-crystalline perovskite structure have been prepared by hydrothermal processing and subsequent heat treatment in NH3 at 600 °C. Doping nitrogen into the La2Ti2O7 nanosheets results in the narrowing of the band gap, extending the light absorption into the visible light region (∼495 nm). The nitrogen-doped La2Ti2O7 nanosheets not only show significant visible light photocatalytic activity toward the decomposition of methyl orange but also exhibit enhanced the ultraviolet light photocatalytic activity. The enhancement of photocatalytic activity originates from the narrowing of the band gap of La2Ti2O7 nanosheets. The results obtained show that the desirable route to extend the photocatalytic activity of a semiconductor from the ultraviolet to the visible light region is to narrow the band gap rather than to create localized mid-gap states.
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Citations
Cites
Photocatalysis on TiO2 Surfaces: Principles, Mechanisms, and Selected Results
Linsebigler, A. L., Lu, G., & Yates, J. T. (1995) · Chemical Reviews · doi:10.1021/cr00035a013 · Cited by 11,575
Cited by
Photocatalytic Activity Enhanced by Plasmonic Resonant Energy Transfer from Metal to Semiconductor
Cushing, S. K., Li, J., Meng, F., Senty, T. R., Suri, S., Zhi, M., Li, M., Bristow, A. D., & Wu, N. (2012) · Journal of the American Chemical Society · doi:10.1021/ja305603t · Cited by 1,243
Self-citationMeng, F., Li, J., Cushing, S. K., Zhi, M., & Wu, N. (2013) · Journal of the American Chemical Society · doi:10.1021/ja404851s · Cited by 643
Self-citationLi, J., Cushing, S. K., Zheng, P., Senty, T., Meng, F., Bristow, A. D., Manivannan, A., & Wu, N. (2014) · Journal of the American Chemical Society · doi:10.1021/ja503508g · Cited by 586
Self-citationSolar-to-fuels conversion over In2O3/g-C3N4 hybrid photocatalysts
Cao, S.-W., Liu, X.-F., Yuan, Y.-P., Zhang, Z.-Y., Liao, Y.-S., Fang, J., Loo, S. C. J., Sum, T. C., & Xue, C. (2014) · Applied Catalysis B: Environmental · doi:10.1016/j.apcatb.2013.10.029 · Cited by 458
Polymer-supported titanium dioxide photocatalysts for environmental remediation: A review
Singh, S., Mahalingam, H., & Singh, P. K. (2013) · Applied Catalysis A: General · doi:10.1016/j.apcata.2013.04.039 · Cited by 438
Metadata
- Authors
- Meng, F., Hong, Z., Arndt, J., Li, M., Zhi, M., Yang, F., & Wu, N.
- Venue
- Nano Research
- Publisher
- Tsinghua University Press
- Published
- 2012-02-15
- Volume
- 5
- Issue
- 3
- Pages
- 213-221
- ISSN
- 1998-0000 (ISSN-L)
- 1998-0124
- OpenAlex
- W1999601666
- Cited by
- 216
- References
- 1
- FWCI
- 8.99
- Type
- journal article
- Language
- en
- Open access
- closed
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- Meng, F., Hong, Z., Arndt, J., Li, M., Zhi, M., Yang, F., & Wu, N. (2012). Visible light photocatalytic activity of nitrogen-doped La2Ti2O7 nanosheets originating from band gap narrowing. Nano Research. https://doi.org/10.1007/s12274-012-0201-x
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