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Mechanism for Visible Light Responses in Anodic Photocurrents at N-Doped TiO2 Film Electrodes
Abstract
Nitrogen doping of anatase TiO 2 powder extended the photocurrent action spectrum for water oxidation from the UV-light region (≤400 nm) to the visible-light region (≤ ∼550 nm), as reported. Investigations of the effect of the addition of reductants such as methanol, SCN -, Br -, I -, and hydroquinone to the electrolyte have for the first time given clear experimental evidence to the mechanism that visible-light responses for N-doped TiO 2 arise from an N-induced midgap level, formed slightly above the top of the (O-2p) valence band. The investigations, in combination with the above mechanism, have also shown that photocatalytic oxidation of organic compounds on N-doped TiO 2 under visible illumination mainly proceed via reactions with surface intermediates of water oxidation or oxygen reduction, not by direct reactions with holes trapped at the N-induced midgap level.
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Citations
Cites
Electrochemical Photolysis of Water at a Semiconductor Electrode
FUJISHIMA, A., & HONDA, K. (1972) · Nature · doi:10.1038/238037a0 · Cited by 34,169
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Wardman, P. (1989) · Journal of Physical and Chemical Reference Data · doi:10.1063/1.555843 · Cited by 2,123
Photochemical Activity of Nitrogen-Doped Rutile TiO2(110) in Visible Light
Diwald, O., Thompson, T. L., Zubkov, T., Ed. G. Goralski, Walck, S. D., & Yates, J. T. (2004) · The Journal of Physical Chemistry B · doi:10.1021/jp031267y · Cited by 712
Cited by
TiO2 photocatalysis and related surface phenomena
FUJISHIMA, A., ZHANG, X., & TRYK, D. (2008) · Surface Science Reports · doi:10.1016/j.surfrep.2008.10.001 · Cited by 6,737
A review on the visible light active titanium dioxide photocatalysts for environmental applications
Pelaez, M., Nolan, N. T., Pillai, S. C., Seery, M. K., Falaras, P., Kontos, A. G., Dunlop, P. S. M., Hamilton, J. W. J., Byrne, J. A., O'Shea, K., et al. (2012) · Applied Catalysis B: Environmental · doi:10.1016/j.apcatb.2012.05.036 · Cited by 4,047
Surface Science Studies of the Photoactivation of TiO 2 New Photochemical Processes
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Mechanistic Insight into the TiO2Photocatalytic Reactions: Design of New Photocatalysts
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Metadata
- Authors
- Nakamura, R., Tanaka, T., & Nakato, Y.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2004-06-26
- Volume
- 108
- Issue
- 30
- Pages
- 10617-10620
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2043001072
- Cited by
- 618
- References
- 5
- FWCI
- 22.43
- Type
- journal article
- Language
- en
- Open access
- closed
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- Nakamura, R., Tanaka, T., & Nakato, Y. (2004). Mechanism for Visible Light Responses in Anodic Photocurrents at N-Doped TiO2 Film Electrodes. The Journal of Physical Chemistry B. https://doi.org/10.1021/jp048112q
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