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Charge Carrier Dynamics of Standard TiO2 Catalysts Revealed by Femtosecond Diffuse Reflectance Spectroscopy
Abstract
Dynamics of charge carriers generated by femtosecond UV (160 fs, 390 nm) excitation in five standard TiO 2 photocatalytic powders (JRC-TIO-1, -2, -3, -4, and -5 supplied by the Catalysis Society of Japan) in a vacuum and air was investigated by means of time-resolved femtosecond diffuse reflectance spectroscopy, and was discussed from the viewpoints of crystal structure (anatase and rutile), particle size, and surrounding condition around the particles. Anatase TiO 2 catalysts showed very rapid (less than 1 ps) and very slow electron−hole recombination processes, while rutile ones did not show any rapid decay. For catalysts composed of small particles, slower electron−hole recombination was observed in air compared with that in a vacuum, which was well explained in terms of upward band bending near the surface due to adsorption of oxygen. The relationship between the observed charge carrier dynamics and photocatalytic reactivity is also discussed.
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Environmental applications of semiconductor photocatalysis
Hoffmann, M. R., Martin, S. T., Choi, W., & Bahnemann, D. W. (1995) · Chemical Reviews · doi:10.1021/cr00033a004 · Cited by 18,495
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
Ong, W.-J., Tan, L.-L., Ng, Y. H., Yong, S.-T., & Chai, S.-P. (2016) · Chemical Reviews · doi:10.1021/acs.chemrev.6b00075 · Cited by 7,147
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
Semiconductor Photocatalysis—Mechanistic and Synthetic Aspects
Kisch, H. (2013) · Angewandte Chemie International Edition · doi:10.1002/anie.201201200 · Cited by 854
Zheng, Q., Chu, W., Zhao, C., Zhang, L., Guo, H., Wang, Y., Jiang, X., & Zhao, J. (2019) · WIREs Computational Molecular Science · doi:10.1002/wcms.1411 · Cited by 452
Vu, N., Kaliaguine, S., & Do, T. (2019) · Advanced Functional Materials · doi:10.1002/adfm.201901825 · Cited by 445
Metadata
- Authors
- Furube, A., Asahi, T., Masuhara, H., Yamashita, H., & Anpo, M.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 1999-04-01
- Volume
- 103
- Issue
- 16
- Pages
- 3120-3127
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2073578780
- Cited by
- 275
- References
- 2
- FWCI
- 10.49
- Type
- journal article
- Language
- en
- Open access
- closed
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- Furube, A., Asahi, T., Masuhara, H., Yamashita, H., & Anpo, M. (1999). Charge Carrier Dynamics of Standard TiO2 Catalysts Revealed by Femtosecond Diffuse Reflectance Spectroscopy. The Journal of Physical Chemistry B. https://doi.org/10.1021/jp984162h
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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