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Role of Ag+ in the Band Structures and Photocatalytic Properties of AgMO3 (M: Ta and Nb) with the Perovskite Structure
Abstract
Photophysical and photocatalytic properties of perovskite-type materials AgMO 3 (M: Ta and Nb) consisting of Ag + and d 0 ions were investigated. The band gaps of AgTaO 3 and AgNbO 3 were 3.4 and 2.8 eV, respectively, being 0.6 eV smaller than the band gaps of NaTaO 3 (4.0 eV) and NaNbO 3, even if the crystal structures of AgMO 3 were similar to those of NaMO 3 . It was found from the electronic band structure study, using the plane-wave-based density functional method, that a hybrid orbital of Ag 4d and O 2p formed a valence band at a more negative level than O 2p orbitals. AgTaO 3 showed photocatalytic activity for pure water splitting into H 2 and O 2 under UV-light irradiation. AgNbO 3 has arisen as a new visible-light-driven photocatalyst possessing the ability to evolve H 2 or O 2 from water in the presence of sacrificial reagents.
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Cited by
Semiconductor-based Photocatalytic Hydrogen Generation
Chen, X., Shen, S., Guo, L., & Mao, S. S. (2010) · Chemical Reviews · doi:10.1021/cr1001645 · Cited by 7,876
Abe, R. (2010) · Journal of Photochemistry and Photobiology C: Photochemistry Reviews · doi:10.1016/j.jphotochemrev.2011.02.003 · Cited by 1,223
Metadata
- Authors
- Kato, H., Kobayashi, H., & Kudo, A.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2002-11-12
- Volume
- 106
- Issue
- 48
- Pages
- 12441-12447
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2124734280
- Cited by
- 486
- References
- 0
- FWCI
- 5.82
- Type
- journal article
- Language
- en
- Open access
- closed
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