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Gold Nanoparticles Located at the Interface of Anatase/Rutile TiO2 Particles as Active Plasmonic Photocatalysts for Aerobic Oxidation
Abstract
Visible-light irradiation (λ > 450 nm) of gold nanoparticles loaded on a mixture of anatase/rutile TiO(2) particles (Degussa, P25) promotes efficient aerobic oxidation at room temperature. The photocatalytic activity critically depends on the catalyst architecture: Au particles with <5 nm diameter located at the interface of anatase/rutile TiO(2) particles behave as the active sites for reaction. This photocatalysis is promoted via plasmon activation of the Au particles by visible light followed by consecutive electron transfer in the Au/rutile/anatase contact site. The activated Au particles transfer their conduction electrons to rutile and then to adjacent anatase TiO(2). This catalyzes the oxidation of substrates by the positively charged Au particles along with reduction of O(2) by the conduction band electrons on the surface of anatase TiO(2). This plasmonic photocatalysis is successfully promoted by sunlight exposure and enables efficient and selective aerobic oxidation of alcohols at ambient temperature.
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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
Identification of Active Gold Nanoclusters on Iron Oxide Supports for CO Oxidation
Herzing, A. A., Kiely, C. J., Carley, A. F., Landon, P., & Hutchings, G. J. (2008) · Science · doi:10.1126/science.1159639 · Cited by 1,530
Cited by
Heterogeneous visible light photocatalysis for selective organic transformations
Lang, X., Chen, X., & Zhao, J. (2014) · Chem. Soc. Rev. · doi:10.1039/c3cs60188a · Cited by 1,545
Metadata
- Authors
- Tsukamoto, D., Shiraishi, Y., Sugano, Y., Ichikawa, S., Tanaka, S., & Hirai, T.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2012-04-02
- Volume
- 134
- Issue
- 14
- Pages
- 6309-6315
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2065178212
- Cited by
- 648
- References
- 2
- FWCI
- 25.14
- Type
- journal article
- Language
- en
- Open access
- closed
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- Tsukamoto, D., Shiraishi, Y., Sugano, Y., Ichikawa, S., Tanaka, S., & Hirai, T. (2012). Gold Nanoparticles Located at the Interface of Anatase/Rutile TiO2 Particles as Active Plasmonic Photocatalysts for Aerobic Oxidation. Journal of the American Chemical Society. https://doi.org/10.1021/ja2120647
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