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Enhancing Photochemical Activity of Semiconductor Nanoparticles with Optically Active Ag Nanostructures: Photochemistry Mediated by Ag Surface Plasmons
Abstract
Composite materials composed of optically active Ag nanostructures and TiO 2 photocatalysts show enhanced photoactivity compared to the pure TiO 2 in the decomposition of methylene blue. The enhanced photochemical activity is attributed to radiative transfer of energy, mediated by surface plasmons, from Ag particles to the semiconductor leading to higher concentrations of charge carriers (e − /h + pairs) in the semiconductor and therefore to higher photochemical activity. We demonstrate that the performance of the composite photocatalysts is a strong function of the size and shape of Ag nanostructures. This can be explained by the size- and shape-specific optical activity of Ag nanostructures. We show that by rationally changing the size and shape of Ag nanostructures it is possible to maximize photochemical activity of a semiconductor at a given excitation wavelength.
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Cites
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
Plasmonic-metal nanostructures for efficient conversion of solar to chemical energy
Linic, S., Christopher, P., & Ingram, D. B. (2011) · Nature Materials · doi:10.1038/nmat3151 · Cited by 4,852
Self-citationZhou, X., Liu, G., Yu, J., & Fan, W. (2012) · Journal of Materials Chemistry · doi:10.1039/c2jm31902k · Cited by 527
Gomathi Devi, L., & Kavitha, R. (2016) · Applied Surface Science · doi:10.1016/j.apsusc.2015.11.016 · Cited by 359
Plasmon-enhanced chemical reactions
Xiao, M., Jiang, R., Wang, F., Fang, C., Wang, J., & Yu, J. C. (2013) · Journal of Materials Chemistry A · doi:10.1039/c3ta01450a · Cited by 287
Metadata
- Authors
- Christopher, P., Ingram, D. B., & Linic, S.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2010-04-29
- Volume
- 114
- Issue
- 19
- Pages
- 9173-9177
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W2013650605
- Cited by
- 339
- References
- 2
- FWCI
- 10.08
- Type
- journal article
- Language
- en
- Open access
- closed
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