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Charge Distribution between UV-Irradiated TiO2 and Gold Nanoparticles: Determination of Shift in the Fermi Level
Abstract
TiO 2 nanoparticles when subjected to UV irradiation exhibit blue coloration as electrons are stored within the particles. Upon contact with gold nanoparticles, a partial disappearance of the blue color is seen as the stored electrons are transferred from TiO 2 to Au nanoparticles. The charge distribution between the semiconductor and metal nanoparticles causes the Fermi level to shift to more negative potentials. By employing C 60 /C 60 •- as a probe−redox couple, we were able to estimate the apparent Fermi levels of TiO 2 and TiO 2 /Au nanoparticles. A Fermi level shift of −22 mV observed for the Au−TiO 2 nanocomposite is indicative of improved charge separation in semiconductor−metal systems and demonstrates its usefulness for improving the efficiency of photocatalytic reactions.
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Citations
Cited by
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Lightcap, I. V., Kosel, T. H., & Kamat, P. V. (2010) · Nano Letters · doi:10.1021/nl9035109 · Cited by 1,044
Self-citationNanocomposites of TiO2 and Reduced Graphene Oxide as Efficient Photocatalysts for Hydrogen Evolution
Fan, W., Lai, Q., Zhang, Q., & Wang, Y. (2011) · The Journal of Physical Chemistry C · doi:10.1021/jp2008804 · Cited by 632
Silver doped titanium dioxide nanomaterials for enhanced visible light photocatalysis
Seery, M. K., George, R., Floris, P., & Pillai, S. C. (2007) · Journal of Photochemistry and Photobiology A: Chemistry · doi:10.1016/j.jphotochem.2007.02.010 · Cited by 616
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Park, H., Kim, H.-I., Moon, G.-H., & Choi, W. (2016) · Energy & Environmental Science · doi:10.1039/c5ee02575c · Cited by 582
Gomathi Devi, L., & Kavitha, R. (2016) · Applied Surface Science · doi:10.1016/j.apsusc.2015.11.016 · Cited by 359
Metadata
- Authors
- Jakob, M., Levanon, H., & Kamat, P. V.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2003-02-15
- Volume
- 3
- Issue
- 3
- Pages
- 353-358
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2089411019
- Cited by
- 841
- References
- 0
- FWCI
- 13.50
- Type
- journal article
- Language
- en
- Open access
- closed
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