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The role of oxygen in photooxidation of organic molecules on semiconductor particles
Abstract
The kinetics of O2 reduction accompanying oxidation of organic compounds on photocatalytic semiconductor particles is analyzed. The rate-controlling processes are defined and the electron reactivities are derived for two cases: A, electrons moving freely in the semiconductor particle and reacting with O2 anywhere on its surface and B, electrons trapped at or near the surface of the semiconductor particle and transferred from the traps only to nearby O2 molecules. Of these, case B appears realistic. Taking the properties of TiO2 particles as an example, it is shown that a sufficiently fast O2 reduction rate, of essence for attaining a high quantum efficiency in the photoassisted oxidation of organics, is achieved only when catalytic sites are incorporated in the TiO2 surface.
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Citations
Cited by
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
Advanced Oxidation Processes for Wastewater Treatment: Formation of Hydroxyl Radical and Application
WANG, J. L., & XU, L. J. (2012) · Critical Reviews in Environmental Science and Technology · doi:10.1080/10643389.2010.507698 · Cited by 1,586
Visible light induced photocatalytic degradation of organic pollutants
Chatterjee, D., & Dasgupta, S. (2005) · Journal of Photochemistry and Photobiology C: Photochemistry Reviews · doi:10.1016/j.jphotochemrev.2005.09.001 · Cited by 1,258
Recent advances in photocatalysis for environmental applications
Byrne, C., Subramanian, G., & Pillai, S. C. (2018) · Journal of Environmental Chemical Engineering · doi:10.1016/j.jece.2017.07.080 · Cited by 820
Photoinduced charge transfer processes in solar photocatalysis based on modified TiO 2
Park, H., Kim, H.-I., Moon, G.-H., & Choi, W. (2016) · Energy & Environmental Science · doi:10.1039/c5ee02575c · Cited by 582
Metadata
- Authors
- Gerischer, H., & Heller, A.
- Venue
- The Journal of Physical Chemistry
- Publisher
- American Chemical Society (ACS)
- Published
- 1991-06
- Volume
- 95
- Issue
- 13
- Pages
- 5261-5267
- ISSN
- 0022-3654 (ISSN-L)
- 1541-5740
- OpenAlex
- W2087623992
- Cited by
- 642
- References
- 0
- FWCI
- 10.84
- Type
- journal article
- Language
- en
- Open access
- closed
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- Gerischer, H., & Heller, A. (1991). The role of oxygen in photooxidation of organic molecules on semiconductor particles. The Journal of Physical Chemistry. https://doi.org/10.1021/j100166a063
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
