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Mechanism of Photodecomposition of H2O2 on TiO2 Surfaces under Visible Light Irradiation
Abstract
Photodecomposition of hydrogen peroxide on TiO 2 surfaces under visible irradiation (λ > 420 nm) was investigated, and an interesting result was found that small organic compounds such as salicylic acid were degraded in the presence of TiO 2 and H 2 O 2 under visible irradiation, although either TiO 2 or H 2 O 2 alone cannot absorb visible light to decompose H 2 O 2 or small organic compounds. Furthermore, the effects of H 2 O 2 concentration, pH, and the wavelength of irradiation light on the degradation of H 2 O 2 were studied. The photodegradation of H 2 O 2 occurred via a zero-order process, and • OH radicals were detected by electron paramagnetic resonance experiments in visible-light-irradiated aqueous TiO 2 suspensions. A reaction mechanism for the decomposition of H 2 O 2 on the TiO 2 surfaces is proposed involving a photoinduced electron transfer of the surface complexes of ⋮Ti IV −OOH.
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Cited by
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
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
Tsukamoto, D., Shiro, A., Shiraishi, Y., Sugano, Y., Ichikawa, S., Tanaka, S., & Hirai, T. (2012) · ACS Catalysis · doi:10.1021/cs2006873 · Cited by 478
Zhang, G., Kim, G., & Choi, W. (2014) · Energy & Environmental Science · doi:10.1039/c3ee43147a · Cited by 470
Photocatalytic Degradation of Organic Pollutants Under Visible Light Irradiation
Zhao, J., Chen, C., & Ma, W. (2005) · Topics in Catalysis · doi:10.1007/s11244-005-3834-0 · Cited by 414
Self-citationMechanism of the OH Radical Generation in Photocatalysis with TiO2 of Different Crystalline Types
Zhang, J., & Nosaka, Y. (2014) · The Journal of Physical Chemistry C · doi:10.1021/jp501214m · Cited by 396
Metadata
- Authors
- Li, X., Chen, C., & Zhao, J.
- Venue
- Langmuir
- Publisher
- American Chemical Society (ACS)
- Published
- 2001-05-23
- Volume
- 17
- Issue
- 13
- Pages
- 4118-4122
- ISSN
- 0743-7463 (ISSN-L)
- 1520-5827
- OpenAlex
- W2088500785
- Cited by
- 378
- References
- 0
- FWCI
- 2.57
- Type
- journal article
- Language
- en
- Open access
- closed
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