The DOI matches its Crossref record.
Degradation of Dye Pollutants by Immobilized Polyoxometalate with H2O2 under Visible-Light Irradiation
Abstract
A Keggin polyoxometalate (POM, i.e., PW12O40(3-)) and its lacunary derivative are immobilized on an anionic exchange resin through electrostatic interaction at pH 4.6 in an aqueous dispersion. The resin-supported POM thus obtained catalyzes the efficient degradation of cationic dye pollutants in the presence of H2O2 under visible-light irradiation. To evaluate the photocatalytic system, degradation of a rhodamine B (RB) dye was investigated in detail using UV-visible spectroscopy, high performance liquid chromatography, and gas chromatography/mass spectrometry techniques to identify the intermediates and final products. Fluorescence lifetime measurements revealed the electron transfer from the visible-light-excited RB molecules to the POMs. Electron paramagnetic resonance measurements, investigation of the effects of *OH and *OOH scavengers on the photoreaction kinetics, and IR analysis indicated that de-ethylation of RB was due to *OOH radicals, but the decomposition of the conjugated xanthene structure was caused by the peroxo species formed by interaction of H2O2 with the lacunary POM loaded on the resin. A total organic carbon removal of ca. 22% was achieved, and the recycle experiment suggested excellent stability and reusability of the heterogeneous catalyst. On the basis of the experimental results, a photocatalytic mechanism is discussed.
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Cited by
Review of iron-free Fenton-like systems for activating H2O2 in advanced oxidation processes
Bokare, A. D., & Choi, W. (2014) · Journal of Hazardous Materials · doi:10.1016/j.jhazmat.2014.04.054 · Cited by 2,368
Visible Light-Driven Photocatalytic Degradation of Rhodamine B over NaBiO3: Pathways and Mechanism
Yu, K., Yang, S., He, H., Sun, C., Gu, C., & Ju, Y. (2009) · The Journal of Physical Chemistry A · doi:10.1021/jp905173e · Cited by 555
Yin, M., Li, Z., Kou, J., & Zou, Z. (2009) · Environmental Science & Technology · doi:10.1021/es902011h · Cited by 490
HE, Z., YANG, S., JU, Y., & SUN, C. (2009) · Journal of Environmental Sciences · doi:10.1016/s1001-0742(08)62262-7 · Cited by 242
Degradation of Chelating Agents in Aqueous Solution Using Advanced Oxidation Process (AOP)
Sillanpää, M. E. T., Agustiono Kurniawan, T., & Lo, W.-H. (2011) · Chemosphere · doi:10.1016/j.chemosphere.2011.01.007 · Cited by 201
Metadata
- Authors
- Lei, P., Chen, C., Yang, J., Ma, W., Zhao, J., & Zang, L.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-10-01
- Volume
- 39
- Issue
- 21
- Pages
- 8466-8474
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2012363997
- Cited by
- 249
- References
- 0
- FWCI
- 3.22
- Type
- journal article
- Language
- en
- Open access
- closed
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- Lei, P., Chen, C., Yang, J., Ma, W., Zhao, J., & Zang, L. (2005). Degradation of Dye Pollutants by Immobilized Polyoxometalate with H2O2 under Visible-Light Irradiation. Environmental Science & Technology. https://doi.org/10.1021/es050321g
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