The DOI matches its Crossref record; 30 of the 30 references it cites were found in a registry or an index.
Core–Shell Structure Dependent Reactivity of Fe@Fe2O3 Nanowires on Aerobic Degradation of 4-Chlorophenol
Abstract
In this study, core-shell Fe@Fe₂O₃ nanowires with different iron oxide shell thickness were synthesized through tuning water-aging time after the reduction of ferric ions with sodium borohydride without any stirring. We found that these Fe@Fe₂O₃ nanowires exhibited interesting core-shell structure dependent reactivity on the aerobic degradation of 4-chlorophenol. Characterization results revealed that the core-shell structure dependent aerobic oxidative reactivity of Fe@Fe₂O₃ nanowires was arisen from the combined effects of incrassated iron oxide shell and more surface bound ferrous ions on amorphous iron oxide shell formed during the water-aging process. The incrassated iron oxide shell would gradually block the outward electron transfer from iron core for the subsequent two-electron molecular oxygen activation, but more surface bound ferrous ions on iron oxide shell with prolonging aging time could favor the single-electron molecular oxygen activation, which was confirmed by electron spin resonance spectroscopy with spin trap technique. The mineralization of 4-chlorophenol was monitored by total organic carbon measurement and the oxidative degradation intermediates were analyzed by gas chromatography-mass spectrometry. This study provides new physical insight on the molecular oxygen activation mechanism of nanoscale zerovalent iron and its application on aerobic pollutant removal.
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Metadata
- Authors
- Ai, Z., Gao, Z., Zhang, L., He, W., & Yin, J. J.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2013-05-07
- Volume
- 47
- Issue
- 10
- Pages
- 5344-5352
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2068438924
- Cited by
- 338
- References
- 30
- FWCI
- 12.05
- Type
- journal article
- Language
- en
- Open access
- closed
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- Ai, Z., Gao, Z., Zhang, L., He, W., & Yin, J. J. (2013). Core–Shell Structure Dependent Reactivity of Fe@Fe2O3 Nanowires on Aerobic Degradation of 4-Chlorophenol. Environmental Science & Technology. https://doi.org/10.1021/es4005202
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