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An efficient electron transfer at the Fe0/iron oxide interface for the photoassisted degradation of pollutants with H2O2

Paper ID Volume ID Publish Year Pages File Format Full-Text
48273 46499 2008 6 PDF Available
Title
An efficient electron transfer at the Fe0/iron oxide interface for the photoassisted degradation of pollutants with H2O2
Abstract

Fe-200 was synthesized through the calcination of iron powder at 200 °C for 30 min in air. On the basis of characterization by X-ray diffraction and X-ray photoelectron spectroscopy, Fe-200 had a core–shell structure, in which the surface layer was mainly composed of Fe2O3 with some FeOOH and FeO, and the core retained metallic iron. The kinetics and mechanism of the interfacial electron transfer on Fe-200 were investigated in detail for the photoassisted degradation of organic pollutants with H2O2. Under deoxygenated conditions in the dark, the generation of hydroxyl radicals in aqueous Fe-200 dispersion verified that galvanic cells existed at the interface of Fe0/iron oxide, indicating the electron transfer from Fe0 to Fe3+. Furthermore, the effects of hydrogen peroxide and different organic pollutants on the interfacial electron transfer were examined by the change rate of the Fe3+ concentration in the solution. The results indicated that hydrogen peroxide provided a driving force in the electron transfer from Fe2+ to Fe3+, while the degradation of organic pollutants increased the electron transfer at the interface of Fe0/iron oxide due to their reaction with OH.

Keywords
Electron transfer; Galvanic cell-like performance; Iron oxides; Iron metal
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An efficient electron transfer at the Fe0/iron oxide interface for the photoassisted degradation of pollutants with H2O2
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 82, Issues 3–4, 8 August 2008, Pages 151–156
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us