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Enhanced catalytic degradation of AO7 in the CeO2–H2O2 system with Fe3+ doping

Paper ID Volume ID Publish Year Pages File Format Full-Text
47093 46458 2010 9 PDF Available
Title
Enhanced catalytic degradation of AO7 in the CeO2–H2O2 system with Fe3+ doping
Abstract

Degradation of Acid Orange 7 (AO7) was employed to evaluate the catalytic activity of the Fe3+ doped CeO2 in the presence of H2O2. Fe3+ doping in the ceria improved the degradation of AO7 in the dark as well as under the visible light irradiation and showed the highest catalytic activity at Fe/Ce = 1/100 (FC100). XPS, Raman and EPR studies showed that Fe3+ doping in the CeO2 greatly affected the concentration of Ce3+. FC100 was found to have the highest Ce3+ concentration. Raman and EPR studies confirmed the presence of surface peroxide-like species, which was derived from the complex of the surface Ce3+ and H2O2. DMPO spin trapping EPR studies indicated that peroxide-like species played a key role during the dark-reaction, while OH radical induced the degradation of AO7 under visible irradiation. The amounts of both active species were remarkably increased in the FC100/H2O2 system than those in the CeO2/H2O2 system.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights▶ Fe3+ doping enhances the Ce3+ concentration in CeO2. ▶ H2O2 interacts with Ce3+ to form surface peroxide species. ▶ Surface peroxide species degrade adsorbed AO7 at the surface of CeO2. ▶ Increased Ce3+ concentration from Fe3+ doping promotes the degradation of AO7.

Keywords
CeO2; Fe3+ doping; Ce3+; Peroxide species; Degradation
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Enhanced catalytic degradation of AO7 in the CeO2–H2O2 system with Fe3+ doping
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 101, Issues 1–2, 22 November 2010, Pages 160–168
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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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