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Magnetically recoverable FexOy–MWNT Fenton's catalysts that show enhanced activity at neutral pH

Paper ID Volume ID Publish Year Pages File Format Full-Text
46138 46430 2012 8 PDF Available
Title
Magnetically recoverable FexOy–MWNT Fenton's catalysts that show enhanced activity at neutral pH
Abstract

Known supported catalysts for the Fenton degradation of organic contaminants must be used in acidified solutions, where they leach Fe and consequently lose activity. In this study, FexOy nanoparticles (average diameter = 3 nm) were immobilized onto multiwalled carbon nanotubes using a facile microwave-assisted polyol method to produce a Fenton catalyst that was active at neutral pH. Despite an Fe content of only 1.5 wt%, FexOy–MWNTs catalyzed the near-complete degradation of 50 mg L−1 of an organic dye contaminant in water at pH0 = 7 in 30 min. At neutral pH, Fe leaching from the catalyst was minimal. Factors affecting the activity and stability of the catalyst were studied and a method was developed to regenerate the catalyst, which could be separated and reused with a small loss in activity.

Graphical abstractMagnetically recoverable FexOy–MWNT Fenton's catalysts active at neutral pH. Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights▸ Rapid microwave-assisted synthesis of multiwalled-carbon-nanotube-supported FexOy. ▸ FexOy–MWNTs successfully employed for heterogeneous dye degradation at pH0 = 7. ▸ Catalyst exhibited minimal leaching, thus was regenerated and reused.

Keywords
MWNT; Fenton; Heterogeneous catalyst; FexOy; Polyol functionalization; Advanced Oxidation Processes
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Magnetically recoverable FexOy–MWNT Fenton's catalysts that show enhanced activity at neutral pH
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 123–124, 23 July 2012, Pages 200–207
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