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Adsorption and heterogeneous Fenton degradation of 17α-methyltestosterone on nano Fe3O4/MWCNTs in aqueous solution

Paper ID Volume ID Publish Year Pages File Format Full-Text
46884 46452 2011 10 PDF Available
Title
Adsorption and heterogeneous Fenton degradation of 17α-methyltestosterone on nano Fe3O4/MWCNTs in aqueous solution
Abstract

A novel catalyst, inverse-spinel ferroferric oxide nanoparticles decorated multiwalled carbon nanotubes (Fe3O4/MWCNTs) was successfully prepared, and applied for the adsorption and degradation of trace artificial androgen 17α-methyltestosterone (MT) in the presence of H2O2. The regular growth of ferroferric oxide crystal on multiwalled carbon nanotubes was achieved by in situ oxidation of Fe2+ in hot alkaline solution. The catalyst was characterized by BET, XRD, TEM, XPS and Raman spectroscopy. The effects of initial pH, catalyst loading, oxidant concentration and iron leaching on the degradation of MT were investigated. The Fe3O4/MWCNTs showed higher ability of adsorption and degradation efficiency of MT than bare Fe3O4 in the batch degradation experiment. The degradation efficiencies increased with the initial pH decreasing in the wide pH range of 8.0–3.5. Further, the catalyst showed stable catalytic activity, fairly good mechanic stability and convenient recycling. Negligible iron leaching showed the reused Fe3O4/MWCNTs withstood the oxidation. The enhanced degradation efficiency of Fe3O4/MWCNTs may relate to the enrichment of trace MT molecules by MWCNTs in the vicinities of active sites.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A novel inverse-spinel Fe3O4/MWCNTs catalyst was prepared by in situ growth. ► The catalyst has been used to adsorb and degrade trace 17α-methyltestosterone. ► The catalyst showed higher adsorption and catalytic ability than nano Fe3O4. ► The enhanced ability related to the enrichment of target molecules on MWCNTs.

Keywords
17α-Methyltestosterone; Magnetite decorated multiwalled carbon nanotube; Adsorption; Heterogeneous Fenton reaction
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Adsorption and heterogeneous Fenton degradation of 17α-methyltestosterone on nano Fe3O4/MWCNTs in aqueous solution
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 107, Issues 3–4, 21 September 2011, Pages 274–283
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