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Cavity-confined acceleration of iron cycle for the Fenton-like reaction by β-CD-benzoquinone host–guest complex under visible irradiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
50283 46787 2015 6 PDF Available
Title
Cavity-confined acceleration of iron cycle for the Fenton-like reaction by β-CD-benzoquinone host–guest complex under visible irradiation
Abstract

•β-CD-benzoquinone (CDBQ) was readily prepared as cavity-confined co-catalyst.•CDBQ efficiently accelerated Fe2 +/Fe3 + cycle under visible irradiation.•The semi-quinone-like radical as an electron donor could coordinate with iron ions.•The redox of Fe2 +/Fe3 + with quinones occurred within the β-CD's cavity.•The cavity-confined acceleration has promising applications in photo-Fenton system.

The catalyst (CDBQ) that was prepared from β-cyclodextrin (β-CD) and 2,5-dihydroxy-1,4-benzoquinone (2,5-DBQ) achieved the cavity-confined acceleration of iron cycle under visible irradiation. The semi-quinone-like (SQ) radical was generated from photoexcitation of 2,5-DBQ within the β-CD's cavity. The SQ radical as an electron donor could coordinate with iron ions, and thus 2,5-DBQ shuttled one electron between Fe3 + and Fe2 + via Fe–dihydroxybenzoquinone complex process. In Fenton reactions, CDBQ greatly increased the HO yield, and thus significantly accelerated the degradation of dyes. The cavity-confined acceleration of iron cycle has promising applications in photo-Fenton system for the efficient decontamination for wastewater.

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Keywords
Host–guest complex; Iron cycle; Visible irradiation; Fenton
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Cavity-confined acceleration of iron cycle for the Fenton-like reaction by β-CD-benzoquinone host–guest complex under visible irradiation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 65, 5 May 2015, Pages 96–101
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
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us