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Photo-Fenton oxidation of phenol with Fe(III)-tetra-4-carboxyphenylporphyrin/SiO2 assisted with visible light

Paper ID Volume ID Publish Year Pages File Format Full-Text
26139 43936 2014 6 PDF Available
Title
Photo-Fenton oxidation of phenol with Fe(III)-tetra-4-carboxyphenylporphyrin/SiO2 assisted with visible light
Abstract

•Hydroxyl radicals were generated by TCPPFe/SiO2 under visible light irradiation.•pH 2.8 is the optimal in the photo-oxidation process.•Hydroquinone, catechol and benzoquinone were main products of the photo-oxidation process.

In this work we studied the photo-Fenton oxidation of phenol in aqueous solution using tetra(4-carboxyphenyl)porphyrin iron (III) adsorbed on silicon dioxide (TCPPFe/SiO2) under irradiation of visible light for the generation of hydroxyl radicals. The TCPPFe/SiO2 was synthesized by the Alder's method and, it was characterized by spectrophotometry UV–vis, FT-IR and electron paramagnetic resonance (EPR). The hydroxyl radicals were detected by chemical trapping through indirect fluorescence of the 2-hydroxyterephthalic acid. The secondary products of the phenol photo-oxidation were analyzed by High Pressure Liquid Chromatography (HPLC) where hydroquinone, catechol and benzoquinone were identified as main products. Finally, we determined and compared the kinetic parameters of the photo-oxidation process using a pseudo-first order model.

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Keywords
Porphyrin; Hydroxyl radical; SiO2; Phenol
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Photo-Fenton oxidation of phenol with Fe(III)-tetra-4-carboxyphenylporphyrin/SiO2 assisted with visible light
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 294, 15 November 2014, Pages 75–80
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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