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Photocatalytic degradation of Michler's Ethyl Ketone in titanium dioxide dispersions under UV irradiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
28223 44066 2007 10 PDF Available
Title
Photocatalytic degradation of Michler's Ethyl Ketone in titanium dioxide dispersions under UV irradiation
Abstract

Michler's Ethyl Ketone (MEK) can be degraded photocatalytically under UV irradiation in aqueous dispersions. In the presence of both UV light illumination and TiO2 catalyst, MEK was more effectively degraded than with either UV or TiO2 alone. Results obtained show rapid and complete oxidation of MEK after 20-h, and more than 94% of the MEK was mineralized after a 48-h exposure to UV-365 nm irradiation. To obtain a better understanding on the mechanistic details of this TiO2-assisted photodegradation of the MEK with UV irradiation, 19 intermediates of the process were separated, identified, and characterized by HPLC-ESI-MS and GC–MS techniques in this study. The analytical results indicated that the photocatalytic degradation of MEK yielded intermediates such as N-hydroxyethylated species, N-de-ethylated compounds, aminobenzoic acid derivatives, aminobenzene derivatives, and aliphatic products. The possible degradation pathways were proposed and discussed on the basis of the evidence of oxidative intermediate formation. The reaction mechanisms of TiO2/UV proposed in this research should prove useful in future efforts to breakdown the organic compounds in wastewater.

Keywords
Michler's Ethyl Ketone; Photodegradation; TiO2; Photocatalytic
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Photocatalytic degradation of Michler's Ethyl Ketone in titanium dioxide dispersions under UV irradiation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 187, Issues 2–3, 15 April 2007, Pages 167–176
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