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

Chung Shin Lu, Chiing Chang Chen, Fu Der Mai, Yi Chin Wu

Research output: Contribution to journalArticle

13 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)167-176
Number of pages10
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume187
Issue number2-3
DOIs
Publication statusPublished - Apr 15 2007
Externally publishedYes

Fingerprint

Ketones
Dispersions
ketones
titanium oxides
Titanium dioxide
Irradiation
degradation
Degradation
irradiation
Aminobenzoates
Derivatives
Photodegradation
Aniline
organic compounds
Organic compounds
Ultraviolet radiation
titanium dioxide
Wastewater
Lighting
breakdown

Keywords

  • Michler's Ethyl Ketone
  • Photocatalytic
  • Photodegradation
  • TiO

ASJC Scopus subject areas

  • Bioengineering
  • Physical and Theoretical Chemistry

Cite this

Photocatalytic degradation of Michler's Ethyl Ketone in titanium dioxide dispersions under UV irradiation. / Lu, Chung Shin; Chen, Chiing Chang; Mai, Fu Der; Wu, Yi Chin.

In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 187, No. 2-3, 15.04.2007, p. 167-176.

Research output: Contribution to journalArticle

@article{dac3e6ab79b343c09b88af1a91cd004c,
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, Photocatalytic, Photodegradation, TiO",
author = "Lu, {Chung Shin} and Chen, {Chiing Chang} and Mai, {Fu Der} and Wu, {Yi Chin}",
year = "2007",
month = "4",
day = "15",
doi = "10.1016/j.jphotochem.2006.10.013",
language = "English",
volume = "187",
pages = "167--176",
journal = "Journal of Photochemistry and Photobiology A: Chemistry",
issn = "1010-6030",
publisher = "Elsevier",
number = "2-3",

}

TY - JOUR

T1 - Photocatalytic degradation of Michler's Ethyl Ketone in titanium dioxide dispersions under UV irradiation

AU - Lu, Chung Shin

AU - Chen, Chiing Chang

AU - Mai, Fu Der

AU - Wu, Yi Chin

PY - 2007/4/15

Y1 - 2007/4/15

N2 - 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.

AB - 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.

KW - Michler's Ethyl Ketone

KW - Photocatalytic

KW - Photodegradation

KW - TiO

UR - http://www.scopus.com/inward/record.url?scp=33947213296&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33947213296&partnerID=8YFLogxK

U2 - 10.1016/j.jphotochem.2006.10.013

DO - 10.1016/j.jphotochem.2006.10.013

M3 - Article

VL - 187

SP - 167

EP - 176

JO - Journal of Photochemistry and Photobiology A: Chemistry

JF - Journal of Photochemistry and Photobiology A: Chemistry

SN - 1010-6030

IS - 2-3

ER -