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

研究成果: 雜誌貢獻文章同行評審

13 引文 斯高帕斯(Scopus)

摘要

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.

原文英語
頁(從 - 到)167-176
頁數10
期刊Journal of Photochemistry and Photobiology A: Chemistry
187
發行號2-3
DOIs
出版狀態已發佈 - 四月 15 2007
對外發佈

ASJC Scopus subject areas

  • 生物工程
  • 物理與理論化學

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