Titanium dioxide-mediated photocatalytic degradation of Acridine Orange in aqueous suspensions under UV irradiation

Chung Shin Lu, Fu Der Mai, Chia Wei Wu, Ren Jang Wu, Chiing Chang Chen

研究成果: 雜誌貢獻文章同行評審

38 引文 斯高帕斯(Scopus)

摘要

The TiO2/UV photocatalytic degradation of Acridine Orange (AO) was investigated in aqueous heterogeneous suspension. The results indicated that photocatalytic reactions were enhanced in alkaline medium. While the rate of photocatalytic degradation of the dye increased with increasing concentration of TiO2, at high doses of TiO2, the rate of reaction was reduced as a result of light attenuation. To obtain a better understanding of the mechanistic details of this TiO2 assisted dye photodegradation, the intermediates of the processes were separated, identified, and characterized using HPLC-ESI-MS. It was found that N-de-methylation degradation of the dye took place in a stepwise manner to yield mono-, di-, tri-, and tetra-N-de-methylated species. The probable photodegradation pathways are proposed and discussed.

原文英語
頁(從 - 到)706-713
頁數8
期刊Dyes and Pigments
76
發行號3
DOIs
出版狀態已發佈 - 2008
對外發佈

ASJC Scopus subject areas

  • 化學工程 (全部)
  • 製程化學與技術

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