文章基本信息

标题：Photoelectrocatalytic Oxidation of Ethinylestradiol on a Ti/TiO2 Electrode: Degradation Efficiency and Search for By-Products
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作者：Karla Moreira Vieira ; Fabiana Maria Monteiro Paschoal ; Maria Valnice Boldrin Zanoni 等
期刊名称：Green and Sustainable Chemistry
印刷版ISSN：2160-6951
电子版ISSN：2160-696X
出版年度：2014
卷号：04
期号：03
页码：151-161
DOI：10.4236/gsc.2014.43020
语种：English
出版社：Scientific Research Publishing
摘要：The degradation of ethinylestradiol (EE, an orally bio-active estrogen) in an aqueous-methanolic solution using a Ti/TiO2 thin-film electrode and UV radiation (a photoelectrocatalytic system) was evaluated. Hence, HPLC/UV analysis shows that EE (at 0.34 mmol) is totally consumed after 30 minutes of exposure to the photoelectrocatalytic system in the presence of Na2SO4 (0.1 mol·L-1) and with an applied bias potential of +1.0 V versus the Ag/AgCl reference electrode. Moreover, monitoring by direct infusion electrospray ionization mass spectrometry (ESI-MS) and SPME-GC/ MS (solid phase microextraction coupled with gas chromatography-mass spectrometry) reveals that apparently no degradation products are formed under these conditions. Hence, this study demonstrates that the photoelectrocatalytic system can be efficiently used to promote the complete degradation (and likely mineralization) of this hormone under these conditions.
关键词：Photoelectrocatalytic Oxidation; Ethinylestradiol; Ti/TiO₂ Thin-Film Electrode; Degradation Efficiency; Search for By-Products