三价铁离子和二价铁离子在增强氯酚混合混合物的多相太阳能光催化降解中的作用。

Role of ferric and ferrous ions in the enhancement of the heterogeneous solar photocatalytic degradation of combined mixture of chlorophenols.

作者信息

Abeish Abdulbasit M, Ang H Ming, Znad Hussein

机构信息

Department of Chemical Engineering, Curtin University, GPO Box U1987 Perth, WA 6845, Australia E-mail:

出版信息

Water Sci Technol. 2015;72(9):1561-8. doi: 10.2166/wst.2015.374.

DOI:10.2166/wst.2015.374

PMID:26524447

Abstract

The solar photocatalytic degradation of 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP) was investigated individually and combined in the presence of Fe2+ and Fe3+ ions. The results revealed that both Fe2+ and Fe3+ ions enhanced the heterogeneous photocatalytic degradation. Fe3+ ions rapidly converted to Fe2+ ions as soon as the irradiation started. The intermediates formed during the degradation of 4-CP/2,4-DCP were also monitored and identified. Three main intermediates were observed, hydroquinone, phenol, and 4-chlorocatechol with traces of benzoquinone. The results support a new trend of research by utilising other cheap iron ion sources in the photocatalytic degradation.

摘要

研究了在Fe2+和Fe3+离子存在的情况下，4-氯苯酚（4-CP）和2,4-二氯苯酚（2,4-DCP）的单独以及联合太阳能光催化降解情况。结果表明，Fe2+和Fe3+离子均增强了多相光催化降解。光照一开始，Fe3+离子就迅速转化为Fe2+离子。还监测并鉴定了4-CP/2,4-DCP降解过程中形成的中间体。观察到三种主要中间体，对苯二酚、苯酚和4-氯邻苯二酚，并伴有痕量的苯醌。这些结果支持了在光催化降解中利用其他廉价铁离子源的新研究趋势。