Journal
INORGANICA CHIMICA ACTA
Volume 406, Issue -, Pages 37-43Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2013.07.005
Keywords
Cationic cyclopentadienyl iron complexes; Electron transfer; Photo-Fenton; Visible light; Organic dye
Categories
Funding
- national natural science foundation of China [21176016]
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Cationic cyclopentadienyl iron complexes of arene ([CpFeAr](+)) were successfully loaded on silica gel (SiO) by physical absorption. The supported [CpFeAr](+) ([CpFeAr](+)/SiO) catalysts were characterized by SEM-EDX, FT-IR and UV-Vis spectra. The catalysts show strong and broad absorptions from 200 to 550 nm. [CpFeAr](+)/SiO carries out an effective photo-Fenton reaction with H2O2 under visible light for the photodegradations of organic dyes. Nearly total decolorations of rhodamine B (RhB) and crystal violet (CV) dyes were achieved by using [CpFeAr](+)/SiO as the heterogeneous catalyst. Hydroxyl radicals (center dot OH) were found in the photodegradation system of [CpFeAr](+)/SiO, H2O2 and dyes under visible light. The negative Delta G(el) values of CV/[CpFeAr](+) and RhB/[CpFeAr](+) systems indicate that the electron transfer processes for the dye/CpFe+ Ar systems are thermodynamically allowed. The possible mechanism for the degradation process of organic dyes in photo-Fenton reaction of [CpFeAr](+)/SiO with H2O2 is proposed. (C) 2013 Elsevier B.V. All rights reserved.
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