Article

Visible light-induced degradation of organic pollutants using Fe(II) supported on silica gel as an effective catalyst

Central China Normal University College of Chemistry Wuhan 430070 China
Chinese Science Bulletin (impact factor: 1.32). 04/2012; 53(10):1497-1502. DOI:10.1007/s11434-007-0524-2 pp.1497-1502

ABSTRACT Silica gel-supported Fe(II) (SiOFe) was prepared and used for heterogeneous degradation of sulforhodamine B (SRB) and 2,4-dichlorophenol
(DCP) under visible irradiation (λ > 420 nm) as an effective catalyst. UV-visible spectra, and infrared Spectrophotometry (IR), fluorescence, total organic
carbon (TOC) and electron spin resonance (ESR) measurements were employed to analyze the photoreaction products. The results
showed that SRB could be efficiently degraded by SiOFe/H2O2 system under visible irradiation with 100% decolorization and 72.3% TOC removal after 180 min illumination. The results of
ESR and fluorescence measurements indicated that the oxidative process was predominated mainly by the hydroxyl radical (·OH)
generated in the system.

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Keywords

180 min illumination
 
effective catalyst
 
fluorescence measurements
 
hydroxyl radical
 
infrared Spectrophotometry
 
IR
 
Silica gel-supported Fe(II)
 
SiOFe/H2O2 system
 
SRB
 
sulforhodamine B
 
UV-visible spectra
 
visible irradiation
 

Chao Zhao