Fenton Photocatalytic Degradation of Organic Dye Under Visible Irradiation

Abstract

Abstract: A photooxidative system for degradation of organic dye pollutant RhB as an objective compound was reported under visible irradiation(λ>450 nm) by using Fe^³⁺/H₂O₂ as the Fenton reagent. It was found that,in the system with pH<3.0,visible light irradiation significantly accelerates the degradation process by photosensitive effect.After 160 min the RhB was mineralized with a yield of 71.8%.Bromocresol green reaction spectrophotometrically,spin-trapping electron paramagnetic resonance,UV-Vis spectroscopy,IR and total organic carbon(TOC) measurements were used to detect the photoreaction process.The photocatalytic degradation pathway mainly involves the formation of ^·OH and carboxylie acids are the main intermediate products. H₂O₂ of Fe³+/H₂O₂/RhB system was utilized lowlier than that of supermolecular metal/organie complexes or supported catalysts system.

Key words: Fenton; Rhodamine B; Photocatalysis; Degradation, Fenton, Rhodamine B, Photocatalysis, Degradation

CLC Number:

O643

TrendMD:

HUANG Ying-Ping, LIU De-Fu, ZHANG Shui-Ying, ZHANG De-Li, MA Wan-Hong, ZHAO Jin-Cai . Fenton Photocatalytic Degradation of Organic Dye Under Visible Irradiation[J]. Chem. J. Chinese Universities, 2005, 26(12): 2273.

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Fenton Photocatalytic Degradation of Organic Dye Under Visible Irradiation

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