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Decomposition of methyl orange using C60 fullerene adsorbed on silica gel as a photocatalyst via visible-light induced electron transfer

Paper ID Volume ID Publish Year Pages File Format Full-Text
45749 46421 2015 7 PDF Available
Title
Decomposition of methyl orange using C60 fullerene adsorbed on silica gel as a photocatalyst via visible-light induced electron transfer
Abstract

•A photocatalyst, C60 adsorbed on silica gel (C60/SiO2), was applied to water purification.•Efficient decomposition of methyl orange with the catalyst under visible light was achieved.•The continuous flow system for the reaction using a column packed the C60/SiO2 powder was developed.•The catalyst contributes to the development of the water purification without using fossil energy.

Visible-light induced electron transfer reactions of C60 fullerene adsorbed on silica gel (C60/SiO2 powder) to methyl orange in water have been studied. The C60/SiO2 powder was simply prepared by mixing a toluene solution of the C60 fullerene with silica gel followed by evaporating the toluene. Irradiation by visible light (>420 nm) of the methyl orange aqueous solution (25 μM) in the presence of the C60/SiO2 powder and ascorbic acid resulted in the decomposition of the methyl orange. These results showed that the degradation conversion reached 96% after a 25-min visible light irradiation. The reaction also occurred by the irradiation of sunlight. The reductive products of methyl orange, N,N-dimethyl-p-phenylenediamine and sulfanilic acid, were ascertained and monitored by liquid chromatography/mass spectrometry (LC/MS). The reaction did not occur in the dark and in the absence of C60/SiO2 or ascorbic acid. The possible mechanism of the reaction is discussed. Furthermore, the C60/SiO2 powder was applied to a continuous flow system for the photodecomposition of methyl orange. C60/SiO2 powder was packed in a glass tube. The methyl orange solution was pumped into the glass tube, and the tube was irradiated by visible light or sunlight. The continuous decomposition of methyl orange was achieved by this method.

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Keywords
Fullerene; C60 fullerene adsorbed on silica gel; Photoinduced electron-transfer; Visible light; Methyl orange
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Decomposition of methyl orange using C60 fullerene adsorbed on silica gel as a photocatalyst via visible-light induced electron transfer
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 166–167, May 2015, Pages 544–550
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us