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Photodegradation of Indigo Carmine dye by CdS nanostructures under blue-light irradiation emitted by LEDs

Paper ID Volume ID Publish Year Pages File Format Full-Text
53676 46979 2016 9 PDF Available
Title
Photodegradation of Indigo Carmine dye by CdS nanostructures under blue-light irradiation emitted by LEDs
Abstract

•CdS nanofiber or flower was obtained in different organic solvent.•High activity of Indigo Carmine degradation was achieved with CdS nanofibers.•CdS nanofibers induce as the IC dye oxidation as the reduction reaction.•CdS is photoactive under blue light irradiation by using blue LED lamp.

Two nanostructured CdS semiconductors were prepared by the precipitation method under ethylenediamine mild synthesis conditions. The ethylenediamine–acetonitrile solvent mixture induces the formation of CdS-1D-flexible nanofibers, whereas the ethylenediamine–ammonia solvent produces 3D-microflower morphology. Similar crystalline structure and optical–electronic properties were obtained by using both solvents; however, the photocatalytic activity strongly depends on both the CdS morphology and textural properties. In comparison with the commercial CdS, the flexible CdS nanofibers showed the highest photocatalytic activity in the photodegradation of Indigo Carmine (IC) dye by using pure blue light irradiation. The effect of the stirring rate, photocatalyst load and IC dye concentration was investigated under either the diffusive or kinetic controlled regime of the photoreaction. The influence of the pH solution and stability cycle on the nanofibers was also evaluated. The blue photoreduction of IC dye was also investigated in the presence of hydrazine as O2 scavenger. The possible oxidation or reduction mechanisms of the IC dye by the photogeneration of either the superoxide or hydrazil radicals on the surface of the CdS nanofibers are presented and discussed.

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Keywords
CdS nanofibers; Indigo Carmine; Hydrazine; Ethylenediamine solvent; Blue-light LEDs
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Photodegradation of Indigo Carmine dye by CdS nanostructures under blue-light irradiation emitted by LEDs
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 266, 15 May 2016, Pages 27–35
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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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