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Kinetic study of the 4-Nitrophenol photooxidation and photoreduction reactions using CdS

Paper ID Volume ID Publish Year Pages File Format Full-Text
45387 46410 2014 7 PDF Available
Title
Kinetic study of the 4-Nitrophenol photooxidation and photoreduction reactions using CdS
Abstract

•CdS can be used for the oxidation or reduction of nitrophenolic compounds.•4-Nitrophenol can be oxidizing with hydroxyl radical formation under UV light.•4-Nitrophenol photoreduction was achieved using 8 mM Na2SO3.•The CdS is active with either UV or blue light irradiation.

We have investigated the kinetics of the photooxidation or photoreduction of 4-Nitrophenol (4-NP) with CdS as photocatalyst, and UV or visible light irradiation in the presence of Na2SO3. The photocatalytic reaction was performed by varying the Na2SO3 concentration under aerobic or anaerobic conditions, photocatalyst load and 4-Nitrophenol concentration. The 4-NP oxidation was attributed to the formation of the hydroxyl radical at 4 mM Na2SO3 concentration in either aerobic or anaerobic conditions under UV light irradiation. The 4-NPhenolate reduction was related to the sulfite radicals formed with appropriate Na2SO3 concentration (8 mM) in anaerobic conditions under UV or visible light. The 4-NP oxidation and reduction reactions follow a zero order kinetic and can be used as a model reaction to evaluate the active photocatalyst under UV or visible light.

Graphical abstractPotential diagram for the photo-oxidation or photo-reduction of 4-Nitrophenol as function of Na2SO3 using CdS under UV or visible light irradiation.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
CdS photocatalyst; 4-Nitrophenol; Photoxidation; Photoreduction; Na2SO3 concentrations
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Kinetic study of the 4-Nitrophenol photooxidation and photoreduction reactions using CdS
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 144, January 2014, Pages 507–513
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