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Zinc oxide mediated heterogeneous photocatalytic degradation of organic species under solar radiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
30848 44508 2011 9 PDF Available
Title
Zinc oxide mediated heterogeneous photocatalytic degradation of organic species under solar radiation
Abstract

The photocatalytic decomposition of eco-persistent toluene, salicylic acid and 4-chlorophenol with sun light in an oxygenated aqueous suspension has been studied under nanocrystalline hexagonal ZnO photocatalyst. The effect of substrate temperature onto the structural, morphological and photoactive properties has been investigated. The degradation of toluene, salicylic acid and 4-chlorophenol were achieved using a photoelectrochemical reactor module equipped with synthesized ZnO electrodes. Kinetic parameters have been investigated in terms of a first order rate equation. The rate constant (−k) for this heterogeneous photocatalysis was evaluated as a function of the initial concentration of original species. Substantial reduction in concentrations of toluene, salicylic acid and 4-chlorophenol was achieved as analyzed from COD and TOC studies. The mechanism for the degradation of toluene, salicylic acid and 4-chlorophenol could be explained on the basis of Langmuir–Hinshelwood mechanism.

► Approach of degradation of organic species in water is proposed using PEC reactor. ► Flower like ZnO photocatalyst enhances the surface area for reaction. ► Kinetic parameters have been investigated in terms of a first order rate equation. ► Correlation of TOC and COD for extent of mineralization has been investigated. ► Degradation analysis has explained on the basis of Langmuir–Hinshelwood mechanism.

Keywords
Zinc oxide; Chemical kinetics; Photoelectrocatalysis; Organic species; Sun light
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Zinc oxide mediated heterogeneous photocatalytic degradation of organic species under solar radiation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 104, Issue 3, 2 September 2011, Pages 425–433
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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