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Photo-mineralization of noxious o-toluidine water pollutant by nano-ZnO: The role of the oxide surface texture on the kinetic path

Paper ID Volume ID Publish Year Pages File Format Full-Text
44964 46386 2015 8 PDF Available
Title
Photo-mineralization of noxious o-toluidine water pollutant by nano-ZnO: The role of the oxide surface texture on the kinetic path
Abstract

•Commercial and homemade ZnO were adopted to degrade toxic o-toluidine pollutant.•Best performance achieved by Z_comm sample: 83% degradation and 26% mineralization.•Intermediate products were identified by coupling LC/MS and ATR-FTIR analyses.•Two different degradation reaction pathways were described.•Extensive analyses including photocurrent and ATR confirm the photo-results.

Highly toxic o-toluidine pollutant was photo-degraded in water by using ZnO nanoparticles. The tested powders were both commercial and laboratory-made, the latter obtained by means of two innovative synthetic procedures. The disappearance and the relative mineralization of the molecule were followed by HPLC/UV and TOC determinations, respectively. Intermediate products were identified by coupling LC/MS of the eluate after 3 h of reaction and ATR-FTIR analyses of the used ZnO powders at the end of photocatalytic tests. Selected degradation paths, characterized by different kinetic degradation rates, can be suggested as a function of the different surface texture, the effective photocatalytic active area and the e−/h+ recombination processes of the ZnO particles.

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Keywords
ZnO nanoparticles; o-Toluidine; Photodegradation; LC/MS; Kinetic paths.
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Photo-mineralization of noxious o-toluidine water pollutant by nano-ZnO: The role of the oxide surface texture on the kinetic path
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 178, November 2015, Pages 233–240
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
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Any Questions? feel free to contact us