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Visible light photocatalytic ozonation of DEET in the presence of different forms of WO3

Paper ID Volume ID Publish Year Pages File Format Full-Text
53856 46987 2015 7 PDF Available
Title
Visible light photocatalytic ozonation of DEET in the presence of different forms of WO3
Abstract

•Different WO3 materials for visible light photocatalytic ozonation of DEET.•Synergistic effect between ozone and irradiated WO3 with visible light.•Higher efficiency of monoclinic/orthorhombic WO3 vs. hexagonal structure.•Beneficial effect of W reduced states in the presence of ozone.•Complete removal of DEET in 20 min and 70% mineralization in 120 min.

This work deals with the use of WO3 materials for the removal of DEET, an emerging contaminant, through photocatalytic ozonation using visible light as radiation source. A commercial WO3 and own-made WO3 catalysts with different forms and crystalline structure were synthetized by sol–gel and hydrothermal methods. After catalyst characterization with different techniques, photocatalytic ozonation under visible light radiation was found an efficient process to remove DEET. Monoclinic and/or orthorhombic structure of WO3 seems to favor the catalytic activity more than a developed surface area together with the presence of W reduced states in the presence of ozone. The best catalysts lead to a complete removal of DEET in less than 20 min with mineralization up to 70% in 2 h.

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Keywords
Photocatalytic ozonation; Tungsten trioxide; DEET; Ozone; Visible light
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Visible light photocatalytic ozonation of DEET in the presence of different forms of WO3
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 252, 1 September 2015, Pages 100–106
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