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Photocatalytic reduction of nitrate ions in water over metal-modified TiO2

Paper ID Volume ID Publish Year Pages File Format Full-Text
26871 43983 2012 9 PDF Available
Title
Photocatalytic reduction of nitrate ions in water over metal-modified TiO2
Abstract

TiO2 and TiO2 doped with Zn2+, Cu2+ and Cr3+ were used as photocatalysts to reduce nitrate and to oxidize formic acid. The metals were added to the TiO2 support by photodeposition and this method did not affect the form of the original crystalline semiconductor (100% anatase). The data obtained in the structural characterization and in the nitrate photoreduction experiments showed that 1.0 g L−1 4.4% Zn–TiO2 photocatalyst had the highest photocatalytic activity and selectivity toward nitrogen. The selectivity and conversion were higher than 95 and 91%, respectively, using a CHOOH:nitrate molar ratio of 16:1, which is twice the theoretical demand in the absence of dissolved oxygen.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► TiO2 and M–TiO2 (M = Zn2+, Cu2+ or Cr3+) were used to photoreduce nitrate. ► Characterization and photoreduction data showed Zn–TiO2 as the best catalyst. ► Selectivity and conversion reached values higher than 95 and 91%, respectively.

Keywords
Photocatalysis; Formic acid; Nitrate; Photoreduction; Zn–TiO2
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Photocatalytic reduction of nitrate ions in water over metal-modified TiO2
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 246, 15 October 2012, Pages 36–44
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