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Photocatalytic decomposition of aspartic acid over bare and silver deposited TiO2

Paper ID Volume ID Publish Year Pages File Format Full-Text
28599 44081 2006 7 PDF Available
Title
Photocatalytic decomposition of aspartic acid over bare and silver deposited TiO2
Abstract

Photodegradation of aspartic acid over UV irradiated bare and silver deposited titanium dioxide was investigated. It has been demonstrated that the nitrogen content of the amino acid is converted dominantly into NH3 (detected as NH4+). The evolution of CO2 was also measured. Both of these processes resulted in a considerable increase of pH in the liquid phase of the reaction mixture providing significant change in the reaction mechanism. Under prolonged irradiation NH4+ is oxidized through NO2− intermediate to NO3−. The primary steps of the mechanism of photodegradation are analyzed and described considering the results of competitive kinetic studies performed by using oxalic acid as efficient hole scavenger, coumarin as OH scavenger and various bare and silver deposited titanium dioxide.

Keywords
Photodegradation; Photocatalysis; Titanium dioxide; Aspartic acid; Oxalic acid; Coumarin
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Photocatalytic decomposition of aspartic acid over bare and silver deposited TiO2
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 184, Issues 1–2, 15 November 2006, Pages 221–227
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
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