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Application of TiO2–RuO2/Ti electrodes modified with transition metal oxides in photoelectrochemical degradation of H-acid - synergetic effect

Paper ID Volume ID Publish Year Pages File Format Full-Text
27085 44000 2013 6 PDF Available
Title
Application of TiO2–RuO2/Ti electrodes modified with transition metal oxides in photoelectrochemical degradation of H-acid - synergetic effect
Abstract

Results of investigation of H-acid degradation in photoelectrochemical process with the application of TiO2–RuO2/Ti electrodes modified with transition metals oxides like: Nb2O5, ZrO2 and Y2O3, are described. Comparison of H-acid conversion calculated as a change in COD and TOC in photocatalytic, electrochemical and photoelectrochemical process shows that the highest conversion was achieved in the photoelectrochemical process due to a significant synergetic effect. The synergetic effect in the photodegradation of H-acid was estimated as a parameter – synergetic factor (SF). It appeared that SF depended on current intensity applied in the photoelectrochemical degradation of H-acid and on modification of titanium electrodes. The highest synergetic effect was obtained in the case of TiO2–RuO2/Ti electrodes modified with Nb2O5 in the atmosphere of nitrogen and applied in the processes carried out at the current intensity of 0.3 A.

► Combination of electrochemical and photocatalytic in degradation of H-acid. ► Oxide film electrodes modified with Y2O3, Nb2O5 and ZrO2 show higher activity. ► Transition metal oxides as photocatalysts improving significantly synergetic effect.

Keywords
Semiconductor electrodes; Photoelectrochemistry; Synergetic effect; H-acid
First Page Preview
Application of TiO2–RuO2/Ti electrodes modified with transition metal oxides in photoelectrochemical degradation of H-acid - synergetic effect
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 257, 1 April 2013, Pages 5–10
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering