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Surface-enhanced Raman study of electrochemical and photocatalytic degradation of the azo dye Janus Green B

Paper ID Volume ID Publish Year Pages File Format Full-Text
48402 46505 2008 7 PDF Available
Title
Surface-enhanced Raman study of electrochemical and photocatalytic degradation of the azo dye Janus Green B
Abstract

The photocatalytic degradation of Janus Green B azo dye over silver modified titanium dioxide films was investigated by surface-enhanced Raman spectroscopy (SERS). An optimized SERS-active substrate was employed to study the photodegradation reaction of Janus Green B. Considering that photocatalytic degradation processes of organic molecules adsorbed on TiO2 might involve either their oxidation or reduction reaction, the vibrational spectroelectrochemical study of the dye was also performed, in order to clarify the transformations involved in initial steps of its photochemical decomposition. In order to understand the changes in Raman spectra of Janus Green B after photodegradation and/or electrochemical processes, a vibrational assignment of the main Raman active modes of the dye was carried out, based on a detailed resonance Raman profile. Products formed by electrochemical and photochemical degradation processes were compared. The obtained results revealed that the first steps of the degradation process of Janus Green B involve a reductive mechanism.

Keywords
Advanced oxidative processes; Photocatalytic degradation; Environmental electrochemistry; TiO2; Azo dyes; Spectroelectrochemistry; SERS; Janus Green B
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Surface-enhanced Raman study of electrochemical and photocatalytic degradation of the azo dye Janus Green B
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 77, Issues 3–4, 10 January 2008, Pages 339–345
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