Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode

Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode

We investigated the photoelectrochemical oxidation of the dye Reactive Blue 4 in the presence of a DSA®-type electrode of nominal composition Ti/Ru0.3Ti0.7O2 under ultraviolet radiation, aiming to enhance the degradation yields of this dye. We conducted the photoelectrocatalytic treatment under galvanostatic control, using an 80 W mercury vapor lamp as the UV source. We also compared unassisted electrooxidative processes and photocatalytic processes with photoelectrochemical oxidation, to gain better insight into the employed advanced oxidation processes and to evaluate their applicability. The photoelectrooxidative process conducted at 37.8 mA cm-2 promoted fast color removal in the tested solution. The chemical oxygen demand and total organic carbon decreased by approximately 64.7 and 42.7%, respectively. High performance liquid chromatography, gas chromatography coupled to mass spectrometry helped to identify the intermediate compounds produced along the photoelectrochemical process, namely phthalic anhydride, phthalimide, phthalide, 1,3-indanone, and benzoic acid.

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Main Authors: Silva,Rodrigo G. da, Andrade,Adalgisa R. de
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Química 2016
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532016000500857
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spelling oai:scielo:S0103-505320160005008572016-05-18Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type ElectrodeSilva,Rodrigo G. daAndrade,Adalgisa R. de Reactive Blue 4 photoelectrochemical oxidation DSA® electrode environmental electrochemistry We investigated the photoelectrochemical oxidation of the dye Reactive Blue 4 in the presence of a DSA®-type electrode of nominal composition Ti/Ru0.3Ti0.7O2 under ultraviolet radiation, aiming to enhance the degradation yields of this dye. We conducted the photoelectrocatalytic treatment under galvanostatic control, using an 80 W mercury vapor lamp as the UV source. We also compared unassisted electrooxidative processes and photocatalytic processes with photoelectrochemical oxidation, to gain better insight into the employed advanced oxidation processes and to evaluate their applicability. The photoelectrooxidative process conducted at 37.8 mA cm-2 promoted fast color removal in the tested solution. The chemical oxygen demand and total organic carbon decreased by approximately 64.7 and 42.7%, respectively. High performance liquid chromatography, gas chromatography coupled to mass spectrometry helped to identify the intermediate compounds produced along the photoelectrochemical process, namely phthalic anhydride, phthalimide, phthalide, 1,3-indanone, and benzoic acid.info:eu-repo/semantics/openAccessSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society v.27 n.5 20162016-05-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532016000500857en10.5935/0103-5053.20150338
institution SCIELO
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Silva,Rodrigo G. da
Andrade,Adalgisa R. de
spellingShingle Silva,Rodrigo G. da
Andrade,Adalgisa R. de
Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode
author_facet Silva,Rodrigo G. da
Andrade,Adalgisa R. de
author_sort Silva,Rodrigo G. da
title Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode
title_short Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode
title_full Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode
title_fullStr Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode
title_full_unstemmed Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode
title_sort degradation of the dye reactive blue 4 by coupled photoassisted electrochemistry at dsa®-type electrode
description We investigated the photoelectrochemical oxidation of the dye Reactive Blue 4 in the presence of a DSA®-type electrode of nominal composition Ti/Ru0.3Ti0.7O2 under ultraviolet radiation, aiming to enhance the degradation yields of this dye. We conducted the photoelectrocatalytic treatment under galvanostatic control, using an 80 W mercury vapor lamp as the UV source. We also compared unassisted electrooxidative processes and photocatalytic processes with photoelectrochemical oxidation, to gain better insight into the employed advanced oxidation processes and to evaluate their applicability. The photoelectrooxidative process conducted at 37.8 mA cm-2 promoted fast color removal in the tested solution. The chemical oxygen demand and total organic carbon decreased by approximately 64.7 and 42.7%, respectively. High performance liquid chromatography, gas chromatography coupled to mass spectrometry helped to identify the intermediate compounds produced along the photoelectrochemical process, namely phthalic anhydride, phthalimide, phthalide, 1,3-indanone, and benzoic acid.
publisher Sociedade Brasileira de Química
publishDate 2016
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532016000500857
work_keys_str_mv AT silvarodrigogda degradationofthedyereactiveblue4bycoupledphotoassistedelectrochemistryatdsatypeelectrode
AT andradeadalgisarde degradationofthedyereactiveblue4bycoupledphotoassistedelectrochemistryatdsatypeelectrode
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