OPTIMIZATION AND EFFECTS OF SOME ELECTRON ACCEPTORS ON THE PHOTOCATALYTIC DEGRADATION OF DIRECT RED 23 AZO DYE

The photocatalytic degradation of aqueous solution of commercial azo textile dye, direct red 23 (DR23), was carried out in TiO2 suspension at 30°C with the use of artificial and solar light sources. The photoreaction followed the first-order behavior with respect to the azo dye as a function of irra...

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Autores principales:	CLAUSEN,DÉBORA N, SCARMÍNIO,IEDA S, TAKASHIMA,KEIKO
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2009
Materias:	degradation direct red 23 inorganic oxidant photocatalysis factorial design
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072009000300018
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spelling	oai:scielo:S0717-970720090003000182010-03-17OPTIMIZATION AND EFFECTS OF SOME ELECTRON ACCEPTORS ON THE PHOTOCATALYTIC DEGRADATION OF DIRECT RED 23 AZO DYECLAUSEN,DÉBORA NSCARMÍNIO,IEDA STAKASHIMA,KEIKO degradation direct red 23 inorganic oxidant photocatalysis factorial design The photocatalytic degradation of aqueous solution of commercial azo textile dye, direct red 23 (DR23), was carried out in TiO2 suspension at 30°C with the use of artificial and solar light sources. The photoreaction followed the first-order behavior with respect to the azo dye as a function of irradiation time. A 2³ factorial design was carried out, in order to obtain the best experimental conditions, using the rate constant of DR23 degradation as the analytical response. Seven chemical species were determined from the normalized UV-Vis spectra during the DR23 degradation through Imbrie Q mode factor analysis followed by varimax and Imbrie oblique rotations. The addition of electron acceptors, such as H2O2, S2Os2-, and ClO3- on the optimized conditions, was carried out to increase the DR23 degradation rate. Comparison of degradation efficiencies under artificial and solar radiation was examined in the presence of oxidants.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.54 n.3 20092009-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072009000300018en10.4067/S0717-97072009000300018
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	degradation direct red 23 inorganic oxidant photocatalysis factorial design
spellingShingle	degradation direct red 23 inorganic oxidant photocatalysis factorial design CLAUSEN,DÉBORA N SCARMÍNIO,IEDA S TAKASHIMA,KEIKO OPTIMIZATION AND EFFECTS OF SOME ELECTRON ACCEPTORS ON THE PHOTOCATALYTIC DEGRADATION OF DIRECT RED 23 AZO DYE
description	The photocatalytic degradation of aqueous solution of commercial azo textile dye, direct red 23 (DR23), was carried out in TiO2 suspension at 30°C with the use of artificial and solar light sources. The photoreaction followed the first-order behavior with respect to the azo dye as a function of irradiation time. A 2³ factorial design was carried out, in order to obtain the best experimental conditions, using the rate constant of DR23 degradation as the analytical response. Seven chemical species were determined from the normalized UV-Vis spectra during the DR23 degradation through Imbrie Q mode factor analysis followed by varimax and Imbrie oblique rotations. The addition of electron acceptors, such as H2O2, S2Os2-, and ClO3- on the optimized conditions, was carried out to increase the DR23 degradation rate. Comparison of degradation efficiencies under artificial and solar radiation was examined in the presence of oxidants.
author	CLAUSEN,DÉBORA N SCARMÍNIO,IEDA S TAKASHIMA,KEIKO
author_facet	CLAUSEN,DÉBORA N SCARMÍNIO,IEDA S TAKASHIMA,KEIKO
author_sort	CLAUSEN,DÉBORA N
title	OPTIMIZATION AND EFFECTS OF SOME ELECTRON ACCEPTORS ON THE PHOTOCATALYTIC DEGRADATION OF DIRECT RED 23 AZO DYE
title_short	OPTIMIZATION AND EFFECTS OF SOME ELECTRON ACCEPTORS ON THE PHOTOCATALYTIC DEGRADATION OF DIRECT RED 23 AZO DYE
title_full	OPTIMIZATION AND EFFECTS OF SOME ELECTRON ACCEPTORS ON THE PHOTOCATALYTIC DEGRADATION OF DIRECT RED 23 AZO DYE
title_fullStr	OPTIMIZATION AND EFFECTS OF SOME ELECTRON ACCEPTORS ON THE PHOTOCATALYTIC DEGRADATION OF DIRECT RED 23 AZO DYE
title_full_unstemmed	OPTIMIZATION AND EFFECTS OF SOME ELECTRON ACCEPTORS ON THE PHOTOCATALYTIC DEGRADATION OF DIRECT RED 23 AZO DYE
title_sort	optimization and effects of some electron acceptors on the photocatalytic degradation of direct red 23 azo dye
publisher	Sociedad Chilena de Química
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072009000300018
work_keys_str_mv	AT clausendeboran optimizationandeffectsofsomeelectronacceptorsonthephotocatalyticdegradationofdirectred23azodye AT scarminioiedas optimizationandeffectsofsomeelectronacceptorsonthephotocatalyticdegradationofdirectred23azodye AT takashimakeiko optimizationandeffectsofsomeelectronacceptorsonthephotocatalyticdegradationofdirectred23azodye
_version_	1718445408995246080

OPTIMIZATION AND EFFECTS OF SOME ELECTRON ACCEPTORS ON THE PHOTOCATALYTIC DEGRADATION OF DIRECT RED 23 AZO DYE

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