Electrochemical property of methylene blue redox dye immobilized on porous silica-zirconia-antimonia mixed oxide

dc.creatorZaitseva, G
dc.creatorGushikem, Y
dc.creatorRibeiro, ES
dc.creatorRosatto, SS
dc.date2002
dc.dateFEB 15
dc.date2014-11-18T12:25:18Z
dc.date2015-11-26T16:54:50Z
dc.date2014-11-18T12:25:18Z
dc.date2015-11-26T16:54:50Z
dc.date.accessioned2018-03-28T23:42:09Z
dc.date.available2018-03-28T23:42:09Z
dc.identifierElectrochimica Acta. Pergamon-elsevier Science Ltd, v. 47, n. 9, n. 1469, n. 1474, 2002.
dc.identifier0013-4686
dc.identifierWOS:000174724100014
dc.identifier10.1016/S0013-4686(01)00870-2
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/65185
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/65185
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/65185
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1276965
dc.descriptionThe mixed oxide SiO2/ZrO2 obtained by the sol-gel processing method adsorbs Sb(V) from acid solution, forming a new phase on the matrix surface designated as SiO2/ZrO2/Sb2O5. The amount of Zr(IV) in the matrix was 8.1 wt.%, corresponding to 0.89 mmol g(-1), and the amount of Sb(V) incorporated in the matrix was 6.3 wt.% (0.52 mmol g(-1)). This material presented a specific surface area, S-BET = 590 m(2) g(-1). The immobilized Sb2O5 is a good cation exchanger and adsorbs methylene blue (MB) cationic dye with an average surface density delta = 1.1 x 10(-11) mol cm(-2) (about 0.07 molecule nm(-2)). The dye is strongly entrapped in the pores of the matrix and it is not leached off in KCl solutions as concentrated as 1.0 M. A carbon paste of the SiO2/ZrO2/Sb2O5/MB material showed a reversible redox pair with midpoint potential E-m = -0.1 V versus SCE. This midpoint potential is not affected by solution pH change between 2 and 7. The immobilized dye mediated NADH catalytic oxidation at ca. 50 mV. (C) 2002 Elsevier Science Ltd. All rights reserved.
dc.description47
dc.description9
dc.description1469
dc.description1474
dc.languageen
dc.publisherPergamon-elsevier Science Ltd
dc.publisherOxford
dc.publisherInglaterra
dc.relationElectrochimica Acta
dc.relationElectrochim. Acta
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectsilica-zirconia-antimonia
dc.subjectsol-gel processing
dc.subjectmethylene blue
dc.subjectmodified carbon paste electrode
dc.subjectNADH electrocatalytic oxidation
dc.subjectCarbon-paste Electrodes
dc.subjectElectrocatalytic Oxidation
dc.subjectPhosphate
dc.subjectNadh
dc.subjectPhenothiazines
dc.subjectPhenoxazines
dc.subjectAggregation
dc.subjectRiboflavin
dc.titleElectrochemical property of methylene blue redox dye immobilized on porous silica-zirconia-antimonia mixed oxide
dc.typeArtículos de revistas


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