Voltammetric Studies of Cobalt Hexacyanoferrate Formed on the Titanium (IV) Phosphate Surface and its Application to the Determination of Sulfite

dc.contributor.authorCumba, Loanda Raquel [UNESP]
dc.contributor.authorBicalho, Urquisa de Oliveira [UNESP]
dc.contributor.authordo Carmo, Devaney Ribeiro [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:29:56Z
dc.date.available2014-05-20T13:29:56Z
dc.date.issued2012-03-01
dc.description.abstractTitanium (IV) Phosphate (TiPh) composite was prepared using a easily methodology of the synthesis. As a second step, TiPh was reacted with Cobalte (TiPhCo) and subsequent hexacyanoferrate was added (TiPhCoHCF). A preliminary characterization of the precursor and resulting materials was carried out using spectroscopic and voltammetric techniques. The electrochemical behaviour of the composite (TiPhCoHCF) was verified by means of a graphite paste electrode using cyclic voltammetry in a potential range of -0.2 to 1.0 V (vs Ag/AgCl). The cyclic voltammogram of the modified electrode containing TiPhCoHCF exhibited two redox couples. The first process (peak I) presented a formal potential (E-theta') = 0.37 V vs Ag/AgCl attributed to the redox process Co-(II) / Co-(III) and other more defined redox couple, (peak II), showed a E theta' = 0.67 V vs Ag/AgCl which was attributed to the redox process [Fe-(II)(CN)(6)] /[Fe-(III)(CN)(6)]. The second redox couple exhibited an electrocatalytic activity towards the oxidation of sulfite. The titanium phosphate modified graphite paste electrode showed a linear response from 2.0 x 10(-3) to 1.0 x 10(-2) mol L-1 with the corresponding equation Y(mu A) = 24.78 + 8.56 x 10(3) [Sulfite], and a correlation coefficient of r = 0.997. The method showed a detection limit of 6.51 x 10(-4) mol L-1 with a relative standard deviation of +/- 5% (n = 3) and amperometric sensitivity of 9.19 x 10(-3) A mol L-1en
dc.description.affiliationUniv Estadual Paulista, UNESP, Fac Engn Ilha Solteira, Dept Fis & Quim, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, UNESP, Fac Engn Ilha Solteira, Dept Fis & Quim, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipIdFAPESP: 03/12882-6
dc.format.extent2123-2135
dc.identifierhttp://www.electrochemsci.org/papers/vol7/7032123.pdf
dc.identifier.citationInternational Journal of Electrochemical Science. Belgrade: Electrochemical Science Group, v. 7, n. 3, p. 2123-2135, 2012.
dc.identifier.fileWOS000302730300031.pdf
dc.identifier.issn1452-3981
dc.identifier.lattes1614745697870003
dc.identifier.lattes0545046720519536
dc.identifier.urihttp://hdl.handle.net/11449/10149
dc.identifier.wosWOS:000302730300031
dc.language.isoeng
dc.publisherElectrochemical Science Group
dc.relation.ispartofInternational Journal of Electrochemical Science
dc.relation.ispartofjcr1.369
dc.relation.ispartofsjr0,366
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectTitanium phosfateen
dc.subjectcobalte hexacyanoferrateen
dc.subjectvoltammetryen
dc.subjectgraphite paste electrodeen
dc.titleVoltammetric Studies of Cobalt Hexacyanoferrate Formed on the Titanium (IV) Phosphate Surface and its Application to the Determination of Sulfiteen
dc.typeArtigo
dcterms.licensehttp://www.electrochemsci.org/instruction.htm
dcterms.rightsHolderElectrochemical Science Group
unesp.author.lattes1614745697870003
unesp.author.lattes0545046720519536
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Ilha Solteirapt

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