Voltammetric studies of cobalt hexacyanoferrate formed on the titanium (IV) phosphate surface and its application to the determination of sulfite

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorCumba, Loanda Raquel-
Autor(es): dc.creatorBicalho, Urquisa de Oliveira-
Autor(es): dc.creatordo Carmo, Devaney Ribeiro-
Data de aceite: dc.date.accessioned2025-08-21T18:34:00Z-
Data de disponibilização: dc.date.available2025-08-21T18:34:00Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2012-03-01-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/226741-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/226741-
Descrição: dc.descriptionTitanium (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 Θ') = 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 Θ' = 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 2.0×10 -3 to 1.0×10 -2 mol L -1 with the corresponding equation Y(μA) = 24.78 + 8.56 × 10 3 [Sulfite], and a correlation coefficient of r = 0.997. The method showed a detection limit of 6.51×10 -4 mol L -1 with a relative standard deviation of ± 5% (n = 3) and amperometric sensitivity of 9.19×10 -3 A mol L -1. © 2012 by ESG.-
Descrição: dc.descriptionFaculdade de Engenharia de Ilha Solteira UNESP - Univ Estadual Paulista Departamento de Física e Química, Av. Brasil Centro, 56, CEP 15385-000, Ilha Solteira, SP-
Descrição: dc.descriptionFaculdade de Engenharia de Ilha Solteira UNESP - Univ Estadual Paulista Departamento de Física e Química, Av. Brasil Centro, 56, CEP 15385-000, Ilha Solteira, SP-
Formato: dc.format2123-2135-
Idioma: dc.languageen-
Relação: dc.relationInternational Journal of Electrochemical Science-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCobalte hexacyanoferrate-
Palavras-chave: dc.subjectGraphite paste electrode-
Palavras-chave: dc.subjectTitanium phosfate-
Palavras-chave: dc.subjectVoltammetry-
Título: dc.titleVoltammetric studies of cobalt hexacyanoferrate formed on the titanium (IV) phosphate surface and its application to the determination of sulfite-
Tipo de arquivo: dc.typelivro digital-
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