Voltammetric Studies of Cobalt Hexacyanoferrate Formed on the Titanium (IV) Phosphate Surface and its Application to the Determination of Sulfite
dc.contributor.author | Cumba, Loanda Raquel [UNESP] | |
dc.contributor.author | Bicalho, Urquisa de Oliveira [UNESP] | |
dc.contributor.author | do Carmo, Devaney Ribeiro [UNESP] | |
dc.contributor.institution | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-05-20T13:29:56Z | |
dc.date.available | 2014-05-20T13:29:56Z | |
dc.date.issued | 2012-03-01 | |
dc.description.abstract | Titanium (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-1 | en |
dc.description.affiliation | Univ Estadual Paulista, UNESP, Fac Engn Ilha Solteira, Dept Fis & Quim, BR-15385000 Ilha Solteira, SP, Brazil | |
dc.description.affiliationUnesp | Univ Estadual Paulista, UNESP, Fac Engn Ilha Solteira, Dept Fis & Quim, BR-15385000 Ilha Solteira, SP, Brazil | |
dc.description.sponsorship | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | |
dc.description.sponsorship | Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) | |
dc.description.sponsorshipId | FAPESP: 03/12882-6 | |
dc.format.extent | 2123-2135 | |
dc.identifier | http://www.electrochemsci.org/papers/vol7/7032123.pdf | |
dc.identifier.citation | International Journal of Electrochemical Science. Belgrade: Electrochemical Science Group, v. 7, n. 3, p. 2123-2135, 2012. | |
dc.identifier.file | WOS000302730300031.pdf | |
dc.identifier.issn | 1452-3981 | |
dc.identifier.lattes | 1614745697870003 | |
dc.identifier.lattes | 0545046720519536 | |
dc.identifier.uri | http://hdl.handle.net/11449/10149 | |
dc.identifier.wos | WOS:000302730300031 | |
dc.language.iso | eng | |
dc.publisher | Electrochemical Science Group | |
dc.relation.ispartof | International Journal of Electrochemical Science | |
dc.relation.ispartofjcr | 1.369 | |
dc.relation.ispartofsjr | 0,366 | |
dc.rights.accessRights | Acesso aberto | |
dc.source | Web of Science | |
dc.subject | Titanium phosfate | en |
dc.subject | cobalte hexacyanoferrate | en |
dc.subject | voltammetry | en |
dc.subject | graphite paste electrode | en |
dc.title | Voltammetric Studies of Cobalt Hexacyanoferrate Formed on the Titanium (IV) Phosphate Surface and its Application to the Determination of Sulfite | en |
dc.type | Artigo | |
dcterms.license | http://www.electrochemsci.org/instruction.htm | |
dcterms.rightsHolder | Electrochemical Science Group | |
unesp.author.lattes | 1614745697870003 | |
unesp.author.lattes | 0545046720519536 | |
unesp.campus | Universidade Estadual Paulista (Unesp), Faculdade de Engenharia, Ilha Solteira | pt |
unesp.department | Física e Química - FEIS | pt |
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