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dc.contributor.authorCarmo, Devaney Ribeiro do [UNESP]
dc.contributor.authorSouza, Tamires Rocha [UNESP]
dc.contributor.authorMaraldi, Vitor Alexandre [UNESP]
dc.contributor.authorSerantoni da Silveira, Tayla Fernanda [UNESP]
dc.identifier.citationElectrocatalysis. New York: Springer, v. 9, n. 6, p. 706-715, 2018.
dc.description.abstractThis study demonstrates an additional exploration of the possibilities of modifying the surface of spongolite spicules, a biogenic silica, in order to prepare natural inorganic composites for application in catalytic oxidation processes. In this context, a novel hybrid material was synthesized from the inorganofunctionalization of a spongolite with zirconium(IV) (EZr). This material was then reacted with potassium hexacyanoferrate(III) and applied in a subsequent reaction with copper ions. The obtained material (EZrCuH) was characterized by scanning electron microscopy (SEM), infrared spectroscopy (FT-IR), and cyclic voltammetry (CV). The CV of the graphite paste modified with EZrCuH exhibited two redox couples with midpoint potentials (E-theta,E-) equal to 0.36 and 0.74 V, attributed to the Cu-I/Cu-II and Fe-II(CN)(6)/Fe-III(CN)(6) processes (1.0 mol L-1, KCl pH 7.0, v = 20 mV s(-1)), respectively. The EZrCuH-modified graphite paste electrode presented electrocatalytic activity in the oxidation of different hydrazine concentrations and an analytical curve with a linear response of 8.0 x 10(-7) to 4.0 x 10(-5) mol L-1 (R-2 = 0.999, relative standard deviation = +/- 2% (n = 3)), and limit of detection of 8.33 x 10(-7) mol L-1 and an amperometric sensitivity of 8.21 mA mol(-1) L-1. Therefore, this material can be considered as a potential candidate for the manufacturing of electrochemical sensors intended for the easy and rapid detection of hydrazine substances.en
dc.sourceWeb of Science
dc.subjectGraphite paste electrode
dc.titlePreparation and Voltammetric Application of a Zr(IV) Functionalized Spongolite for the Electrocatalytic Oxidation of Hydrazineen
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Federal de Mato Grosso do Sul (UFMS)
dc.description.affiliationUniv Estadual Paulista, Fac Engn Ilha Solteira, Dept Quim & Fis, Ave Brasil 56, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationUniv Fed Mato Grosso do Sul, Inst Quim, Ave Senador Filinto Muller 1555, BR-79074460 Campo Grande, MS, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Fac Engn Ilha Solteira, Dept Quim & Fis, Ave Brasil 56, BR-15385000 Ilha Solteira, SP, Brazil
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