Synthesis and characterization of alpha-nickel (II) hydroxide particles on organic-inorganic matrix and its application in a sensitive electrochemical sensor for vitamin D determination

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dc.contributor.authorCanevari, Thiago da Cruz [UNESP]
dc.contributor.authorCincotto, Fernando Henrique [UNESP]
dc.contributor.authorLanders, Richard
dc.contributor.authorMachado, Sergio Antonio Spinola [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.date.accessioned2015-03-18T15:53:26Z
dc.date.available2015-03-18T15:53:26Z
dc.date.issued2014-11-20
dc.description.abstractThis paper describes the synthesis, characterization and application of amorphous nickel (II) hydroxide particles, alpha-Ni(OH)(2), onto a hybrid material composed of silica and graphene oxide, SiO2/GO. The sol-gel process using HF as the catalyst was used to obtain this organic-inorganic matrix. The Ni(OH)(2) were prepared directly on the surface of the matrix using nickel (II) acetate and N, N-dimethylformamide (DMF) as a solvent. The SiO2/GO/Ni(OH)(2) material was characterized by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS) and electrochemical techniques. A glassy carbon electrode modified with the SiO2/GO/Ni(OH)(2) material was used in the development of a sensitive electrochemical sensor for the determination of vitamin D-3 by pulse differential voltammetry. A well-defined electro-oxidation peak of vitamin D-3 was observed in sodium hydroxide at pH 13. The results indicated that the resultant SiO2/GO/Ni(OH)(2) modified electrode is highly selective and very sensitive with a limit of detection, in pure laboratory solutions of 3.26 x 10(-9) mol dm(-3); therefore, it can be used to detect vitamin D3 in real samples. (C) 2014 Elsevier Ltd. All rights reserved.en
dc.description.affiliationState Univ Sao Paulo, Inst Chem, BR-13560970 Sao Carlos, SP, Brazil
dc.description.affiliationUniv Estadual Campinas, Gleb Wataghin Inst Phys, Campinas, SP, Brazil
dc.description.affiliationUnespState Univ Sao Paulo, Inst Chem, BR-13560970 Sao Carlos, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 11/23047-7
dc.description.sponsorshipIdFAPESP: 12/18339-1
dc.format.extent688-695
dc.identifierhttp://dx.doi.org/10.1016/j.electacta.2014.10.012
dc.identifier.citationElectrochimica Acta. Oxford: Pergamon-elsevier Science Ltd, v. 147, p. 688-695, 2014.
dc.identifier.doi10.1016/j.electacta.2014.10.012
dc.identifier.issn0013-4686
dc.identifier.urihttp://hdl.handle.net/11449/116512
dc.identifier.wosWOS:000346178800087
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofElectrochimica Acta
dc.relation.ispartofjcr5.116
dc.relation.ispartofsjr1,439
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectElectrochemical sensoren
dc.subjectgraphene oxideen
dc.subjecthybrid materialsen
dc.subjectnickel hydroxideen
dc.subjectVitamin Den
dc.titleSynthesis and characterization of alpha-nickel (II) hydroxide particles on organic-inorganic matrix and its application in a sensitive electrochemical sensor for vitamin D determinationen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências, Baurupt
unesp.departmentQuímica - FCpt

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