A modified hybrid silsesquioxane/histidine composite for copper and zinc adsorption and it behavior in the electro-oxidation of ascorbic acid

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorFranco, Fernanda dos Santos [UNESP]-
Autor(es): dc.creatorFernandes, Daniela Silvestrini [UNESP]-
Autor(es): dc.creatorDo Carmo, Devaney Ribeiro [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:10:28Z-
Data de disponibilização: dc.date.available2022-02-22T00:10:28Z-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-06-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.msec.2020.110739-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/196800-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/196800-
Descrição: dc.descriptionOcta-(3-chloropropryl)silsesquioxane was chemically modified with histidine (SSQ-H) and characterized by spectroscopy in the infrared region (FT-IR), X-ray diffraction (XRD), X-ray Dispersive Energy Spectroscopy (EDX), Scanning Electron Microscopy (SEM). The analytical properties of SSQ-H were tested regarding of Cu2+ and Zn2+ adsorption and as an electrochemical sensor for the detection of ascorbic acid. The metal sorption results indicate that maximum amount of Cu2+ and Zn2+ adsorbed (Nf(max)) were 1.58 x 10(-3) and 5.67 x 10(-4) mol g(-1), respectively. After Cu2+ and Zn2+ ion adsorption and interaction with potassium hexacyanoferrate (III), the investigated materials displayed electroactivity for ascorbic acid detection. The anodic peak currents responses of a graphite paste electrode containing CuHCFSSQ-H presented a linear response in the concentration range of 4.0 x 10(-4) to 4.0 x 10(-3) mol L-1 for ascorbic acid detection. The limit of detection was of 2.99 x 10(-4) mol L-1, with an amperometric sensitivity of 1.69 mu A/mol L-1. The intensity of the anodic peak currents of the graphite paste electrode containing ZnHCFSSQ-H in the concentration range of 9.0 x 10(-5) to 9.0 x 10(-4) mol L-1 also displayed a linear response. The limit of detection was of 6.76 x 10(-5) mol L-1, with an amperometric sensitivity of 0.0206 A/mol L-1.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionUniv Estadual Paulista, Fac Engn Ilha Solteira, Dept Fis & Quim, Av Brasil 56, BR-15385000 Ilha Solteira, SP, Brazil-
Descrição: dc.descriptionUniv Estadual Paulista, Fac Engn Ilha Solteira, Dept Fis & Quim, Av Brasil 56, BR-15385000 Ilha Solteira, SP, Brazil-
Descrição: dc.descriptionFAPESP: 2015/20397-
Formato: dc.format11-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier B.V.-
Relação: dc.relationMaterials Science & Engineering C-materials For Biological Applications-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectChemical synthesis-
Palavras-chave: dc.subjectInfrared spectroscopy-
Palavras-chave: dc.subjectX-ray diffraction-
Palavras-chave: dc.subjectElectrochemical properties-
Palavras-chave: dc.subjectSurface properties-
Título: dc.titleA modified hybrid silsesquioxane/histidine composite for copper and zinc adsorption and it behavior in the electro-oxidation of ascorbic acid-
Tipo de arquivo: dc.typelivro digital-
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