Niobium oxide dispersed on a carbon-ceramic matrix, SiO2/C/Nb2O5, used as an electrochemical ascorbic acid sensor

Autor(es)

Arenas, Leliz T. ^[1] ; Villis, Paulo C. M. ^[1] ; Arguello, Jacqueline ^[2] ; Landers, Richard ^[3] ; Benvenutti, Edilson V. ^[2] ; Gushikem, Yoshitaka ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Chem, Campinas, SP - Brazil

^[2] Univ Fed Rio Grande do Sul, Inst Chem, Porto Alegre, RS - Brazil

^[3] Univ Estadual Campinas, Inst Phys Gleb Wataghin, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Talanta; v. 83, n. 1, p. 241-248, NOV 15 2010.
• Citações Web of Science: 21

Resumo

A film of niobium oxide was immobilized on a SiO(2)/C carbon-ceramic matrix (specific surface area 270 m(2) g(-1)) and characterized by N(2) adsorption-desorption isotherms scanning electron microscopy X-ray photoelectron spectroscopy and atomic force microscopy This new carbon-ceramic material SiO(2)/C/Nb(2)O(5) was used for construction of electrodes and it shows ability to improve the electron-transfer between the electrode surface and ascorbic acid The electrocatalytic oxidation of ascorbic acid was made by differential pulse and cyclic voltammetry techniques making It potentially useful for developing a new ascorbic acid sensor (C) 2010 Elsevier B V All rights reserved (AU)

• Processo FAPESP: 06/61214-4 - Preparacao, caracterizacao e propriedades do composito ternario sio2/nb2o5/c-grafite.
• Beneficiário: Leliz Ticona Arenas
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado