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Title of article :
Niobium oxide dispersed on a carbon–ceramic matrix, SiO2/C/Nb2O5, used as an electrochemical ascorbic acid sensor
Author/Authors :
Arenas، نويسنده , , Leliz T. and Villis، نويسنده , , Paulo C.M. and Arguello، نويسنده , , Jacqueline and Landers، نويسنده , , Richard and Benvenutti، نويسنده , , Edilson V. and Gushikem، نويسنده , , Yoshitaka، نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 2010
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Abstract :
A film of niobium oxide was immobilized on a SiO2/C carbon–ceramic matrix (specific surface area 270 m2 g−1) and characterized by N2 adsorption–desorption isotherms, scanning electron microscopy, X-ray photoelectron spectroscopy and atomic force microscopy. This new carbon–ceramic material, SiO2/C/Nb2O5, 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.
Keywords :
Vitamin C sensor , Carbon–ceramic electrode , Sol–gel , Silica niobia composite
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