Title
Niobium oxide dispersed on a carbon-ceramic matrix, SiO2/C/ Nb2O5, used as an electrochemical ascorbic acid sensor
Date Issued
15 November 2010
Access level
metadata only access
Resource Type
journal article
Author(s)
Instituto de QuÃmica
Publisher(s)
Elsevier B.V.
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/Nb 2O5, 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. © 2010 Elsevier B.V.
Start page
241
End page
248
Volume
83
Issue
1
Language
English
OCDE Knowledge area
ElectroquÃmica
Subjects
Scopus EID
2-s2.0-78049355385
Source
Talanta
ISSN of the container
00399140
Sponsor(s)
The authors thank FAPESP for fellowships L.T.A., process 06/61214-4 and financial support. They also thank the Brazilian Synchrotron Light Laboratory (LNLS) for the AFM/EFM measurements and are grateful to Prof. Carol H. Collins for manuscript review.
Sources of information:
Directorio de Producción CientÃfica
Scopus