Artículos de revistas
Carbon nanotubes modified with antimony nanoparticles: A novel material for electrochemical sensing
Fecha
2012Registro en:
ELECTROCHIMICA ACTA, OXFORD, v. 85, n. 12, supl. 4, Part 1-2, pp. 560-565, DEC 15, 2012
0013-4686
10.1016/j.electacta.2012.08.123
Autor
Moraes, Fernando C.
Cesarino, Ivana
Cesarino, Vivian
Mascaro, Lucia H.
Machado, Sergio Antonio Spinola
Institución
Resumen
In this study, a novel material for the electrochemical determination of bisphenol A using a nanocomposite based on multi-walled carbon nanotubes modified with antimony nanoparticles has been investigated. The morphology, structure, and electrochemical performance of the nanocomposite electrodes were characterised by field emission gun scanning electron microscopy, energy-dispersive X-ray spectroscopy, and cyclic voltammetry. A scan rate study and electrochemical impedance spectroscopy showed that the bisphenol A oxidation product is adsorbed on nanocomposite electrode surface. Differential pulse voltammetry in phosphate buffer solution at pH 6, allowed the development of a method to determine bisphenol A levels in the range of 0.5-5.0 mu mol L-1, with a detection limit of 5.24 nmol L-1 (1.19 mu g L-1). (C) 2012 Elsevier Ltd. All rights reserved.