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Carbon nanotubes modified with antimony nanoparticles: A novel material for electrochemical sensing

2012; Elsevier BV; Volume: 85; Linguagem: Inglês

10.1016/j.electacta.2012.08.123

1873-3859

Fernando C. Moraes, Ivana Cesarino, Vivian Cesarino, Lúcia H. Mascaro, Sérgio Antônio Spínola Machado,

Effects and risks of endocrine disrupting chemicals

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 μmol L−1, with a detection limit of 5.24 nmol L−1 (1.19 μg L−1).