Voltammetric cadmium(II) sensor based on a fluorine doped tin oxide electrode modified with polyamide 6/chitosan electrospun nanofibers and gold nanoparticles

Author(s)

Migliorini, Fernanda L. ; Sanfelice, Rafaela C. ; Pavinatto, Adriana ; Steffens, Juliana ; Steffens, Clarice ; Correa, Daniel S.

• Document type: Journal article
• Source: Microchimica Acta; v. 184, n. 4, p. 1077-1084, APR 2017.
• Web of Science Citations: 4

Abstract

The authors have developed an electrochemical sensor for cadmium(II) that is based on the use of a conventional fluorine doped tin oxide (FTO) electrode modified with polymeric electrospun nanofibers consisting of polyamide 6 (PA6) and chitosan which were further modified with gold nanoparticles (AuNPs). The materials were characterized by infrared spectroscopy, thermal analysis (DSC and TGA), and scanning electron microscopy. The modified electrode was applied to the detection of Cd(II) by square wave voltammetry. Response is linear in the 25 to 75 mu g ai... L-1 Cd(II) concentration range, with a detection limit of 0.88 mu g ai... L-1. The relative standard deviations are 4.6% and 8.2% for intra- and inter-electrode measurements, respectively. Mercury(II), lead(II), and copper(II) did not significantly interfere. (AU)

• FAPESP's process: 13/26712-7 - Development of nanostructured biosensors for the detection of endocrine disruptors in aquaculture
• Grantee: Adriana Pavinatto da Costa
• Support type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 14/16789-5 - Hybrid nanostructured materials based on conjugated polymers and metallic nanoparticles for sensor applications
• Grantee: Daniel Souza Corrêa
• Support type: Regular Research Grants