Abstract

In the present study, V2O5@polyaniline (V2O5@PANI) nanohybrid was prepared by oxidative polymerization approach in presence of colloidal V2O5. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV-Visible spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) reveal that there is an interaction happened between V2O5 and PANI. Plausible explanation for the formation of V2O5@PANI nanohybrid has been explained. The electrochemical oxidation of DA was examined by cyclic voltammetry (CV) and chronoamperometry (CA). The V2O5@PANI modified GC electrode (V2O5@PANI/GCE) showed electrocatalytic oxidation of DA in the linear range from 6.6 x 10(-6) M to 1.1 x 10(-4) M with the detection limit of 3.9 x 10(-5) M. The proposed sensor method showed good sensitivity, stability and repeatability. (C) 2014 Elsevier B.V. All rights reserved.