Applied Chemistry Today

Applied Chemistry Today

Electrochemical preparation and characterization of polyaniline/ graphene quantum dot films to electro-oxidation of ascorbic acid

Document Type : Original Article

Authors
Mohammad Dinari
Mohamad Mohsen Momeni
Meysam Goudarzirad
10.22075/chem.2015.2810
Abstract
Polyaniline-Graphene Quantum Dot/gold nanoparticles (Au/PANI-GQD) films were prepared by tow step electrochemical process. At the first step, mixture of aniline and GQD was heated and refluxed then electopolymrization performed. At the second step gold’s nanoparticles were dispersed on the surface of PANI-GQD film from galvanostatic condition in the bath containing KAu(CN)2. The electrochemical behaviorand electro-catalytic activity of Au/PANI-GQD electrode werecharacterized by cyclic voltammetry. The morphology of the PANI-GQD film and gold coating on this electrode were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) respectively. Results indicated that gold nanoparticles were homogeneously dispersed on the surface of polyanilinefilm. The electro-oxidation of ascorbic acid is found to proceed more facile on Au/PANI-GQD electrode than on bare gold electrode. The irreversible oxidation current of ascorbic acid exhibits a linear dependence on the ascorbic acid concentration in the range of 1–5 mM.
Applied Chemistry Today
Volume 10, Issue 36
Autumn 2015
Pages 97-106