Electrochemical characterization of the nano Py/DDS/SiO2 film on a copper electrode
Elektrokemijska karakterizacija nanoplasti Py/DDS/SiO2 na bakreni elektrodi

english

2013

volume 47, issue 3

4.4'-diaminodiphenyl sulfone   cyclic voltammetry    nanosize   copper electrode

Inštitut za kovinske materiale in tehnologije
(Obvezni izvod spletne publikacije)

The electroactive copolymer of pyrrole (Py) and 4.4'-diaminodiphenyl sulfone (DDS) was synthesized electrochemically in 4 M H2SO4 and ethanol medium. Both electrochemical synthesis and characterization of the copolymer deposited on acopper electrode were carried out using cyclic voltammetry. The voltammograms exhibited different patterns of behavior with different feed concentrations of Py. Equimolar concentrations of Py and DDS demonstrated a very efficient growth of the copolymer film on the surface of the copper. The scan rate exerted little effect on this copper copolymer film, revealing the film excellent electroactive adherent properties. The effect of pH on the copolymer film showed that the polymer was electrochemically active up to pH 7.0. A spectroelectrochemical analysis of the copolymer film, carried out on an indium tin oxide (ITO) plate, showed multicolor electrochromic behavior when the applied potential was changed. The polymer was characterized with the UV-Vis and FTIR spectral studies. The formation of the polymer through the N-H group was understood from the single N-H stretching vibrational frequency at 3050 cmsup-1. The surface morphology was studied using a SEM analysis and the grain size of the copolymer was measured using XRD studies and was found to be 50 nm. The electrical conductivity of the copolymer was 5.98 x 10sup 10sup{-2} S cmsup-1, as determined using a four-probe conductivity meter.

09.05.2014