KNUSTSpace >
Research Articles >
College of Science >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/123456789/13554
|
Title: | EFFECT OF PRIMARY DOPANTS ON THE CONDUCTIVITY OF POLYANILINE SYNTHESIZED BY ELECTROCHEMICAL POLYMERIZATION |
Authors: | Nunoo, O. A. Awuah, Joseph Asare Abavare, E.K.K. Singh, K. |
Keywords: | Conductivity Electrochemical Polymerization |
Issue Date: | 2019 |
Publisher: | International Journal of Advanced Research in Engineering and Technology |
Abstract: | Polyaniline salts were synthesized at room temperature (300 C) by electrochemical
oxidation using primary dopants such as HCL, HNO3, H2SO4 and CH3COOH. All the
synthesized PANI have resulted in emeraldine salt form as indicated by dark green
colour of the salts. Various characterization techniques employed were UV-Visible
spectroscopy, FT-IR and Cyclic voltammetry studies. All these techniques confirm the
various properties of PANI. The characteristic peaks in the UV-Visible spectra of the
samples indicate that effective doping has occurred in the synthesized polymer
polymers. Quinoid and benzenoid bands at 1553-1596 cm-1 and 1437 – 1496 cm-1
respectively were observed in all the samples. The band gaps for all the samples were
obtained using the absorption spectra and Stern relation. PANI-H2SO4 had the least
band gap whereas PANI-CH3COOH had the highest band gap. The voltammograph
showed the various oxidation states during the electrochemical deposition at a
potential of 0.8 V. Four probe Method was used to study the conductivity of both thin
films deposited on ITO slides. The conductivity values for PANI-H2SO4 were found to
be 3.424 S.cm−1for thin film. By comparing the four samples’ π - π* transition, from
the strongest to the weakest were in the order: , PANI-H2SO4 followed by PANI-HCl
then PANI-HNO3 and the weakest been PANI-CH3COOH. This suggests that polaron
charge carriers are responsible for the high conductivity in H2SO4 doped PANI. |
Description: | This article is published in International Journal of Advanced Research in Engineering and Technology |
URI: | http://hdl.handle.net/123456789/13554 |
ISSN: | 0976-6499 |
Appears in Collections: | College of Science
|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
|