Abstract:
The purpose of this research project is to modify the glassy carbon electrode (GCE) with
copper polyaniline (Cu-PANI) to electrochemically detection of 4-aminophenol. Therefore,
copper polyaniline (Cu-PANI) is synthesized through chemical oxidation polymerization, and
then copper (Cu) is injected into the polyaniline. Copper nanoparticles interact with the
mobile groups of polyanilines through electrostatic force (van der Waals force). Fourier
transform infrared (FT-IR) studies confirmed the presence of functional groups in the
synthesized nanocomposites, energy dispersive x-ray (EDX) confirmed the Cu doping into
polyaniline and composition of nanocomposites, scanning electron microscope (SEM)
confirmed the morphology of Polyaniline (PANI), and size of the Cu-PANI morphology. In
cyclic voltammetry (CV), modified (Cu-PANI)/GCE electrode behaviour showed toward 4-
AP was studied in the presence of supporting electrolyte (0.1 M H2SO4) with optimized
potential window range (0.2 to 0.8 V) at 50mV/s scan rate. The electron transfer was the
study of Cu-PANI/GCE at 0.52V oxidation peak and with different concentration as well.
The qualitative technique differential pulse voltammetry (DPV) was performed to determine
the linear response (5µM to 2mM) of 4-AP with lower limit detection is 10µM. The Cu PANI/GCE showed sensitivity and selectivity for 4-AP and even in the presence of organic
interference species. This improved electrode is cheap, robust, selective, and sensitive, and
has an excellent volume to surface ratio. Therefore, the produced electrochemical sensor has
good sample analyzer activity and is equally effective in analyzer sewage, tap-water, and
industrial wastewater as well
