DOI: https://doi.org/10.59321/BAUETJ.V4I1.7
AUTHOR(S)
Md. Moynul Islam1, 2*, Md. Mofazzal Hossain1, M. Rostom Ali1, Md. Saiful Islam2
ABSTRACT
Cyclic voltammetry (CV) is a powerful and popular electrochemical technique commonly employed to investigate the reduction and oxidation processes of molecular species. It has been used to investigate the interaction behavior of cadmium from a solution containing cadmium chloride (CdCl2·H2O) in an ethylene glycol (EG)-choline chloride (ChCl) based ionic liquid has been carried out onto a copper cathode by constant current and constant potential methods at room temperature. The influences of various experimental conditions and some parameters on cyclic voltammetry have been investigated using a Potentiostat/Galvanostat. It was observed that deposition occurs in ChCl:2EG:0.1MCdCl2·H2O ionic liquid via an instantaneous nucleation mechanism in the very initial stage of the crystal growth. It is shown that smooth and good adhering bright metallic coloured cadmium has been electrodeposited from this ionic liquid (ethaline) containing CdCl2·H2O at room temperature in presence of 0.10 g·L-1 polyethylene glycol and 40 mL·L-1 formic acid mixture and 0.05 mol·L-1 P2O5 as additives. The cadmium electrodeposit obtained at the applied deposition potentials up to -0.95 V and current densities up to -20.0 A·m-2 are very smooth, good adhering and of uniform size. Cadmium electrodeposits cannot be obtained from urea/glycerol based ionic liquid (reline/glyceline) at any temperature and even on the addition of additives.