Simultaneous Determination of Cd(II) and Pb(II) at a glassy carbon electrode immobilized with ceria nanoparticles by Anodic Stripping Voltammetry

Abstract

Unique and fascinating features ofcerium oxide nanoparticles are gained significant research interest in recent years as theycan lead to crucial technological advancements in fabrication of sensing devices. In the present paper, crystalline cerium oxide nanoparticles have been successfully prepared using a facile one step nitrate-sucrose decomposition method.The prepared cerium oxide nanoparticles were drop casted on the glassy carbon electrode (GCE) and then it was investigated for the trace analysis of toxic cadmium and lead present in water samples.The cerium oxide modified GCE was characterized using electrochemical impedance and cyclic voltammetry. The differential pulse anodic stripping voltammetry (DPASV) results showed that the detection limits for cadmium and lead was found to be3.1 and 3.5 µg/L respectively under optimized conditions.The observed high sensitivity and selectivity is due to high surface to volume ratio of cerium oxide nanoparticles.