CeO2 nanoparticle-modified electrode as a novel electrochemical interface in the quantification of Zn2+ ions at trace level: application to real sample analysis

Abstract

A simple strategy has been proposed to quantify Zn2+ ions using CeO2 nanoparticle-modified glassy carbon electrode. The CeO2 nanoparticles were prepared by sucrose-nitrate decomposition method, and it was characterized by X-ray diffraction (XRD), FT-IR, TEM, and surface area analyzer. The synthesized CeO2 nanoparticles were used as modifier molecules as a thin film on glassy carbon electrode (GCE) in the trace level quantification of Zn2+ by using cyclic voltammetry (CV) and differential pulse anodic stripping voltammetry (DPASV) techniques. The fabricated sensor exhibited a good analytical response towards Zn2+ ions. The modified electrode showed a wide linearity in the concentration range 20–380 μg L−1 with a limit of detection 0.36 μg L−1. The proposed electrochemical sensor was successfully applied to trace level Zn2+ quantification from real sample matrices.