Eco-friendly synthesis of nanoceria using orange peel extract for electrochemical detection of selective cadmium ions

• Published in: Microchemical journal 2024-07, Vol.202, p.110794, Article 110794
• Main Authors: Helen Rani, R., Sharmila Rahale, C., Prasanthrajan, M., Girija, S., Wilson, J., Jeyasundara Sharmila, D., Saranya, N., Maragatham, S.
• Format: Article
• Language: English
• Subjects: Cerium oxide nanoparticle; Characterization; Electrochemical properties; Green synthesis; Orange peel extract
• ISSN: 0026-265X; 1095-9149
• DOI: 10.1016/j.microc.2024.110794

[Display omitted] •Nanoceria was synthesized by using Orange peel extract with the average size of 17 nm.•The green synthesized nanoceria, derived from orange peel extract, exhibited commendable performance in cyclic voltammetry, showcasing high conductivity. Additionally, electrochemical impedance spectroscopy results further supported its electrochemical properties.•Green synthesized CeO2 nanoparticle was demonstrated for selective detection of Cd2+ for the very first time. Contamination of drinking water and food by cadmium ions (Cd2+) is a major threat to human health and environment. Here, we focus on the fabrication of simple, cost effective, eco-friendly synthesis of Cerium oxide nanoparticles (nanoceria) using orange peel extract for selective detection of cadmium (Cd2+) ions. The green synthesized nanoparticles exhibited cubic structure which was confirmed by XRD studies. The FESEM and EDS image confirm the surface morphology and elemental composition of nanoceria. HRTEM possesses the cubic structure with an average particle size of 17 nm. The green synthesized nanoceria shows a strong absorption Raman spectrum at 465 cm−1. Furthermore, the Electrochemical profile of nanoceria was investigated by cyclic voltammetry and electrochemical impedance spectroscopy. The electroactive surface area recorded for CeO2 modified GCE is 13.24 cm2. The nanoceria modified Glassy carbon electrode (GCE) was used for the detection of toxic heavy metal Cd2+ ion with square wave voltammetry. The linear detection range of Cd2+ was from 10 µM to 1000 µM. The fabricated green synthesized CeO2 electrode exhibited a linear behaviour and the detection limit was found to be 0.47 nM exhibited excellent stability. The green synthesized CeO2 can also be used in trace detection of Cd2+ ions in environmental samples. The nanoceria synthesized via orange peel extract has high electrochemical performance would be of great interest for constructing novel sensing platforms for monitoring heavy metal ions (Cd2+) in environment.