Microplastic contaminants detection in aquatic environment by hydrophobic cerium oxide nanoparticles

• Published in: Chemosphere (Oxford) 2024-06, Vol.357, p.141961-141961, Article 141961
• Main Authors: Nguyen, Hong-Hue Thi, Kim, Eunbi, Imran, Mohammad, Choi, Yong-Ho, Kwak, Dong-Heui, Ameen, Sadia
• Format: Article
• Language: English
• Subjects: Cerium oxide; Detection; Electrode; Microplastics; Sensitivity
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2024.141961

Microplastics (MPs) poses a significant threat to ecosystems and human health, demanding immediate attention. The reported research work offers an effective and low cost method towards the detection of toxic MPs. In this study, hydrophobic cerium oxide nanoparticles (CeO2 NPs) are synthesized and applied as promising electrode material for the detection of two different types of MPs, i.e. polyethylene (PE) and polypropylene (PP). Through electrochemical analyses, such as cyclic voltammetry (CV) and linear sweep voltammetry (LSV), hydrophobic CeO2 NPs modified glassy carbon electrode (GCE) based sensor demonstrated remarkable sensitivity of ∼0.0343 AmLmg−1cm−2 and detection limit of ∼0.226 mgmL−1, with promising correlation coefficient (R2) towards the detection of PE (∼27–32 μm). Furthermore, hydrophobic CeO2 NPs modified GCE exhibited promising stability and reproducibility towards PE (∼27–32 μm), suggesting the promising potential of hydrophobic CeO2 NPs as electrode materials for an electrochemical microplastics detection. [Display omitted] •Hydrophobic cerium oxide nanoparticles (CeO2 NPs) are synthesized by single step reaction at room atmosphere.•CeO2 NPs are utilized as working electrode for the detection of microplastics in aquatic environment.•Cyclicvoltammetry and linear sweep measurements were used to evaluate the sensing towards the microplastics.•A high sensitivity of ∼0.0343 AmLmg−1cm−2 and detection limit of ∼0.226 mgmL−1 are obtained by CeO2 NPs modified GCE.