Simple Synthesis of CeO2 Nanoparticle Composites In Situ Grown on Carbon Nanotubes for Phenol Detection

Chao Hu; Haiping Huang; Yu Yan; Yongmei Hu; Sui-Jun Liu; He-Rui Wen

doi:10.3389/fchem.2022.907777

Simple Synthesis of CeO₂ Nanoparticle Composites In Situ Grown on Carbon Nanotubes for Phenol Detection

Front Chem. 2022 May 17:10:907777. doi: 10.3389/fchem.2022.907777. eCollection 2022.

Authors

Chao Hu¹, Haiping Huang^{1

2}, Yu Yan¹, Yongmei Hu², Sui-Jun Liu¹, He-Rui Wen¹

Affiliations

¹ Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, China.
² Key Laboratory of Testing and Tracing of Rare Earth Products for State Market Regulation, Jiangxi University of Science and Technology, Ganzhou, China.

Abstract

via simple hydrothermal method, CeO₂ was in-situ grown onto the CNTs to form CeO₂/CNTs nanocomposites were synthesized with cerium nitrate as Ce resource. The morphology and structure were characterized by transmission electron microscopy and X-ray diffraction. The characterizations reveal that CeO₂ nanoparticles are uniformly dispersed onto the surface of the pre-acidified CNTs. The electrochemical property of the synthesized nanocomposite was investigated in 0.1 M KCl electrolyte containing 2 mM [Fe(CN)₆]^3-/4-. The nanocomposites were employed to fabricate electrochemical sensor for phenol detection. The linear range for phenol detection measured by the differential pulse voltammetry method is 1-500 μM. The sensor also exhibits good selectivity, reproducibility and stability. When applied for the river and tap water analysis, it shows good recovery rate.

Keywords: carbon nanotube; cerium dioxide; electrochemical sensor; nanocomposites; phenol.