Journal
ANALYTICA CHIMICA ACTA
Volume 1088, Issue -, Pages 45-53Publisher
ELSEVIER
DOI: 10.1016/j.aca.2019.08.024
Keywords
Electrochemical sensor; Graphene nanoplatelets; Controllable morphologies; CeO2; Phenolic pollutants
Categories
Funding
- National Natural Science Foundation of China [61701352]
- Graduate Innovative Fund of Wuhan Institute of Technology of China [CX2018153, CX2018160]
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To explore suitable sensing materials for sensitive and selective detection of phenolic pollutants, CeO2 nanocubes, nanopolyhedras, and nanorods were synthesized by a hydrothermal method. These CeO2 nanomaterials were further loaded on the support of graphene nanoplatelets. As-synthesized nanomaterials and nanocomposites were characterized using transmission electron microscopy, X-ray diffraction and Raman spectroscopy as well as electrochemical techniques including cyclic voltammetry, electrochemical impedance spectroscopy, and differential pulse voltammetry. The nanocomposite of graphene nanoplatelets with CeO2 nanorods shows the highest electrochemical activity towards soluble species. Highly sensitive and selective determination of tetrabromobisphenol A, catechol, diethylstilbestrol, and nonylphenol was thus achieved at this nanocomposite based electrode. Their limits of detection were as low as 1.8, 42, 1.5 and 2.7 nM, respectively. Such an electrochemical sensor is thus promising for simple, fast and sensitive electrochemical determining of trace-leveled phenolic pollutants in water samples. (C) 2019 Elsevier B.V. All rights reserved.
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