Journal
NANOMATERIALS
Volume 10, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/nano10071356
Keywords
CeO(2)nanoparticles; vanillin; reduced graphene oxide; nanocomposites; voltammetric determination
Categories
Funding
- National Nature Science Foundation of China [21571189, 21671200, U19A2019, 21975289]
- Opening Projects of Key Laboratory of Functional Organometallic Materials, University of Hunan Province [GN20K04, GN19K05]
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In this paper, CeO(2)nanoparticles were synthesized by the solvothermal method and dispersed uniformly in graphene oxide (GO) aqueous solution by ultrasonication. The homogeneous CeO2-GO dispersion was coated on the surface of a glassy carbon electrode (GCE), and the CeO2/electrochemically reduced graphene oxide modified electrode (CeO2/ERGO/GCE) was obtained by potentiostatic reduction. The results of X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) showed that CeO(2)nanocrystals were uniformly coated by gossamer like ERGO nanosheets. The electrochemical behavior of vanillin on the CeO2/ERGO/GCE was studied by cyclic voltammetry (CV). It was found that the CeO2/ERGO/GCE has high electrocatalytic activity and good electrochemical performance for vanillin oxidation. Using the second derivative linear sweep voltammetry (SDLSV), the CeO2/ERGO/GCE provides a wide range of 0.04-20 mu M and 20 mu M-100 mu M for vanillin detection, and the detection limit is estimated to be 0.01 mu M after 120 s accumulation. This method has been successfully applied to the vanillin detection in some commercial foods.
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