Facile Fabrication of CeO2/Electrochemically Reduced Graphene Oxide Nanocomposites for Vanillin Detection in Commercial Food Products

被引：26
作者：
Nie, Xue [1 ,2 ]
Zhang, Rui [1 ]
Tang, Zheng [1 ]
Wang, Haiyan [1 ]
Deng, Peihong [2 ]
Tang, Yougen [1 ]
机构：
[1] Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China
[2] Hengyang Normal Univ, Key Lab Funct Organometall Mat Hunan Prov Univ, Coll Chem & Mat Sci, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China
来源：
NANOMATERIALS | 2020年 / 10卷 / 07期
关键词：
CeO(2)nanoparticles; vanillin; reduced graphene oxide; nanocomposites; voltammetric determination; SIMULTANEOUS VOLTAMMETRIC DETERMINATION; GLASSY-CARBON ELECTRODE; SENSING PLATFORM; NANOPARTICLES; COMPOSITE; ADSORPTION; TRYPTOPHAN; CAFFEINE; NANORODS; SENSOR;
D O I：
10.3390/nano10071356
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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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页码：1 / 16
页数：16
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