Detection and electrocatalytic mechanism of zearalenone using nanohybrid sensor based on copper-based metal-organic framework/magnetic Fe3O4-graphene oxide modified electrode

Yifang Zeng; María Belén Camarada; Xinyu Lu; Kaijie Tang; Weiqiang Li; Daoyang Qiu; Yangping Wen; Guoping Wu; Qiushui Luo; Ling Bai

doi:10.1016/j.foodchem.2021.131024

Detection and electrocatalytic mechanism of zearalenone using nanohybrid sensor based on copper-based metal-organic framework/magnetic Fe₃O₄-graphene oxide modified electrode

Food Chem. 2022 Feb 15:370:131024. doi: 10.1016/j.foodchem.2021.131024. Epub 2021 Sep 2.

Authors

Yifang Zeng¹, María Belén Camarada², Xinyu Lu³, Kaijie Tang⁴, Weiqiang Li¹, Daoyang Qiu¹, Yangping Wen⁵, Guoping Wu⁶, Qiushui Luo⁶, Ling Bai³

Affiliations

¹ College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, People's Republic of China; Institute of Functional Materials and Agricultural Applied Chemistry, Jiangxi Agricultural University, Nanchang 330045, People's Republic of China.
² Departamento de Química Inorgánica, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile; Centro Investigación en Nanotecnología y Materiales Avanzados, CIEN-UC, Pontificia Universidad Católica de Chile, Santiago, Chile.
³ Institute of Functional Materials and Agricultural Applied Chemistry, Jiangxi Agricultural University, Nanchang 330045, People's Republic of China.
⁴ College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, People's Republic of China. Electronic address: tkjie999@sina.com.
⁵ Institute of Functional Materials and Agricultural Applied Chemistry, Jiangxi Agricultural University, Nanchang 330045, People's Republic of China. Electronic address: wenyangping1980@jxau.edu.cn.
⁶ College of Food Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, People's Republic of China.

PMID: 34525426
DOI: 10.1016/j.foodchem.2021.131024

Abstract

A novel and simple strategy was proposed for the determination of ZEA in breakfast cereal, maize powder and rice flour using an electrochemical nanohybrid sensor based on copper-based metal-organic framework (Cu-MOF)/magnetic Fe₃O₄-graphene oxide (Fe₃O₄-GO) modified electrode fabricated by the layer-by-layer assembled technique. The synthesized Cu-MOF with high porosity favorably improved the effective surface area and the analytical performance of nanohybrid sensing electrode. The crafted sensor has large surface area, high electron transfer, and satisfactory efficiency. ZEA was electrochemically detected in a wide linear range from 159.2 to 2865.2 ng mL^-1 with LOD of 23.14 ng mL^-1 under the optimal conditions. Moreover, the electrocatalytic mechanism of ZEA oxidation was proposed by density functional theory (DFT). A favorable energetic interaction was presented when Cu-MOF adsorbed on Fe₃O₄-GO, and a small new band appeared on the Fermi level energy (E_f) that facilitated the electron transfer between bands.

Keywords: Electrocatalytic mechanism; Electrochemical sensor; Functionalized graphene; Metal-organic frameworks; Zearalenone.

MeSH terms

Copper
Electrochemical Techniques
Electrodes
Graphite
Magnetic Phenomena
Metal-Organic Frameworks*
Zearalenone*

Substances

Metal-Organic Frameworks
graphene oxide
Zearalenone
Graphite
Copper