• 文献标题:   Detection and electrocatalytic mechanism of zearalenone using nanohybrid sensor based on copper-based metal-organic framework/magnetic Fe3O4-graphene oxide modified electrode
  • 文献类型:   Article
  • 作  者:   ZENG YF, CAMARADA MB, LU XY, TANG KJ, LI WQ, QIU DY, WEN YP, WU GP, LUO QS, BAI L
  • 作者关键词:   zearalenone, electrochemical sensor, electrocatalytic mechanism, metalorganic framework, functionalized graphene
  • 出版物名称:   FOOD CHEMISTRY
  • ISSN:   0308-8146 EI 1873-7072
  • 通讯作者地址:  
  • 被引频次:   14
  • DOI:   10.1016/j.foodchem.2021.131024 EA SEP 2021
  • 出版年:   2022

▎ 摘  要

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 electro-catalytic 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.