A simple strategy for the synthesis of flower-like textures of Au-ZnO anchored carbon nanocomposite towards the high‐performance electrochemical sensing of sunset yellow

A. T. Ezhil Vilian, Sung Min Kang, Seo Yeong Oh, Cheol Woo Oh, Reddicherla Umapathi, Yun Suk Huh, Young Kyu Han

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Consumption of sunset yellow (SY) above a certain concentration through food products may leads to adverse health issues. Therefore, it is imperative to develop technologies for rapid and selective detection of SY. Herein, a flower-like reduced graphene oxide (rGO)-graphitic carbon nitride (g-CN)/ZnO-Au nanoparticle (NPs) has been prepared and utilized for the specific detection of SY. The fabricated rGO-g-CN/ZnO-AuNPs composite was characterized and investigated by XRD, FTIR, SEM, TEM, XPS, EIS, and voltammetry techniques. Characterization techniques elucidated the deposition of ZnO-AuNPs on to the rGO-g-CN and successful fabrication of rGO-g-CN/ZnO-AuNPs composite. rGO-g-CN/ZnO-AuNPs composite possesses excellent catalytic activity for the oxidation of SY. Developed rGO-g-CN/ZnO-AuNPs sensor exhibits LOD of 1.34 nM for SY concentrations ranging from 5 to 85 nM. Noteworthily, the sensor has been successfully employed for the detection and recovery of SY in real-time samples. Fabricated composite opens up new avenues to develop electrochemical sensor for food safety.

Original languageEnglish
Article number126848
JournalFood Chemistry
Volume323
DOIs
StatePublished - 1 Sep 2020

Keywords

  • Electrochemical detection
  • Graphene oxide
  • Metal oxides
  • Square wave voltammetry
  • Sunset yellow

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