Electrocatalytic detection of noxious antioxidant diphenylamine in fruit samples with support of Cu@nanoporous carbon modified sensor

Mani Sivakumar, Balamurugan Muthukutty, Tse Wei Chen, Shen Ming Chen, Alangadu Kothandan Vivekanandan, Shih Hsun Chen, Mohammad Rafe Hatshan, M. Ajmal Ali, Mohanraj Kumar

Research output: Contribution to journalJournal articlepeer-review

Abstract

Herein, the facile synthesis of copper(II) and benzene-1,3,5-tricarboxylate (Cu-BTC) and copper nanoporous carbon (Cu@NPC) for the electrochemical detection of diphenylamine (DPA) was systematically investigated. The Cu-BTC and Cu@NPC materials structural, morphological, and thermal stability were evaluated and confirmed using FE-SEM, HR-TEM, XRD, FT-IR, and TGA. The electrocatalytic behavior of sensor materials was examined by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). It is presumed that the structural stability and synergic effect exhibited in Cu@NPC are favorable for enhanced sensitivity and selectivity towards the detection of DPA. The Cu@NPC exhibited a wide linear range (0.09–396.82 μM) and the lowest limit of detection (5 nM). Furthermore, the real sample analysis of the sensor for the detection of DPA in apples and pears confirms its potential capability in practical application.

Original languageEnglish
Article number133400
JournalChemosphere
Volume292
DOIs
StatePublished - Apr 2022
Externally publishedYes

Keywords

  • Diphenylamine
  • Electrochemical sensor
  • MOF
  • Nanoporous carbon
  • Real sample analysis

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