Fabrication of a sensitive electrochemical sensor of 2,4-dichlorophenoxyacetic acid herbicide based on synergistic catalysis of silver/manganese oxide nanoparticles and polyalizarin at low potential

Serveh Fathi, Reza Rezaee*, Afshin Maleki, Nader Amini, Mahdi Safari, Seung Mok Lee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

A new electrochemical method for determining 2,4-dichlorophenoxyacetic acid (2,4-D) in aqueous solutions was proposed. A glassy carbon electrode was modified with silver, manganese oxide nanoparticles, and alizarin yellow R polymer (Ag-MnOxNPs/PAYR). Scanning electron microscopy, energy dispersive X-ray spectroscopy and electrochemical impedance spectroscopy were used in order to characterize the modified electrode. The electrochemical attributes of 2,4-D at pH 1–13 were studied with the proposed electrode. In order to investigate the electrocatalytical oxidation attributes of this sensor, cyclic voltammetry and differential pulse voltammetry (DPV) were used. The linear range (22–11,752 μM) and detection of limit (7.33 μM) were appraised for oxidation peak at 0.8V by cyclic voltammetry method. In addition, the linear range (6–14,308 μM) and detection of limit (2 μM) were obtained by DPV technique. Results illustrated that the modified electrode has low detection limit, high linear range, and good repeatability at pH 6. Furthermore, this electrode was used for the analysis of 2,4-D in water samples.

Original languageEnglish
Pages (from-to)283-290
Number of pages8
JournalDesalination and Water Treatment
Volume229
DOIs
Publication statusPublished - Jul 2021
Externally publishedYes

Keywords

  • 2
  • 4-dichlorophenoxyacetic acid herbicide
  • Alizarin yellow R
  • Manganese oxide nanoparticles
  • Sensor
  • Silver nanoparticles

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