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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/043/0245

    • Keywords

       

      Graphene oxide; cobalt hexacyanoferrate; hydrazine oxidation; cyclic voltammetry; amperometry; electrocatalysis.

    • Abstract

       

      In-situ electrochemical deposition of cobalt hexacyanoferrate (CoHCF) on graphene oxide (GO) and its application for the electrocatalytic hydrazine determination in real samples are described in this research study. Co$^{2+}$ is immobilized on GO and the resulting material, GO-Co$^{2+}$ is coated on the surface of glassy carbon (GC) electrode. The fabricated electrode (GC/GO-Co$^{2+}$) is subjected to a continuous potential cycling in the range of 0.0–1.0 V which results in the formation of a thin CoHCF film on the surface of GO coated on the GC electrode (abbreviated as GC/GO-CoHCF). The synthesized GO-CoHCF composite material is characterized by Fourier transform infrared and scanning electron microscopy. GC/GO-CoHCF electrode electrocatalytically oxidizes hydrazine at low overpotential (0.63 V) and thisphenomenon is subsequently utilized for the sensitive determination of hydrazine in aqueous solutions. It exhibits a wide linear calibration range (0.1–400 $\mu$M), high sensitivity (0.93 $\mu$A $\mu$M$^{-1}$ cm$^{-2}$) and low limit of detection (17.5 nM) for the determination of hydrazine. Further, this electrode is employed for hydrazine determination in real samples.

    • Author Affiliations

       

      MAMTA YADAV1 VELLAICHAMY GANESAN1 RUPALI GUPTA1 DHARMENDRA KUMAR YADAV1 PIYUSH KUMAR SONKAR

      1. Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India

    • Dates

       
      Published
      28 August 2020
      Manuscript received
      19 November 2019
      Accepted
      22 February 2020
      Final version published online
      28 August 2020

    • Supplementary Material

       

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

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      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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