Nanostructured nitrogen doped diamond for the detection of toxic metal ions

Sujit Deshmukh, Kamatchi Jothiramalingam Sankaran, Svetlana Karneychuk, Johan Verbeeck, James McLaughlin, Ken Haenen, Susanta S Roy

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6 Citations (Scopus)
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Abstract

This work demonstrates the applicability of one-dimensional nitrogen-doped diamond nanorods (N-DNRs) for the simultaneous electrochemical (EC) detection of Pb2+ and Cd2+ ions in an electrolyte solution. Well separated voltammetric peaks are observed for Pb2+ and Cd2+ ions using N-DNRs as a working electrode in square wave anodic stripping voltammetry measurements. Moreover, the cyclic voltammetry response of N-DNR electrodes towards the Fe(CN)6/4-/Fe(CN)6/3- redox reaction is better as compared to undoped DNR electrodes. This enhancement of EC performance in N-DNR electrodes is accounted by the increased amount of sp2 bonded nanographitic phases, enhancing the electrical conductivity at the grain boundary (GB) regions. These findings are supported by transmission electron microscopy and electron energy loss spectroscopy studies. Consequently, the GB defect induced N-DNRs exhibit better adsorption of metal ions, which makes such samples promising candidates for next generation EC sensing devices
Original languageEnglish
Pages (from-to)1871-1878
Number of pages8
JournalElectrochimica Acta
Volume283
Early online date17 Jul 2018
DOIs
Publication statusPublished - 1 Sep 2018

Keywords

  • Nitrogen-doped diamond nanorod
  • Cyclic voltammetry
  • Square wave anodic stripping voltammetry
  • Nanographitic phase
  • Electron energy loss spectroscopy

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    Deshmukh, S., Sankaran, K. J., Karneychuk, S., Verbeeck, J., McLaughlin, J., Haenen, K., & Roy, S. S. (2018). Nanostructured nitrogen doped diamond for the detection of toxic metal ions. Electrochimica Acta, 283, 1871-1878. https://doi.org/10.1016/j.electacta.2018.07.067