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The electrochemical reduction of trinitrotoluene on a platinum wire modified by chemisorbed acetonitrile

Authorized Users Only
2010
Authors
Marinović, Vedrana M.
Marinović, Sanja
Jovanović, M.
Jovanovic, J.
Štrbac, Svetlana
Article (Published version)
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Abstract
The electrochemical reduction of 2,4,6-trinitrotoluene (TNT) was investigated by cyclic voltammetry on a platinum electrode in aqueous sodium chloride solutions with acetonitrile containing different concentrations of TNT. The obtained cyclic voltammograms showed three distinct reduction peaks in the potential range of -0.45 to -0.8 V (vs. an Ag/AgCl (3M KCl) reference electrode), which refer to the multi-step process of TNT reduction. The calibration curves of the dependence of the first peak current on the TNT concentration were linear in the ranges 4.4-638.4 mu M and 0.11-4.40 mu M for two different scan rates, 200 my s(-1) and 20 mV s(-1), respectively. The detection limit was 0.11 mu M. Acetonitrile chemisorption on Pt surface took place and caused thus modified platinum electrode to exhibit an electrochemically stabile behaviour. Hence, a very high reproducibility over a prolonged time and voltammetric cycling was provided for using a Pt wire that is easy to handle as a suitable ...material for TNT sensing. Additionally, it was confirmed by testing the acetonitrile modified Pt wire for TNT detection in river water.

Keywords:
Trinitrotoluene / Electrochemical reduction / Platinum / Acetonitrile
Source:
Journal of Electroanalytical Chemistry, 2010, 648, 1, 1-7
Publisher:
  • Elsevier
Projects:
  • Modifikacija metalnih i nemetalnih materijala elektroprovodnim polimerima za primenu u novim tehnologijama (RS-142044)
  • Mezoporozni i nanomaterijali u katalitičkim i sorpcionim procesima (RS-166001)

DOI: 10.1016/j.jelechem.2010.07.008

ISSN: 1572-6657

WoS: 000282399400001

Scopus: 2-s2.0-77956411619
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/720
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IHTM

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