Electrochemical detection of o-nitrophenol on a poly(propyleneimine)-gold nanocomposite modified glassy carbon electrode

Thabile Ndlovu, Omotayo A. Arotiba, Rui W. Krause, Bhekie B. Mamba

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)

Abstract

The electrochemical determination of o-nitrophenol by square wave voltammetry using a nanocomposite of generation 2 poly(propyleneimine) dendrimer and gold nanoparticles modified glassy carbon electrode is reported. A characteristic reduction peak at ca -650 mV for o-nitrophenol was observed with enhanced current. The nanocomposite electrode was used as a sensor for the detection of this model organic pollutant with very good reproducibility and stability. The reduction peak current was directly proportional to the o-nitrophenol concentration in the range between 6.1 × 10-7 mol L-1 to 6.25 × 10-4 mol L-1. A detection limit of 4.5 × 10-7 mol L-1 was calculated.

Original languageEnglish
Pages (from-to)1179-1186
Number of pages8
JournalInternational Journal of Electrochemical Science
Volume5
Issue number8
Publication statusPublished - Aug 2010

Keywords

  • Gold nanoparticle
  • Nanocomposite
  • Poly(propyleneimine) dendrimer
  • Sensor
  • Square wave voltammetry
  • o-nitrophenol

ASJC Scopus subject areas

  • Electrochemistry

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