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 language | English |
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Pages (from-to) | 1179-1186 |
Number of pages | 8 |
Journal | International Journal of Electrochemical Science |
Volume | 5 |
Issue number | 8 |
Publication status | Published - Aug 2010 |
Keywords
- Gold nanoparticle
- Nanocomposite
- Poly(propyleneimine) dendrimer
- Sensor
- Square wave voltammetry
- o-nitrophenol
ASJC Scopus subject areas
- Electrochemistry