Microwave-radiated synthesis of gold nanoparticles/carbon nanotubes composites and its application to voltammetric detection of trace mercury(II)

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Abstract

Gold nanoparticles/carbon nanotubes (Au-NPs/CNTs) composites were rapidly synthesized by microwave radiation, and firstly applied for the determination of trace mercury(II) by anodic stripping voltammetry (ASV). The structure and composition of the synthesized Au-NPs/CNTs nanocomposites were characterized by transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), UV-vis absorption spectroscopy and cyclic voltammetry. Au-NPs/CNTs nanocomposites modified glassy carbon electrode (Au-NPs/CNTs/GCE) exhibited excellent performance for Hg(II) analysis. A wide linear range (5 × 10-10-1.25 × 10-6 mol/L) and good repeatability (relative standard deviation of 1.84%) were obtained for Hg(II) detection. The limit of detection was found to be 3 × 10-10 mol/L (0.06 μg/L) at 2 min accumulation, while the World Health Organization's guideline value of mercury for drinking water is 1 μg/L, suggesting the proposed method may have practical utility.

Original languageEnglish
Pages (from-to)1839-1843
Number of pages5
JournalElectrochemistry Communications
Volume10
Issue number12
DOIs
StatePublished - Dec 2008

Keywords

  • Carbon nanotubes
  • Gold nanoparticles
  • Mercury
  • Microwave-irradiated synthesis
  • Voltammetry

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