Synthesis of Nanocrystalline Bismuth and Its Application to the Detection of Trace Metals

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Abstract:

Surface modified carbon strip electrode with Bi nanopowder was suggested for a simultaneous analysis of Zn, Cd, and Pb ions by a square wave anodic stripping voltammetry, and the influence of the modifying Bi mass and particle size on the trace metal response was investigated. The Bi nanopowders with various particle size distributions were synthesized by an optimization of the gas condensation condition, in which a refractory crucible was applied for the evaporation of volatile Bi, and then immobilized on the surface of a working electrode. The result of the stripping measurements shows that when the modifying mass and the particle size of the Bi powder were in the range of 2 to 5 μg/cm2 and less than 300 nm, respectively, a well-developed and reproducible stripping response was obtained. The proposed "mercury-free" carbon strip electrode, modified with Bi nanopowder, is conveniently usable and directly applicable to a trace metal analysis without a pre-deposition of Bi and complicated surface polishing steps.

Keywords: ANODIC STRIPPING VOLTAMMETRY; BISMUTH-NANOPOWDER; CADMIUM; GAS CONDENSATION; LEAD; MODIFIED CARBON ELECTRODE; ZINC

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.1502

Publication date: January 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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