A Study on Optimization of Nano-sized Bismuth Binding Technology Using a Nafion Solution

作者：Lee Gyoung Ja^*; Kim Chang Kyu; Lee Min Ku; Rhee Chang Kyu

来源：Journal of the Korean Physical Society, 2010, 57(6): 1667-1671.

DOI：10.3938/jkps.57.1667

• Bi nanopowder
• Binding technology
• Nafion
• Heavy metal
• Anodic stripping voltammetry

In this work, nano-sized bismuth (Bi) binding technology has been developed in order to improve the electrochemical characteristics of Bi for detecting heavy metals. A Bi nanopowder synthesized by gas condensation (GC) method exhibits a size smaller than 100 nm. The Bi nanoparticles are uniformly distributed on a carbon surface with strong chemical bonding by using a Nafion solution. The optimum additional amount of Nafion is suggested for dispersion stability and phase stability of the Bi nanoparticles. The detection sensitivity and the detection limit of the nano-Bi fixed electrode are quantitatively estimated from analyses of square wave anodic stripping voltammograms (SWASV). The proposed "mercury-free" carbon strip electrode, modified with a Bi nanopowder, is conveniently to use and is directly applicable to trace metal analysis with neither pre-deposition of Bi nor complicated surface polishing steps.

• 出版日期2010-12