122nd General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Grand Ballroom
Time 10월 19일 (금요일) 11:00~12:30
Code ELEC.P-464
Subject As(III) Detection at Nanoporous Gold Electrode by Square Wave Voltammetry
Authors Min Ji Seo, Camerun Kastro Kanido, Jongwon Kim*
Department of Chemistry, Chungbuk Natioanl University, Korea
Abstract Nanoporous gold (NPG) has a much larger surface area than the flat gold electrode and is widely used because of its unique physical and chemical properties. In this experiment, when the As (III) detection was performed, it was observed how the electrochemical behavior and sensitivity at NPG electrode were enhanced compared to the flat gold electrode. Furthermore, it was observed how the electrochemical behavior and sensitivity of the As (III) detection changes when the surface area of the NPG electrode is controlled. NPG electrode was prepared by anodization of Au rod surfaces. The surface areas of NPG electrodes were controlled by adjusting the anodizing reaction time. Arsenic (III) detection was carried out by using a square wave voltammetry (SWV) technique at an NPG electrode, and the electrochemical behavior was observed by varying the deposition time and deposition potential to find the optimum condition. Under the optimized experimental conditions, observation of the electrochemical behavior of the Arsenic (III) peak at the NPG electrode showed that the peak was negatively shifted and had greater sensitivity than the flat gold electrode. NPG electrode shows excellent selectivity and anti-interference characteristics against Cu (II) ions. This suggest that the NPG electrode with a large surface area and high sensitivity could be used as a very useful electrode sensor for the detection of Arsenic (III) by square wave voltammetry (SWV).
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