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| Type |
Poster Presentation |
| Area |
Electrochemistry |
| Room No. |
Grand Ballroom |
| Time |
10월 19일 (금요일) 11:00~12:30 |
| Code |
ELEC.P-463 |
| Subject |
Comparative Study of the effects of Au nanostructures on the electrochemical detection of Arsenic
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| Authors |
Camerun Kastro Kanido
Department of Chemistry, Chungbuk Natioanl University, Korea |
| Abstract |
Arsenic is a highly toxic chemical element naturally exists in the form of inorganic and an organic compound which is incorporated in the groundwater and soil. Nanostructure modified gold electrodes play a significant role in sensing inorganic arsenic. In this work, we present the effect of various nanostructures: nanoplate gold, dendritic gold and nanospike gold electrodes in detecting low level of arsenic by using Square Wave Anodic Stripping Voltammetry (SWASV) and the relationships of crystallographic orientations with the performance of the modified electrodes under different experimental parameters: deposition charge, deposition potential and deposition time. The sensitivities of each electrode compared to each other and also further comparison made with flat macro-gold electrodes responses. Investigated that nanoplate gold electrodes show higher performance than dendritic Au, nanospike Au as well as flat gold electrodes. The sensitivities were dependent on the surface crystal orientations which is achieved with the maximum Au(111) facets in nanoplate gold electrodes as confirmed by the Pb UPD voltammetric profile of 0.1M NaOH + 10-3 M Pb(NO3)2. The higher sensitivity of 127.1 µA µM-1 cm-2 obtained in nanoplate Au electrode at a deposition time of 300s. The interference test conducted in the presence of Cu(II) indicate that nanostructured modified gold electrode detect arsenic(III) successfully in the presence of copper interference.
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| E-mail |
camerunck@gmail.com |
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122nd General Meeting of the KCS