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| Type |
Poster Presentation |
| Area |
Electrochemistry |
| Room No. |
Grand Ballroom |
| Time |
10월 19일 (금요일) 11:00~12:30 |
| Code |
ELEC.P-505 |
| Subject |
Preparation of hexagonal sodium tungsten oxide nanoflowers: Their various application for detecting H2O2 as enzyme-like mimics and electrocatalysts
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| Authors |
Seung Hoon Back, Tae Jung Park*, Kim Minwoo
Department of Chemistry, Chung-Ang University, Korea
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| Abstract |
Sodium tungsten oxide nanoflower (WONFs) is prepared through a simple hydrothermal reaction at low temperature. Tungsten oxide has been widely studied due to its electro-chromic and -catalytic properties such as peroxidase-like activity, which decomposes hydrogen peroxide to H2O molecule and electron. Because the catalytic activities occur on the interfacial, the surface area and morphology of catalyst are closely related to their activity. Among the several structures, nanoflower shape has known that it has larger surface area per unit volume then sphere or rod shape. The main object of this research is to synthesize the products and monitor their electrochemical detection activity. The sample was characterized by XRD, TGA, DSC, SEM, TEM, EDX, FTIR, XPS, BET and electrochemical analysis such as CV and chronoamperometry. Peroxidase-like activity of WONFs were investigated to two ways, first is colorimetric methods, with detection limit of 138 μM, and second is electrochemical analysis with detection limit of 56 nM. In colorimetric detection, 3,3’5,5’-tetra-methylbenzidine (TMB) was used and in electrochemical detection, modified glassy carbon electrode (GCE) was used. Based on the above results, it was revealed that the products have flower-like shaped Na0.17W3.085∙0.17H2O and peroxidase-like activity. In addition, it can be applicable to H2O2 detect biosensor platform due to their electrochemical property and high selectivity. |
| E-mail |
cutey1221@naver.com |
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122nd General Meeting of the KCS