| PW12-MWCNT-PPY/GC修饰电极的制备及电化学性质研究 |
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| 引用本文： | 张晓文,黄永葵,杨水金,张海丽.PW12-MWCNT-PPY/GC修饰电极的制备及电化学性质研究[J].湖北师范学院学报(自然科学版),2011,31(4):76-80. |
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| 作者姓名： | 张晓文 黄永葵 杨水金 张海丽 |
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| 作者单位： | 湖北师范学院化学与环境工程学院 |
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| 基金项目： | 国家自然科学基金，湖北省省教育厅重点项目 |
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| 摘 要： | 采用电聚合方法在玻碳电极上制备了Keggin型磷钨酸-多壁碳纳米管-聚吡咯(PW12-MWCNT-PPy)复合物膜修饰电极,并探讨了该电极对NO2-的电催化还原和电化学行为。实验结果表明,该电极对NO2-响应速度快,检测灵敏度高。NO2-在2.1μmol.L-1～1.3 mmol.L-1浓度范围内,与修饰电极上的稳态安培响应电流呈线性关系,检测限为0.62μmol.L-1(S/N=3).该修饰电极用于腌菜中亚硝酸根离子的测定,回收率在95%～99%之间。
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| 关 键 词： | 聚吡咯 碳纳米管 磷钨杂多酸 电催化 修饰电极 亚硝酸盐 |
Preparation of a polyoxometalate PW12 and MWCNT doped polypyrrole modified electrode and its catalytic properties |
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| ZHANG Xiao-wen,HUANG Yong-kui,YANG Shui-jin,ZHANG Hai-li.Preparation of a polyoxometalate PW12 and MWCNT doped polypyrrole modified electrode and its catalytic properties[J].Journal of Hubei Normal University(Natural Science),2011,31(4):76-80. |
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| Authors: | ZHANG Xiao-wen HUANG Yong-kui YANG Shui-jin ZHANG Hai-li |
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| Institution: | (College of Chemistry and Environmental Engineering, Hubei Normal University,Huangshi 435002,China) |
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| Abstract: | A polyoxometalate （PW12） and MWCNT doped polypyrrole （PPy） modified electrode was prepared by electrochemical polymerization in aqueous 0.5 mol . L-1 H2SO4 solution. During the polymerization of PPy, PW12 acted as both catalyst and dopant, CNTs suggested that they had the abihty to promote electron transfer reaction. The electrochemical behavior of nitrite （ NO2 - ） at the PW12 - MWCNT - PPy modified electrode was investigated including pH effect, scan rate and so on. It showed a catalytic effect toward nitrite. The linear range of determination of NO2 - on this electrode was 2.1 μmol .L -1 to 1. 3 mmol .L-1, with a detection limit of 0.62 μmol . L-1. The developed method has been applied to the determination of NO2 - in pickled foods samples. |
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| Keywords: | polypyrrole carbonnanotubes polyoxometalate electrocatalysis modified electrode nitrite |
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