A Novel Nonenzymatic Hydrogen Peroxide Sensor Based on a Polypyrrole Nanowire-Copper Nanocomposite Modified Gold Electrode.
A Novel Nonenzymatic Hydrogen Peroxide Sensor Based on a Polypyrrole Nanowire-Copper Nanocomposite Modified Gold Electrode.
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DOI：
10.3390/s8085141
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发表时间：
2008-08-28
期刊：
影响因子：
--
通讯作者：
Ling S
中科院分区：
文献类型：
--
作者：
Zhang T;Yuan R;Chai Y;Li W;Ling S
采用循环伏安法将纳米铜分散在聚吡咯(PPy)纳米线上，在金电极上形成PPy-铜纳米复合材料，制备了一种新型的非酶过氧化氢传感器。用扫描电子显微镜对聚吡咯纳米线和聚吡咯-铜纳米复合材料的形貌进行了表征。用循环伏安法和计时电流法表征了PPy-铜纳米复合材料对H_2O_2的反应性能。为了获得最佳的分析性能，研究了外加电位、检测溶液浓度对传感器响应电流的影响。结果表明，PPy-铜纳米复合材料对过氧化氢(H_2O_2)的还原具有良好的催化活性。该传感器对过氧化氢的线性响应范围为7.0×10-6~4.3×10-3mol L-1，检出限为2.3×10-6mol L-1。实验结果还表明，该传感器具有良好的稳定性。
A novel nonenzymatic hydrogen peroxide (H2O2) sensor has been fabricated by dispersing copper nanoparticles onto polypyrrole (PPy) nanowires by cyclic voltammetry (CV) to form PPy-copper nanocomposites on gold electrodes. Scanning electron microscopy (SEM) was used to characterize the morphologies of the PPy nanowires and the PPy-copper nanocomposite. The reactivity of the PPy-copper nanocomposite towards H2O2 was characterized by cyclic voltammetry and chronoamperometry. Effects of applied potential, the concentrations of detection solution upon the response currents of the sensor were investigated for an optimum analytical performance. It was proved that the PPy-copper nanocomposite showed excellent catalytic activity for the reduction of hydrogen peroxide (H2O2). The sensor showed a linear response to hydrogen peroxide in the concentration range between 7.0×10-6 and 4.3×10-3 mol L-1 with a high sensitivity, and a detection limit of 2.3×10-6 mol L-1. Experiment results also showed that the sensor had good stability.
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影响因子：
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