纸质出版日期:2019,
网络出版日期:2019-1-25
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氧化还原介质甲苯胺蓝(TBO)自组装到N, P, S共掺杂多孔碳(N, P, S@PC)表面,制备了一种新的电化学复合物(N, P, S@PCTBO)。N, P, S@PC和N, P, S@PC-TBO复合物通过扫描电镜进行表征,两者表面形貌有明显的不同。N, P, S@PC-TBO复合物用来修饰玻碳(GC)电极,具有很高的导电性能。通过循环伏安和安培实验表征N, P, S@PC-TBO/GC电极的电催化行为。实验结果表明,N, P, S@PC-TBO/GC电极具有N, P, S@PC和TBO两者电催化氧化NADH的协同效应。N, P, S@PC-TBO/GC电极检测NADH的线性范围为1×10-6- 2×10-3mol/L,检测限为3×10-7mol/L(信/噪 = 3),响应时间为2 s。因此,制备的N, P, S@PC-TBO/GC电极为NADH的检测提供了较好平台。
A new electrochemical composite is reported, which is based on redox mediator toluidine blue O (TBO) self-assembled onto the surface of nitrogen, phosphorus and sulfur codoped porous carbons (N, P, S@PC). The N, P, S@PC and N, P, S@PC-TBO composites were characterized by scanning electron microscopy and the results showed surface morphology of the two composites was distinctly different. The N, P, S@PC-TBO composite was used to modify glass carbon (GC) electrode which displayed high conductivity. The electrocatalytic behaviour of N, P, S@PC-TBO/GC electrode was studied by voltammetry and amperometry. The results demonstrated that the N, P, S@PC-TBO/GC electrode provided a positively synergistic effect between N, P, S@PC and TBO on the electrocatalytic oxidation of NADH. This modified electrode exhibited a wide linear range from 1×10-6- 2×10-3mol/L and a detection limit of 3×10-7mol/L (S/N= 3) with a fast response time of 2 s, at a low applied potential of-0203 V. Therefore, the N, P, S@PC-TBO/GC electrode provides a new platform for the detection of NADH.
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