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以玻碳电极(GCE)为基底电化学聚合制得聚3,4-乙烯二氧噻吩(PEDOT)膜修饰电极,再通过Nafion共固定磷钼酸和石墨烯构建了一种新型的无酶电化学H_2O_2传感器.利用扫描电子显微镜(SEM)表征制得的修饰电极,并通过循环伏安法和计时电流法研究了传感器对H_2O_2的响应性能.结果表明,在优化条件下,该传感器对H_2O_2还原具有良好的电催化性能,检测H_2O_2的线性范围为2.91×10~(-6)~1.83×10~(-2)mol·L~(-1),检出限和灵敏度分别为9.90×10~(-7)mol·L~(-1)(S/N=3)和112.5μA·(mmol·L~(-1))~(-1).此外,该传感器还具有良好的重现性和选择性.
Poly (3,4-ethylenedioxythiophene) (PEDOT) modified electrode was electrochemically polymerized on glassy carbon electrode (GCE) substrate, and then a novel non-enzymatic electricity was prepared by Nafion co-immobilized phosphomolybdic acid and graphene The chemical H 2 O 2 sensor was used to characterize the modified electrode by scanning electron microscopy (SEM). The response of the sensor to H 2 O 2 was studied by cyclic voltammetry and chronoamperometry. The results showed that under the optimal conditions, The results showed that the linear range of H 2 O 2 was 2.91 × 10 -6 ~ 1.83 × 10 -2 mol·L -1 and the detection limit and sensitivity were 9.90 × 10 ~ (-7) mol·L -1 (S / N = 3) and 112.5μA mmol·L -1 (-1) .In addition, the sensor has good reproducibility And selective.