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利用吸附在玻碳基底Nafion膜的负电性磺酸基与正电荷硫堇(Thi)相互作用,将电子媒介体固定电极表面,通过铂纳米线(Pt NW)与硫堇间的键合作用及铂纳米线强吸附效应把葡萄糖氧化酶(GOD)固定于玻碳基底上,制得高灵敏电流型葡萄糖生物传感电极.通过循环伏安法考察了电极的电化学特性,研究了该铂纳米线生物传感电极的葡萄糖电催化性能.结果表明,该传感电极对葡萄糖有良好的电催化活性,线性响应范围1.0×10-5~6.0×10-3mol·L-1,检测限3.0×10-6mol·L-1.该传感电极制备简单、灵敏度高、重现性好.
An electron mediator is immobilized on the surface of the electrode by the interaction between the negatively charged sulfonic acid group adsorbed on the glassy carbon base Nafion membrane and the positively charged thionine (Thi), and the surface of the electrode is fixed by bonding between the platinum nanowire (Pt NW) and thionine and The strong adsorption of platinum nanowires immobilized glucose oxidase (GOD) on a glassy carbon substrate to prepare a highly sensitive current glucose biosensor. The electrochemical properties of the electrode were investigated by cyclic voltammetry. The results showed that the sensor electrode has good electrocatalytic activity for glucose with a linear response range of 1.0 × 10-5 ~ 6.0 × 10-3mol·L-1 and a detection limit of 3.0 × 10-6mol · L-1. The sensing electrode is simple to prepare, high sensitivity and good reproducibility.