脉冲恒电位一步法制备聚3,4-乙烯二氧噻吩石墨烯复合材料构建无酶葡萄糖传感器

本研究利用石墨烯(rGO)与3,4-乙烯二氧噻吩(EDOT)单体芳香环之间的π-π*相互作用和氢键作用,采用脉冲恒电位一步法制备了聚3,4-乙烯二氧噻吩石墨烯(PEDOT-rGO)复合膜,将纳米镍(NiNPs)电沉积在此复合膜(PEDOT-rGO)表面,制备了NiNPs/PEDOT-rGO修饰玻碳电极(NiNPs/PEDOT-rGO/GCE),研究了此修饰电极对葡萄糖的电催化氧化性能.实验结果表明,此NiNPs/PEDOT-rGO/GCE可以作为无酶传感器实现对葡萄糖的检测.本方法稳定性高,选择性好,线性范围宽(2μmol/L~58 mmol/L),检出限低至0.7μmol/L,可以用于对葡萄糖的快速、灵敏检测.

Construction of Nonenzymatic Glucose Sensor Based on One Step Preparation of Poly(3,4-ethylenedioxythiophene) Graphene Composite Materials by Pulse Potentiostatic Method

The Poly(3,4-ethylenedioxythiophene) graphene ( PEDOT-rGO) composite film was prepared by one step pulse potentiostatic method, based on the π-π* interaction and the polymerization reaction of hydrogen bond between the graphene ( rGO) and the aromatic ring of 3,4-ethylenedioxythiophene ( EDOT) monomer. Then the nickel nanoparticles ( NiNPs ) were electrodeposited on composite film to obtain a composite film-modified glassy carbon electrode ( NiNPs/PEDOT-rGO/GCE ) . The catalytic performance of NiNPs/PEDOT-rGO/GCE towards the oxidation of glucose was studied by electrochemical method. The experimental results showed that the NiNPs/PEDOT-rGO/GCE could be used as a nonenzyematic sensor for detection of glucose. This method had high stability, good selectivity, wide linear range ( 2 μmol/L-58 mmol/L) and low detection limit (0. 7 μmol/L), realizing the rapid and sensitive detection of glucose.