交联镍纳米片修饰电极用于无酶葡萄糖传感器  

Interconnected network of Ni nanoplates as an efficient nonenzymatic glucose sensor

作　　者：印德琴 江平[1] 胡中园[1] 亢禄琪 何代平[1] 

机构地区：[1]重庆师范大学化学学院绿色合成与应用重点实验室,重庆400047

出　　处：《分析试验室》2015年第3期362-365,共4页Chinese Journal of Analysis Laboratory

基　　金：重庆师范大学大学生创新创业训练计划项目(201310637015);重庆师范大学校级重点项目(12XLZ13);重庆师范大学博士启动基金项目(11XB009)资助

摘　　要：以滴涂法在玻碳电极表面修饰一层阳离子交换聚合物Nafion膜,通过离子交换将Ni2＋固定于电极表面,进一步电化学沉积得到相互交联的Ni纳米片。Ni纳米片修饰电极能催化葡萄糖的电化学氧化,可用于无酶葡萄糖传感器的构建。在0.60 V恒电位条件下,Ni纳米片修饰电极的氧化峰电流随葡萄糖浓度的增大而增大,其线性响应浓度范围为0.02~3.85 mmol/L。传感器的检测灵敏度为150.6μA（mmol/L）-1·cm-2,检出限为5μmol/L,响应时间为5 s。传感器应用于葡萄糖注射液的检测,加标回收率为90.0%。Interconnected network of Ni nanoplates（ Ni NPs） was prepared with a two-step process,with the first step to absorb Ni2 ＋onto Nafion films through ion-exchange,and then the second step to convert Ni2 ＋into Ni nanostructure via electrodeposition. Ni NPs modified glass carbon electrode（ Ni NPs / GCE） exhibited efficient catalytic activity towards glucose oxidation,and thus was applied to the fabrication of a nonenzymatic sensor for electrochemical detection of glucose. At 0. 60 V,the amperometric response of Ni NPs / GCE in alkaline medium was found to be linear with glucose concentration ranging from 0. 02 mmol / L to 3. 85 mmol / L. The sensor shows a sensitivity of 150. 6（ μA mmol / L）-1·cm-2,a low detection limit of 5 μmol/L and a rapid response time of5 s. Additional,the sensor exhibits good reproducibility and long-term stability,as well as high selectivity with no interference from other oxidable species such as UA and AA. The presented sensor was successfully applied to the determination of glucose in glucose injection with the recovery of 94. 5%.

关 键 词：NAFION膜 离子交换 电沉积 Ni纳米片 无酶葡萄糖传感 

分 类 号：O657.1[理学—分析化学]