碳纸负载碳酸氢镍纳米颗粒的无酶葡萄糖电化学传感器

Nickel Bicarbonate Nanoparticles Loaded on Carbon Paper for Enzyme-Free Glucose Electrochemical Sensor

通过一步水热法在碳纸上原位生长碳酸氢镍纳米颗粒,利用粉末X射线衍射和扫描电子显微镜对材料的结构及形貌进行表征,发现碳纸上负载纯相Ni(HCO3)2时具有较多的催化活性位点,利于葡萄糖的催化氧化反应进行。循环伏安法和时间-电流响应曲线表明该电极的检测限为0.98μmol·L^(-1),线性范围为2.95~1.02 mmol·L^(-1),灵敏度为935μA·L·mmol^(-1)·cm^(-2)同时具有优异的选择性及稳定性。此外,该传感器能够实现对乳制品中葡萄糖的快速检测。这些结果表明,过渡金属和导电基底的协同作用会增强复合材料整体的导电性能和催化性能。

Nickel bicarbonate nanoparticles were grown in situ on carbon paper by one-step hydrothermal method.Powder X-ray diffraction and scanning electron microscopy were used to characterize the structure and morphology of the material.It was found that when pure phase Ni(HCO3)2 was loaded on carbon paper,it could provide more cat-alytically active sites which is beneficial to electron transport and catalytic reaction.Cyclic voltammetry and time-current response curves showed that the detection limit of the electrode was 0.98μmol·L^(-1),the linear range was 2.95-1.02 mmol·L^(-1),and the sensitivity was 935μA·L·mmol^(-1)·cm^(-2).At the same time,it also exhibited excellent specificity and stability.In addition,the sensor can realize the rapid detection of glucose in dairy products.These results show that the synergistic effect of transition metal and conductive substrate can enhance the overall conduc-tivity and catalytic performance of the composite material.