一种基于钯-镍/硅纳米线的二量程果糖传感器

摘要

Palladium-nickel/silicon nanowires were prepared by chemical deposition process and galvanostatic electro depo-sition. A two ranges no-enzyme electrochemical fructose sensor was structured with the palladium-nickel/silicon nanowire as the working electrode,Pt and saturated Ag/AgCl served as the counter and reference electrode,respectively. Cyclic voltammetry( CV) and chronoamperometry( CA) were used for detecting the fructose quantificationally in the background of 0.1 mmol / L KOH. The result of CV measures show that the range was 5 ~50 mmol / L and the sensitivity was 0.061 6 mA / ( cm2 ·mmol/L) and the result of CA measures indicat that the range was 0 ~7 mmol / L,the sensitivity was 31.185 2μA / ( cm2 ·mmol/L) and the de-tection limits was 7.6 μmol / L. This kind of electrochemical nonenzymatic sensor can detect the fructose rapidly and accurately.%利用化学沉积法和恒电流沉积法制备了钯-镍/硅纳米线( Pd-Ni/SiNWs)。以钯-镍/硅纳米线作为工作电极,铂电极为对电极,银-氯化银电极为参比电极,从而构建了一种二量程的无酶电化学果糖传感器。以0.1 mol / L KOH为背景溶液,分别采用循环伏安法( CV)和计时电流法( CA)进行果糖的定量检测。循环伏安法得出果糖检测量程为5~50 mmol / L,灵敏度为0.0616 mA/( cm2·mmol/L)；计时电流法检测果糖量程为0~7 mmol / L,灵敏度为31.1852μA /(cm2·mmol/L),检测限为7.6μmol / L。该种电化学无酶传感器可以实现果糖的快速准确检测。