碳纳米管负载氢氧化镍修饰电极的制备及应用

采用表面滴涂结合循环伏安法制备了碳纳米管负载氢氧化镍修饰电极(Ni(OH)2/MWNT/CCE)。研究了该修饰电极对葡萄糖的电催化氧化性能。结果表明,该修饰电极对葡萄糖具有良好的电催化氧化活性。在优化条件下,安培法检测葡萄糖的线性范围为2.0×10-7～5.7×10-4 mol.L-1(r=0.999 9,s=2 786.5μA.(mmol.L-1)-1.cm-2)和5.7×10-4～2.7×10-3 mol.L-1(r=0.999 1,s=2 005.2μA.(mmol.L-1)-1.cm-2),检出限(3sb)为8.0×10-8 mol.L-1。该法已成功用于血清中葡萄糖含量的测定。

Electrocatalytic Oxidation of Glucose on Ni(OH)2/MWNT/CCE in Alkaline Solution

A nickel hydroxide-multi-wall carbon nanotubes modified ceramic carbon electrode(Ni(OH)2/MWNT/CCE) was fabricated by using surface coating method and cyclic voltammetry,and characterized by XRD technique and scanning electron microscopy(SEM).The electrocatalytic activity for glucose on the modified electrode was investigated by cyclic voltammetry and amperometric method.The results showed that the modified electrode exhibited a high electrocatalytic activity for the oxidation of glucose.Based on this,an amperometry technique for the determation of glucose was established.Under the optimum conditions,the oxidation peak current had linear relationships with concertration of glucose over the ranges of 2.0×10-7-5.7×10-4 mol·L-1(r=0.999 9 and 5.7×10-4-2.7×10-3 mol·L-1(r=0.999 1),with sensitivities of 2 786.5 μA·(mmol·L-1)-1·cm-2and 2 005.2 μA·(mmol·L-1)-1·cm-2,respectively.The detection limit(3sb) was 8.0×10-8 mol · L-1.The proposed method was successfully applied in the detection of glucose in serum.