Pt/CoMoO_(4)纳米复合材料的制备及对葡萄糖电催化

Preparation of Pt/CoMoO_(4) Nanocomposites and Their Electrocatalysis for Glucose

超灵敏和高抗干扰性葡萄糖检测对于糖尿病的临床诊断相当重要。采用水热法在泡沫镍基体上生长CoMoO_(4)纳米棒,进一步利用电化学沉积技术在CoMoO_(4)上制备纳米Pt,获得Pt/CoMoO_(4)复合材料。扫描电子显微镜显示纳米Pt的直径约为30 nm,均匀分散在CoMoO4纳米棒表面。利用循环伏安法和计时安培法研究了不同材料对葡萄糖的电催化性能,结果表明,Pt/CoMoO_(4)具有优异的葡萄糖检测性能,响应电流与葡萄糖浓度在1µmol/L∼0.5mmol/L和0.5∼3 mmol/L范围内呈现良好的线性关系,灵敏度为4.59 mA·mmol·L^(-1)·cm^(-2),检测限为0.3µmol/L,显现了纳米Pt与CoMoO_(4)纳米棒的协同效应。该电极具有响应时间短、灵敏度高、抗干扰能力强等优点,是一种成本低、实用性能高的葡萄糖检测电极。

Ultra-sensitive and anti-interference glucose testing is important for the clinical diagnosis of diabetes.In this paper,CoMoO_(4) nanorods were grown on nickel foam by hydrothermal method.Then,the Pt nanoparticles were prepared on CoMoO_(4) by electrochemical deposition method to obtain Pt/CoMoO_(4) composites.The scanning electron microscopy showed that the diameter of Pt was about 30 nm,which was uniformly dispersed on the surface of CoMoO_(4) nanorods.The cyclic voltammetry and chronoamperometry method were used to investigate the electrocatalytic properties of the prepared materials toward glucose.The results showed that the Pt/CoMoO_(4) has excellent glucose detection performance.The response current and glucose concentration have a good linear relation in the range of 1µmol/L–0.5 mmol/L and 0.5–3 mmol/L.The sensitivity is 4.59 mA·mmol·L^(-1)·cm^(-2) with a detection limit of 0.33µmol/L.The electrode has short response time,high sensitivity and strong anti-interference ability,which is a low-cost and high practical performance of glucose detection electrode.