基于磷钨酸/ZnO纳米纤维的抗坏血酸传感器的制备与研究  

Fabrication of Ascorbic Acid Sensor Based on Phosphotungstic Acid/ZnO Nanofibers

作　　者：翁静[1,2] 吴静萍[2,3] 尹凡[2] 

机构地区：[1]江苏大学化学化工学院,镇江212013 [2]常熟理工学院化学与材料工程学院,常熟215500 [3]苏州大学医学部药学院,苏州215123

出　　处：《分析化学》2014年第7期968-974,共7页Chinese Journal of Analytical Chemistry

基　　金：江苏省自然科学基金(No.BK 20131191);苏州市科技发展计划(No.SYN201302)资助项目

摘　　要：利用静电纺丝技术在铂电极表面制备了氧化锌纤维膜载体,通过在氧化锌纤维表面电沉积磷钨酸,得到氧化锌负载磷钨酸修饰铂电极。扫描电镜显示氧化锌纤维呈网状结构,纤维直径约为300 nm,红外光谱法确认了磷钨酸在纤维表面的附着。研究结果表明,该电极对抗坏血酸响应快速、灵敏度高,在8.8×10-7~3.3×10-4 mol/L浓度范围内,抗坏血酸与修饰电极响应信号呈线性关系,检出限为2.5×10-7 mol/L。本研究为抗坏血酸的快速检测提供了一种新方法。A ZnO nanofibers carrier on the Pt electrode via electrospinning technology was prepared and then the Keggin phosphotungstic acid was deposited on the ZnO/Pt electrode using electrodeposition technology. The scanning electron microscopy showed that the zinc oxide fibers presented net structure and the diameter of its fiber was about 300 nanometers. The fourier transform infrared spectroscopy confirmed that the phosphotungstic acid adhered to the fiber surface. The electrochemical property of the modified electrode showed that it exhibited rapid response, excellent sensitivity and good stability, achieving rapid and accurate determination. The electrode responded linearly to ascorbic acid （ AA） in a concentration range from 8. 8 × 10-7 to 3. 3 × 10-4 mol/L with a low detection limit of 2. 5 × 10-7 mol/L. The method is promising for the development of AA detecting instrument.

关 键 词：杂多酸 静电纺丝 纳米纤维 修饰电极 抗坏血酸 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]