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.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
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
关键词
杂多酸
静电纺丝
纳米纤维
修饰电极
抗坏血酸
Phosphotungstic acid Electrospinning Nanofibers Modified electrode Ascorbic acid
