Fabrication of Ascorbic Acid Sensor Based on Phosphotungstic Acid/ZnO Nanofibers
10.11895/j.issn.0253-3820.140049
- VernacularTitle:基于磷钨酸/ZnO纳米纤维的抗坏血酸传感器的制备与研究
- Author:
Jing WENG
;
Jingping WU
;
Fan YIN
- Publication Type:Journal Article
- Keywords:
Phosphotungstic acid;
Electrospinning;
Nanofibers;
Modified electrode;
Ascorbic acid
- From:
Chinese Journal of Analytical Chemistry
2014;(7):968-974
- CountryChina
- Language:Chinese
-
Abstract:
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.
