期刊
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
卷 11, 期 7, 页码 5427-5440出版社
ESG
DOI: 10.20964/2016.07.59
关键词
Electrochemical determination; Differential pulse voltammetry; Single-walled carbon nanotube; Au nanosol; Esculetin
资金
- National Natural Science Foundation of China [51463008, 51302117, 51272096, 51263010]
- GanPo Outstanding Talents 555 Projects
- Jiangxi Provincial Department of Education [GJJ12595, GJJ13565]
- Youth Science and Technology Talent Training Plan of Chongqing Science and Technology Commission [CSTC2014KJRC-QNRC10006]
A novel simple, sensitive and selective electrochemical sensor was successfully prepared for the determination of esculetin in Cortex Fraxini based on the carboxylic acid-functionalized single-walled carbon nanotubes-Nafion-Au nanosol nanocomposite modified glassy carbon electrode (c-SWCNTs-NF-AuNs/GCE). Scanning electron microscopy, energy dispersive X-ray spectroscopy, electrochemical impedance spectroscopy and cyclic voltammetry were carried out to characterize the properties of c-SWCNTs-NF-AuNs nanocomposite. Owing to the synergistic effects of large surface area, superior electrical conductivity, and large amount of chemically active sites of c-SWCNTs, together with the good biocompatibility and high conductivity of AuNs, the c-SWCNTs-NF-AuNs/GCE exhibited a good electrocatalytic activity to esculetin with wide linear range of 0.004-55 mu M and low detection limit of 0.12 nM. Additionally, the modified electrode was employed for analysis of esculetin in Cortex Fraxini with satisfactory results.
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