期刊
MICROCHEMICAL JOURNAL
卷 145, 期 -, 页码 899-907出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.microc.2018.12.006
关键词
Luteolin; Graphene quantum dots; Gold nanoparticles; Electrochemical sensor
资金
- Project of Department of Education of Anhui Province [KJ2017A506]
- Key Research and Development Program of Anhui Province [1804a09020075]
- Key Discipline of Anhui Science and Technology University [AKZDXK2015A01]
- Foundation of Anhui Science and Technology University [ZRC2016485]
- Students Platform for Innovation and Entrepreneurship Training Program of China [201710879014, 201710879016]
A simple and sensitive electrochemical sensor based on graphene quantum dots (GQDs) and gold nanoparticles (GNPs) nanocomposite modified glassy carbon electrode (GQDs/GNPs/GCE) was developed for the determination of luteolin. The GQDs/GNPs/GCE was prepared by electrodeposition method, and characterized by scanning electron microscopy and electrochemical impedance spectroscopy. The GQDs/GNPs nanocomposite showed excellent synergistic electrochemical activity for the oxidation of luteolin. Compared to bare GCE, the GQDs/GNPs/GCE resulted in a 16-fold increase in the oxidation current of luteolin in phosphate buffer at pH 5.0. Using the differential pulse voltammetry method, the dependence of the oxidation current vs. concentration was found to be linear from 1 x 10(-8) to 1 x 10(-8)M with a regression coefficient of 0.997, and the detection limit of luteolin was 1.0 nM (S/N = 3). The recovery was between 98.8% and 101.4% in peanut hull samples. This strategy might enable more opportunities for the electrochemical determination of luteolin in practical applications.
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