Croatica Chemica Acta, Vol. 89 No. 3, 2016.
Izvorni znanstveni članak
https://doi.org/10.5562/cca2679
Sensitive Electrochemical Detection of Dopamine With a Nitrogen-doped Graphene Modified Glassy Carbon Electrode
Wencheng Wang
; Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, P. R. China
Shixing Gong
; College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
Wei Sun
orcid.org/0000-0002-9923-7328
; Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, P. R. China
Guangjiu Li
; College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
Yaping Lu
; College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
Jianhua Yu
; College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
Lifeng Dong
; College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
Sažetak
In this paper nitrogen-doped graphene (NG) nanosheets were used as the modifier on the surface of glassy carbon electrode (GCE). The modified electrode (NG/GCE) was further applied to the sensitive detection of dopamine (DA) by voltammetric method. Due to the unique properties of NG such as large surface area and excellent electrocatalytic activity, electrochemical response of DA was greatly enhanced on NG/GCE with a pair of well-defined redox peaks appeared on cyclic voltammogram. Electrochemical behaviors of DA on NG/GCE were carefully investigated with the electrochemical parameters calculated. Under the selected conditions the oxidation peak currents of DA had a good linear relationship with its concentration in the range from 8.0×10–7 mol L–1 to 8.0×10–4 mol L–1 with a detection limit of 2.55×10–7 mol L–1 (3σ). The proposed method was further applied to the DA injection samples determination with satisfactory results.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Ključne riječi
nitrogen-doped graphene; glassy carbon electrode; dopamine; electrochemistry
Hrčak ID:
170351
URI
Datum izdavanja:
28.9.2016.
Posjeta: 3.129 *