title: Nafion covered core-shell structured Fe3O4@graphene nanospheres modified electrode for highly selective detection of dopamine.
abstract: Nafion covered core-shell structured Fe3O4@graphene nanospheres (GNs) modified glassy carbon electrode (GCE) was successfully prepared and used for selective detection dopamine. Firstly, the characterizations of hydro-thermal synthesized Fe3O4@GNs were investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Raman spectroscopy. Then Fe3O4@GNs/Nafion modified electrode exhibited excellent electrocatalytic activity toward the oxidations of dopamine (DA). The interference test showed that the coexisted ascorbic acid (AA) and uric acid (UA) had no electrochemical interference toward DA. Under the optimum conditions, the broad linear relationship was obtained in the experimental concentration from 0.020 μM to 130.0 μM with the detection limit (S/N=3) of 0.007 μM. Furthermore, the core-shell structured Fe3O4@GNs/Nafion/GCE was applied to the determination of DA in real samples and satisfactory results were got, which could provide a promising platform to develop excellent biosensor for detecting DA.
authors.affiliation: College of Chemistry and Environment, Minnan Normal University, Zhangzhou 363000, PR China.
authors.forename: Wuxiang
authors.initials: W
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Environment, Minnan Normal University, Zhangzhou 363000, PR China.
authors.forename: Jianzhong
authors.initials: J
authors.lastname: Zheng
authors.affiliation: College of Chemistry and Environment, Minnan Normal University, Zhangzhou 363000, PR China.
authors.forename: Jiangu
authors.initials: J
authors.lastname: Shi
authors.affiliation: College of Chemistry and Environment, Minnan Normal University, Zhangzhou 363000, PR China.
authors.forename: Zhongqiu
authors.initials: Z
authors.lastname: Lin
authors.affiliation: College of Chemistry and Environment, Minnan Normal University, Zhangzhou 363000, PR China.
authors.forename: Qitong
authors.initials: Q
authors.lastname: Huang
authors.affiliation: College of Chemistry and Environment, Minnan Normal University, Zhangzhou 363000, PR China.
authors.forename: Hanqiang
authors.initials: H
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Environment, Minnan Normal University, Zhangzhou 363000, PR China.
authors.forename: Chan
authors.initials: C
authors.lastname: Wei
authors.affiliation: College of Chemistry and Environment, Minnan Normal University, Zhangzhou 363000, PR China; Fujian Province University Key Laboratory of Analytical Science, Minnan Normal University, Zhangzhou 363000, PR China.
authors.forename: Jianhua
authors.initials: J
authors.lastname: Chen
authors.affiliation: College of Chemistry and Environment, Minnan Normal University, Zhangzhou 363000, PR China; Fujian Province University Key Laboratory of Analytical Science, Minnan Normal University, Zhangzhou 363000, PR China; School of Chemistry & Chemical Engineering, Shandong University, Jinan 250100, PR China. Electronic address: Hushirong6666@163.com.
authors.forename: Shirong
authors.initials: S
authors.lastname: Hu
authors.affiliation: School of Chemistry & Chemical Engineering, Shandong University, Jinan 250100, PR China.
authors.forename: Aiyou
authors.initials: A
authors.lastname: Hao
mesh_terms: D002138:Calibration; D004298:Dopamine / Q000032:analysis*; D004566:Electrodes; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D005465:Fluorocarbon Polymers / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D057230:Limit of Detection; D054118:Nanospheres / Q000737:chemistry*; D013696:Temperature
chemical_list: D005465:Fluorocarbon Polymers; C040402:perfluorosulfonic acid; D006108:Graphite; D004298:Dopamine; D052203:Ferrosoferric Oxide
keywords: Core–shell structure; Dopamine; Electrochemistry; Fe(3)O(4)@graphene nanospheres/Nafion