Journal
IONICS
Volume 23, Issue 7, Pages 1889-1895Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-017-2006-0
Keywords
Graphene; Catechin; Green tea; Electrocatalysis; Electrochemical sensor
Funding
- Foundation for Innovation Team of Bioanalytical Chemistry
- National Natural Science Foundation of China [21471007]
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Herein, we present a simple and facile synthesis strategy of porous N-doped graphene (N-Gr) using a facile one-step pyrolysis method. The as-prepared N-Gr was characterized by power X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. N-Gr-modified glassy carbon electrode exhibited a lower overpotential and the higher redox peak currents for catechin during the electrochemical reaction of catechin. At the N-Gr-modified electrode, the redox process of catechin was almost reversible and displayed an adsorption-controlled redox process with a fast electron transfer rate. The linear responses of the sensor for catechin have been obtained by the differential pulse voltammetry in the range from 1.0 to 30 mu M with the calculated detection limit of 0.088 mu M (S/N = 3). The real application of catechin in Chinese green tea samples with excellent performance such as long-term stability and good reproducibility was successfully achieved.
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