Quasireversible Process of Dopamine on Copper-Nickel Hydroxide Composite/Nitrogen Doped Graphene/Nafion Modified GCE
Chuan-Yin Liu1, Zhong-Yong Liu2, Rong Peng2
1School of Chemical Engineering and Food Science, Hubei University of Arts and Science, Xiangyang 441053, China ; Key Laboratory of Low Dimensional Optoelectronic Materials and Devices of Hubei Province, Xiangyang 441053, China.
Abstract:
Cu-Ni(OH)2/N-GR/Nafion/GCE has been prepared by electrodeposition and activation with NaOH. The proposed modified GCE was studied by electrochemical methods. It is found that dopamine shows favorable redox cyclic voltammetric response on the proposed modified GCE with peak separation of 25 mV and large current compared with on single-component modified GCE. The kinetic of electrode process has also been investigated with rate constant of 6.618 × 10(-3) cm/s, which can be deduced to be a quasireversible or near-reversible process. The proposed method has been used for DA detection with linear range of 1.0 × 10(-7) mol/L to 4.6 × 10(-5) mol/L, and the detection limit is 3.3 × 10(-8) mol/L. The proposed method has favorable stability and reproducibility and has also been used to determine DA in simulated samples and DA injections with favorable recoveries of 98.4% to 102.6%.
More Related Videos
09:15Iridium Oxide-reduced Graphene Oxide Nanohybrid Thin Film Modified Screen-printed Electrodes as Disposable Electrochemical Paper Microfluidic pH Sensors
Published on: November 22, 2016
07:34Gold Nanoparticle Modified Carbon Fiber Microelectrodes for Enhanced Neurochemical Detection
Published on: May 13, 2019
