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Electrochemical detection dopamine by Ester-calix[n]arenes/graphene nanosheets modified electrodes
- Source :
- Journal of Electroanalytical Chemistry. 804:16-22
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- In this study, graphene nanosheets (GN) were modified by three ester-calix[n]arenes (ECnA, n = 4, 6, 8) using a simple self-assembly strategy. Three obtained ECnA/GN nanocomposites were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscope and electrochemical impedance spectroscopy, which confirmed that the various amount of ECnA molecules had been effectively loaded onto the surface of GN. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) measurements showed that the ECnA/GN modified electrodes exhibited high supramolecular recognition and enrichment capability and consequently displayed high electrochemical response toward dopamine (DA). At low concentration of guest molecule, the ECnA/GN modified electrodes show the better enrichment performances. Especially, EC8A/GN modified electrode exhibited an excellent electrochemical performance for DA with high current densities of 4.46 mA mmol − 1 L cm − 2 , broad linear range (0.5 to 400 μM) and low detection limit (0.2 μM) at a signal-to-noise ratio of 3.
- Subjects :
- Scanning electron microscope
Graphene
Chemistry
General Chemical Engineering
Analytical chemistry
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
0104 chemical sciences
Analytical Chemistry
law.invention
Dielectric spectroscopy
law
Electrode
Differential pulse voltammetry
Fourier transform infrared spectroscopy
Cyclic voltammetry
0210 nano-technology
Subjects
Details
- ISSN :
- 15726657
- Volume :
- 804
- Database :
- OpenAIRE
- Journal :
- Journal of Electroanalytical Chemistry
- Accession number :
- edsair.doi...........d003208e12e694802f2ef42cdbbd217f