Hybrid graphene oxide/DAB-Am-16 dendrimer: Preparation,characterization chemical reactivity and their electrocatalytic detection of l-Dopamine |
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| Institution: | 1. Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2, Ireland;2. School of Chemistry, Trinity College Dublin, Dublin 2, Ireland;1. Polymer Research Laboratory, Department of Chemistry, Sharif University of Technology, Azadi Avenue, P.O. Box 11365-9516, Tehran, Iran;2. Department of Chemistry, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait;1. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, PR China;2. Department of Fundamental Subject, Tianjin Chengjian University, Tianjin 300384, PR China;3. National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, PR China;4. Department of Physics, Tianjin University, Tianjin 300350, PR China |
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| Abstract: | Graphene oxide (GO) was chemically modified with a poly(propylene)imine Generation 3.0 dendrimer (DAB-Am-16). The characterization, structure and properties of hybrid graphene oxide/DAB-Am-16 dendrimer was studied by Raman spectroscopy, Fourier-Transforming Infrared Spectroscopy (FT-IR), X-Ray Photoelectron Spectroscopic (XPS), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Thermogravimetric analysis. After functionalized the hybrid material (GOD) can interact with copper and subsequently with hexacyanoferrate (III) ions (GODHCu). The GODHCu incorporated into a graphite paste electrode (20% w/w) was applied to an electrocatalytic detection of neurotransmitter l-dopamine using differential pulse voltammetry. The analytical curve showed a linear response in the concentration range from 1.0 × 10?7 to 1.0 × 10?5 mol L?1 with a corresponding equation Y(A) = 1.706 × 10?5 + 0.862 l-dopamine] and a correlation coefficient r2 = 0.998. The detection limit was 6.36 × 10?7 mol L?1 with a relative standard deviation of ±4% (n = 3) and an amperometric sensitivity of 0.862 A/mol L?1. |
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| Keywords: | Surfaces Chemical synthesis Electrochemical measurements Photoelectron spectroscopy Raman spectroscopy Electrochemical properties |
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