Amino-functionalized graphene/chitosan composite as an enhanced sensing platform for highly selective detection of Cu2

The present work reports a facile and direct electrochemical method for sensing of trace Cu 2+ by employing amino-functionalized graphene (NH 2 –G) and chitosan (Cs) as enhanced sensing platform. Amino-functionalized graphene was prepared by using a simple and effective solvothermal method and chara...

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Veröffentlicht in:Ionics 2018-05, Vol.24 (5), p.1505-1513
Hauptverfasser: Mo, Zunli, Liu, Huandong, Hu, Rere, Gou, Hao, Li, Zhenliang, Guo, Ruibin
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Sprache:eng
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Zusammenfassung:The present work reports a facile and direct electrochemical method for sensing of trace Cu 2+ by employing amino-functionalized graphene (NH 2 –G) and chitosan (Cs) as enhanced sensing platform. Amino-functionalized graphene was prepared by using a simple and effective solvothermal method and characterized by Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS). The novel amino-functionalized graphene/chitosan (NH 2 –G/Cs) composite was facilely prepared by sonochemical method. After being characterized with cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), some relevant parameters influencing the sensor response were investigated and optimized. Analytical performance of the NH 2 –G/Cs modified glassy carbon electrode for the determination of Cu 2+ was evaluated by differential pulse voltammetry (DPV). Under optimized operating conditions, the sensor linearly responded to Cu 2+ concentration in the range from 0.4 to 40 μmol/L with a detection limit of 0.064 μmol/L ( S / N  = 3). Most importantly, the NH 2 –G/Cs/GCE achieved high selectivity and sensitivity for the analysis of trace Cu 2+ in water samples.
ISSN:0947-7047
1862-0760
DOI:10.1007/s11581-017-2309-1