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

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Abstract

The present work reports a facile and direct electrochemical method for sensing of trace Cu2+ by employing amino-functionalized graphene (NH2–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 (NH2–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 NH2–G/Cs modified glassy carbon electrode for the determination of Cu2+ was evaluated by differential pulse voltammetry (DPV). Under optimized operating conditions, the sensor linearly responded to Cu2+ 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 NH2–G/Cs/GCE achieved high selectivity and sensitivity for the analysis of trace Cu2+ in water samples.

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Authors and Affiliations

  1. Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, Key Laboratory of Polymer, Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China

    Zunli Mo, Huandong Liu, Rere Hu, Hao Gou, Zhenliang Li & Ruibin Guo

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  1. Zunli Mo
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  2. Huandong Liu
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  3. Rere Hu
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  4. Hao Gou
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  5. Zhenliang Li
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  6. Ruibin Guo
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Correspondence to Zunli Mo.

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Mo, Z., Liu, H., Hu, R. et al. Amino-functionalized graphene/chitosan composite as an enhanced sensing platform for highly selective detection of Cu2+ . Ionics 24, 1505–1513 (2018). https://doi.org/10.1007/s11581-017-2309-1

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  • DOI: https://doi.org/10.1007/s11581-017-2309-1

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