Chinese Journal of Applied Chemistry ›› 2019, Vol. 36 ›› Issue (3): 341-348.DOI: 10.11944/j.issn.1000-0518.2019.03.180160

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Multiple Metal Ion Imprinted Electrochemical Sensor with Enhanced Sensitivity by Graphene Oxide-C60 Composite

XING Chenlia,WANG Jinga,ZHANG Zhaohuiab*(),XIE Dandana,LÜ Piaopiaoa   

  1. aNational Demonstration Center for Experimental Chemistry Education,College of Chemistry and Chemical Engineering,Jishou University,Jishou,Hunan 416000,China
    bState Key Laboratory of Chemo/Biosensing and Chemometrics,Hunan University,Changsha 410082,China
  • Received:2018-05-08 Accepted:2018-07-20 Online:2019-03-01 Published:2019-02-28
  • Contact: ZHANG Zhaohui
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21767011, No.21565014), the Innovation Fund Designated for Graduate Students of Jishou University and the Collaborative Innovation Center 2011 of Hunan Province

Abstract:

A novel multiple-ion imprinted sensor based on graphene oxide/fullerene composite(GO-C60) was developed for simultaneous and selective determination of Pb(Ⅱ), Cd(Ⅱ) and Cu(Ⅱ). The multiple-ion imprinted polymer was prepared with methacrylic acid and edetic acid as the functional monomer and ligand, respectively. The multiple-ion imprinted sensor was prepared by dispensing the imprinted polymer onto the GO-C60 modified carbon electrode surface. The performance of multiple-ion imprinted sensor was investigated using cyclic voltammetry, differential pulse voltammetry and electrochemical impedance spectroscopy in details. Under the optimized conditions, a linear relationship existed between the response currents of the multiple-ion imprinted sensor and the negative logarithm of ion concentrations ranging from 1.0×10-9 mol/L to 5.0×10-7 mol/L with the detection limit of 5.0×10-10, 5.0×10-10 and 1.0×10-10 mol/L for Pb(Ⅱ), Cd(Ⅱ) and Cu(Ⅱ), respectively. The multiple-ion imprinted sensor was successfully used for simultaneous detection of trace level Pb(Ⅱ), Cd(Ⅱ) and Cu(Ⅱ) ions in real samples.

Key words: multiple metal ions, imprinting, electrochemical sensor, graphene oxide/fullerene composite