Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (9): 1076-1086.DOI: 10.11944/j.issn.1000-0518.2020.09.200028

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Preparation of Ion-Imprinted Polymers Based on Magnetic Graphene Oxide/MIL-101 (Cr) and Selective Adsorption of Cu(Ⅱ) and Pb(Ⅱ)

XIAO Haimeia, CAI Leia, ZHANG Zhaohuia,b,c*, CHEN Shana, ZHOU Shua, FU Jinlia   

  1. aCollege of Chemistry and Chemical Engineering,Jishou University,Jishou,Hu'nan 416000,China;
    bKey Laboratory of Mineral Cleaner Production and Exploit of Green FunctionalMaterials in Hu′nan Province,Jishou University,Jishou,Hu′nan 416000,China;
    cState Key Laboratory of Chemo Biosensing and Chemometrics,Hu′nan University,Changsha 410082,China
  • Received:2020-01-20 Published:2020-09-01 Online:2020-09-09
  • Contact: ZHANG Zhaohui, professor; Tel/Fax:0743-8563911;; Research interests:preparation and application of imprinting materials
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21767011, No.21565014), the Hunan Province Graduate Student Scientific Research Innovation Project(No.CX2018B705), and the Hunan Province Manganese Zinc and Vanadium Industry Technology Collaborative Innovation Center Research and Innovation Project(No.2018mzvg006)

Abstract: A type of magnetic ion-imprinted polymer based on magnetic graphene oxide/MIL-101(Cr) was synthesized with surface imprinting technology using magnetic graphene oxide/MIL-101(Cr) composite as the supporting material, Cu(Ⅱ), Pb(Ⅱ) as the templates, and dopamine as the functional monomer. Fourier-transform infrared spectroscopy, scanning electron microscopy, and vibrating sample magnetometry were used to characterize the morphology, particle size, and magnetic properties of the magnetic ion-imprinted polymer. The adsorption kinetics, isothermal adsorption performance and adsorption selectivity of the magnetic ion-imprinted polymer toward Cu(Ⅱ) and Pb(Ⅱ) were investigated in details. The results show that the magnetic ion-imprinted polymer has a superior adsorption performance toward Cu(Ⅱ) and Pb(Ⅱ) with the maximum adsorption capacity of 144.92 and 322.58 mg/g, respectively. The magnetic solid-phase extraction conditions were optimized in details. The magnetic ion-imprinted polymer was successfully used for the separation and detection of trace amounts of Cu(Ⅱ) and Pb(Ⅱ) in water samples. The recoveries of Cu(Ⅱ) and Pb(Ⅱ) are 81.99%~89.91% and 81.24%~95.15%, respectively.

Key words: magnetic ion-imprinted polymer, surface imprinting, metal ion, magnetic graphene oxide, MIL-101(Cr)