Chinese Journal of Applied Chemistry ›› 2017, Vol. 34 ›› Issue (4): 456-463.DOI: 10.11944/j.issn.1000-0518.2017.04.160268

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Preparation and Application of Magnetic Multi-ion Imprinted Polymers Based on Multiwalled Carbon Nanotubes

XIE Dandana,YAN Liangb,YIN Yuliab,ZHANG Zhaohuiabc(),WANG Jingab   

  1. aCollege of Chemistry and Chemical Engineering
    bKey Laboratory of Mineral Cleaner Production and Exploit of Green Functional Materials 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:2016-06-29 Accepted:2016-11-16 Online:2017-03-31 Published:2017-03-31
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21267010, No.21565014), Open Foundation of Hunan Province Laboratory of Mineral Cleaner Production and Green Functional Materials, and Science(No.MCPEGFM-200602) and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province

Abstract:

Novel magnetic multi-ion imprinted polymers(MIIPs) were synthesized using magnetic multi-walled carbon nanotubes as the supporting materials, Co2+, Cu2+ and Cd2+ as the multi-template and dopamine as the functional monomer. The MIIPs were characterized with Fourier-transform infrared spectrometry, transmission electron microscope, scanning electron microscope and vibrating sample magnetometer in details. Adsorption performance of the MIIPs was investigated by magnetic solid phase extraction and atomic absorption spectroscopy. The results reveal that the MIIPs have outstanding magnetic property, high adsorption capacity, high selectivity and fast binding kinetics toward Cu2+, Co2+and Cd2+ with the maximum adsorption capacity of 46.08 mg/g, 36.35 mg/g and 30.65 mg/g, respectively. Combined with atomic absorption spectroscopy, MIIPs were successfully used to separate and enrich Cu2+, Co2+and Cd2+ in real sludge samples with the enrichment factor of 18.6, 13.4 and 10.9, respectively.

Key words: magnetic multi-ion imprinted polymers, polydopamine, heavy metal ion, magnetic solid phase extraction