DOI: 10.3724/SP.J.1096.2013.30116

Chinese Journal of Analytical Chemistry (分析化学) 2013/41:9 PP.1406-1412

Synthesis and Application of Novel Magnetic Lead (Ⅱ) Ion Imprinted Polymers Based on Multiwalled Carbon Nanotubes

Novel magnetic ion imprinted polymers based on vinyl-functionlized multiwalled carbon nanotubes (MWNTs@MIIPs) with highly selective adsorption toward Pb2+ were synthesized using Pb2+ as the template, methacrylic acid as the functional monomer and ethylene glycol dimethacrylate as the cross-linker. The MWNTs@MIIPs were characterized by scanning electron microscopy, Fourier-transform infrared analysis and vibrating sample magnetometer analysis. Adsorption studies demonstrated that the MWNTs@MIIPs possessed excellent adsorption and selective recognition ability towards Pb2+ with a maximum capacity of 25.9 mg/g. And the selectivity factor of MWNTs@MIIPs towards Pb2+/Cu2+, Pb2+/Zn2+ Pb2+/Co2+, Pb2+/Mg2+, Pb2+/Cd2+and Pb2+/Ni2+ was 2.3, 2.5, 2.1, 2.2, 2.1 and 2.4, respectively. Combined with atomic absorption spectrometric analysis technology, the MWNTs@MIIPs were successfully applied for separation and enrichment trace Pb2+ in environmental real samples with the enrichment factor of 40.5.

Key words:Ion imprinted,Magnetic,Multiwalled carbon nanotubes,Lead ion

ReleaseDate:2015-04-19 11:06:02

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