CJCU

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (12): 2763.

• Articles • Previous Articles     Next Articles

Preparation and Adsorption Properties of Magnetic Fe3O4@SiO2@CS Cadmium Ion-imprinted Polymer

ZHANG Ming-Lei1, ZHANG Zhao-Hui1,2*, LUO Li-Juan1, YANG Xiao1,  LIU Yu-Nan1, NIE Li-Hua2   

  1. 1. College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China;
    2. State Key Laboratory of Chemo/Biosensing & Chemometrics, Hunan University, Changsha 410082, China
  • Received:2010-12-28 Revised:2011-03-24 Online:2011-12-10 Published:2011-11-25
  • Contact: ZHANG Zhao-Hui E-mail:zhaohuizhang77@163.com
  • Supported by:

    国家自然科学基金(批准号: 21005030)、湖南省教育厅重点项目(批准号: 10A099)、化学生物传感与计量国家重点实验室开放基金(批准号: 2008007)和湖南省吉首大学研究生创新课题基金(批准号: JGY201013)资助.

PDF (PC)

Cited

7

Abstract: Magnetic Fe3O4@SiO2@CS cadmium ion-imprinted polymer(M-IIP) was prepared on the surface of silica-coated Fe3O4 nanoparticles using chitosan(CS) as functional monomer, and γ-glycidoxypropyltrimethoxysilane(GPTMS) as cross-linker. The imprinted material was characterized with scanning electron microscope(SEM) and infrared spectrum technique. The results indicated that the imprinted layer was grafted on the magnetic Fe3O4 surface, and a cubic morphological characteristic of M-IIP with edge length of 60—120 nm was observed. The selective experiment results show that the adsorption kinetics of M-IIP toward Cd(Ⅱ) is fit to pseudo first-order kinetic isotherms capacity experiment. The relative selectivity coefficient of M-IIP toward Cd(Ⅱ)/Cu(Ⅱ), Cd(Ⅱ)/Zn(Ⅱ), Cd(Ⅱ)/Pb(Ⅱ) and Cd(Ⅱ)/Hg(Ⅱ) were 2.92, 3.43, 8.97 and 9.20, respectively. The M-IIP was employed successfully to extract Cd(Ⅱ) from aqueous solution coupled with atomic absorption spectrometry(AAS) with a recovery of >98%.

Key words: Core shell, Fe3O4@SiO2@CS, Magnetic ion-imprinting polymer, Cd(Ⅱ) ion

TrendMD: