高等学校化学学报

高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (12): 2763.

• 研究论文 • 上一篇    下一篇

磁性Fe3O4@SiO2@CS镉离子印迹聚合物的制备及吸附性能

张明磊1, 张朝晖1,2, 罗丽娟1, 杨潇1, 刘玉楠1,  聂利华2   

  1. 1. 吉首大学化学化工学院, 吉首 416000;
    2. 湖南大学化学生物传感与计量国家重点实验室, 长沙 410082
  • 收稿日期:2010-12-28 修回日期:2011-03-24 出版日期:2011-12-10 发布日期:2011-11-25
  • 通讯作者: 张朝晖 E-mail:zhaohuizhang77@163.com
  • 基金资助:

    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.

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.

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被引次数

25

摘要： 以SiO2包覆的纳米Fe3O4为载体, 壳聚糖(Chitosan, CS)为功能配体, γ-缩水甘油醚氧丙基三甲氧基硅烷为交联剂, 制备了磁性Fe3O4@SiO2@CS镉离子印迹聚合物(Magnetic ion-imprinted polymer, M-IIP). 采用扫描电镜和红外光谱对该磁性印迹聚合物进行了表征. 结果表明, 壳聚糖在环氧基硅烷交联作用下, 实现了印迹壳层在磁性Fe3O4表面的接枝, 该印迹材料是边长为60~120 nm的立方体. 吸附性能实验表明, M-IIP对Cd(Ⅱ)的吸附符合一级动力学吸附模型; M-IIP对Cd(Ⅱ)/Cu(Ⅱ), Cd(Ⅱ)/Zn(Ⅱ), Cd(Ⅱ)/Pb(Ⅱ)和Cd(Ⅱ)/Hg(Ⅱ)的相对选择系数分别为2.92, 3.43, 8.97和9.20. 原子吸收光谱检测结果表明, 该磁性Fe3O4@SiO2@CS离子印迹聚合物可用于水溶液中Cd(Ⅱ)的分离, Cd(Ⅱ)回收率在98%以上.

关键词: 核壳型, Fe3O4@SiO2@CS, 磁性印迹聚合物, 镉离子

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

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