Acta Chimica Sinica ›› 2013, Vol. 71 ›› Issue (03): 409-416.DOI: 10.6023/A12121106 Previous Articles     Next Articles



房晓琳a, 高保娇a, 黄小卫b, 张永奇b, 顾来沅a   

  1. a 中北大学化学工程系 太原 030051;
    b 北京有色金属研究总院 北京 100088
  • 收稿日期:2012-12-27 出版日期:2013-03-14 发布日期:2013-01-04
  • 通讯作者: 高保娇
  • 基金资助:


Studies on Preparation of Cd2+ Ion Surface-Imprinted Material with High Ion Recognition Ability and Its Ion Recognition Mechanism

Fang Xiaolina, Gao Baojiaoa, Huang Xiaoweib, Zhang Yongqib, Gu Laiyuana   

  1. a Department of Chemical Engineering, North University of China, Taiyuan 030051;
    b General Research Institute for Nonferrous Metals, Beijing 100088
  • Received:2012-12-27 Online:2013-03-14 Published:2013-01-04
  • Supported by:

    Project supported by the National Science Foundation for Young Scientists of China (No. 51104023).

Hydroxyethyl methacrylate (HEMA) was graft-polymerized on micron-sized silica gel particles via surface- initiated graft-polymerization with amino/persulfate redox initiating system, obtaining the grafted particles PHEMA/SiO2 with a high grafting degree. Subsequently, the nucleophilic substitution reaction between the grafted PHEMA and 5-chloromethyl-8-hydroxyquinoline (CHQ) was carried out, and the 8-hydroxyquinoline-functionalization transformation of the grafted particles PHEMA/SiO2 was realized, preparing the functional grafted particles HQ-PHEMA/SiO2. The strong chelating adsorption property of HQ-PHEMA/SiO2 towards Cd2+ ion was deeply investigated. On that basis, the ion imprinting towards the functional grafted macromolecules HQ-PHEMA was conducted with Cd2+ ion as the template ion and dichloroether as crosslinker by using the novel surface imprinting technique found by our research group, and Cd2+ ion surface-imprinted material IIP-HQP/SiO2 was prepared. The ion recognition and combination characters of IIP-HQP/SiO2 were examined in detailed. The experimental results show that this ion imprinted material has excellent recognition selectivity and combination affinity for the template ion, Cd2+ ion. Relative to Cu2+ and Pb2+ ions as two contrast ions, the selectivity coefficients of IIP-HQP/SiO2 for Cd2+ ion reach up to 25.52 and 22.91, respectively, displaying ultrahigh ion recognition ability.

Key words: heavy metal ion, ion surface-imprinting, graft polymerization, 8-hydroxyquinoline, chelation adsorption, ion recognition