具有高离子识别能力的镉离子表面印迹材料的制备及其离子识别机理的研究

doi:10.6023/A12121106

化学学报 ›› 2013, Vol. 71 ›› Issue (03): 409-416.DOI: 10.6023/A12121106 上一篇下一篇

研究论文

具有高离子识别能力的镉离子表面印迹材料的制备及其离子识别机理的研究

房晓琳^a, 高保娇^a, 黄小卫^b, 张永奇^b, 顾来沅^a

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

投稿日期:2012-12-27 发布日期:2013-01-04
通讯作者: 高保娇 E-mail:gaobaojiao@126.com
基金资助:
项目受国家青年科学基金(No.51104023)资助.

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

Fang Xiaolin^a, Gao Baojiao^a, Huang Xiaowei^b, Zhang Yongqi^b, Gu Laiyuan^a

a Department of Chemical Engineering, North University of China, Taiyuan 030051;
b General Research Institute for Nonferrous Metals, Beijing 100088

Received:2012-12-27 Published:2013-01-04
Supported by:
Project supported by the National Science Foundation for Young Scientists of China (No. 51104023).

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1. 具有高离子识别能力的镉离子表面印迹材料的制备及其离子识别机理的研究.PDF(98KB)

摘要/Abstract

采用氨基-过硫酸盐氧化还原引发体系, 先实现了甲基丙烯酸羟乙酯(HEMA)在微米级硅胶微粒表面的引发接枝聚合, 制得高接枝度的接枝微粒PHEMA/SiO₂. 然后使接枝大分子PHEMA的侧羟基与5-氯-8-羟基喹啉(CHQ)发生亲核取代反应, 将8-羟基喹啉(HQ)基团键合在接枝大分子侧链, 使接枝大分子PHEMA实现8-羟基喹啉功能化转变, 制得表面含有高密度HQ基团的功能接枝微粒HQ-PHEMA/SiO₂, 考察研究了功能微粒HQ-PHEMA/SiO₂对Cd²⁺离子的强螯合吸附作用. 在此基础上, 采用本课题组建立的新的分子表面印迹技术, 以Cd²⁺离子为模板离子, 二氯乙醚为交联剂, 对接枝在硅胶表面的功能大分子链HQ-PHEMA进行了离子印迹, 制备了Cd²⁺离子表面印迹材料IIP-HQP/SiO₂, 深入考察研究了其离子识别与结合特性. 实验结果表明, 该离子表面印迹材料对Cd²⁺离子具有特异的识别选择性与优良的结合亲和性, 相对于Cu²⁺和Pb²⁺两种对比离子, 印迹材料IIP-HQP/SiO₂对Cd²⁺离子的识别选择性系数分别高达25.52和22.91, 显示出超高的离子识别能力.

关键词: 重金属离子, 离子表面印迹, 接枝聚合, 8-羟基喹啉, 螯合吸附, 离子识别

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

引用此文

房晓琳, 高保娇, 黄小卫, 张永奇, 顾来沅. 具有高离子识别能力的镉离子表面印迹材料的制备及其离子识别机理的研究[J]. 化学学报, 2013, 71(03): 409-416.

Fang Xiaolin, Gao Baojiao, Huang Xiaowei, Zhang Yongqi, Gu Laiyuan. Studies on Preparation of Cd²⁺ Ion Surface-Imprinted Material with High Ion Recognition Ability and Its Ion Recognition Mechanism[J]. Acta Chimica Sinica, 2013, 71(03): 409-416.

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具有高离子识别能力的镉离子表面印迹材料的制备及其离子识别机理的研究

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

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具有高离子识别能力的镉离子表面印迹材料的制备及其离子识别机理的研究

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

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