应用化学 ›› 2020, Vol. 37 ›› Issue (9): 1076-1086.DOI: 10.11944/j.issn.1000-0518.2020.09.200028

• 研究论文 • 上一篇    下一篇

磁性氧化石墨烯/MIL-101(Cr)表面金属离子印迹聚合物制备及其对Cu(Ⅱ)和Pb(Ⅱ)选择性吸附

肖海梅a, 蔡蕾a, 张朝晖a,b,c*, 陈珊a, 周姝a, 符金利a   

  1. 吉首大学a化学化工学院; b矿物清洁生产与绿色功能材料开发湖南省重点实验室 湖南 吉首 416000;
    c湖南大学化学生物传感器与计量国家重点实验室 长沙 410082
  • 收稿日期:2020-01-20 出版日期:2020-09-01 发布日期:2020-09-09
  • 通讯作者: 张朝晖,教授; Tel/Fax:0743-8563911; E-mail:zhaohuizhang77@163.com; 研究方向:印迹材料研制及应用
  • 基金资助:
    国家自然科学基金(21767011,21565014)、湖南省研究生科研创新项目(CX2018B705)和湖南省锰锌钒产业技术协同创新中心项目(2018mzvg006)资助

Preparation of Ion-Imprinted Polymers Based on Magnetic Graphene Oxide/MIL-101 (Cr) and Selective Adsorption of Cu(Ⅱ) and Pb(Ⅱ)

XIAO Haimeia, CAI Leia, ZHANG Zhaohuia,b,c*, CHEN Shana, ZHOU Shua, FU Jinlia   

  1. aCollege of Chemistry and Chemical Engineering,Jishou University,Jishou,Hu'nan 416000,China;
    bKey Laboratory of Mineral Cleaner Production and Exploit of Green FunctionalMaterials in Hu′nan Province,Jishou University,Jishou,Hu′nan 416000,China;
    cState Key Laboratory of Chemo Biosensing and Chemometrics,Hu′nan University,Changsha 410082,China
  • Received:2020-01-20 Published:2020-09-01 Online:2020-09-09
  • Contact: ZHANG Zhaohui, professor; Tel/Fax:0743-8563911; E-mail:zhaohuizhang77@163.com; Research interests:preparation and application of imprinting materials
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21767011, No.21565014), the Hunan Province Graduate Student Scientific Research Innovation Project(No.CX2018B705), and the Hunan Province Manganese Zinc and Vanadium Industry Technology Collaborative Innovation Center Research and Innovation Project(No.2018mzvg006)

摘要: 本文以磁性氧化石墨烯/MIL-101(Cr)复合材料为载体,以Cu(Ⅱ)和Pb(Ⅱ)模板,多巴胺(DA)为功能单体,采用表面印迹技术成功制备一种对Cu(Ⅱ)和Pb(Ⅱ)具有高选择吸附性能的磁性离子印迹聚合物。 采用傅里叶变换红外光谱、扫描电子显微镜和振动样品磁强计等技术对该磁性离子印迹聚合物的形貌、粒径大小和磁性能进行表征。 详细探讨了该磁性离子印迹聚合物对Cu(Ⅱ)和Pb(Ⅱ)的吸附动力学、等温吸附性能及吸附选择性,结果表明该磁性离子印迹聚合物对Cu(Ⅱ)和Pb(Ⅱ)最大吸附量分别为144.92和322.58 mg/g。 优化了磁固相萃取条件,该磁性离子印迹聚合物成功用于水样中微量Cu(Ⅱ)和Pb(Ⅱ)的分离和检测,Cu(Ⅱ)和Pb(Ⅱ)的回收率分别为81.99%~89.91%和81.24%~95.15%。

关键词: 磁性印迹聚合物, 表面印迹, 重金属离子, 磁性氧化石墨烯, MIL-101(Cr)

Abstract: A type of magnetic ion-imprinted polymer based on magnetic graphene oxide/MIL-101(Cr) was synthesized with surface imprinting technology using magnetic graphene oxide/MIL-101(Cr) composite as the supporting material, Cu(Ⅱ), Pb(Ⅱ) as the templates, and dopamine as the functional monomer. Fourier-transform infrared spectroscopy, scanning electron microscopy, and vibrating sample magnetometry were used to characterize the morphology, particle size, and magnetic properties of the magnetic ion-imprinted polymer. The adsorption kinetics, isothermal adsorption performance and adsorption selectivity of the magnetic ion-imprinted polymer toward Cu(Ⅱ) and Pb(Ⅱ) were investigated in details. The results show that the magnetic ion-imprinted polymer has a superior adsorption performance toward Cu(Ⅱ) and Pb(Ⅱ) with the maximum adsorption capacity of 144.92 and 322.58 mg/g, respectively. The magnetic solid-phase extraction conditions were optimized in details. The magnetic ion-imprinted polymer was successfully used for the separation and detection of trace amounts of Cu(Ⅱ) and Pb(Ⅱ) in water samples. The recoveries of Cu(Ⅱ) and Pb(Ⅱ) are 81.99%~89.91% and 81.24%~95.15%, respectively.

Key words: magnetic ion-imprinted polymer, surface imprinting, metal ion, magnetic graphene oxide, MIL-101(Cr)