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%。
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.
作者
肖海梅
蔡蕾
张朝晖
陈珊
周姝
符金利
XIAO Haimei;CAI Lei;ZHANG Zhaohui;CHEN Shan;ZHOU Shu;FU Jinli(College of Chemistry and Chemical Engineering,Jishou University,Jishou,Hu'nan 416000,China;Key Laboratory of Mineral Cleaner Production and Exploit of Green Functional Materials in Hu′nan Province,Jishou University,Jishou,Hu′nan 416000,China;State Key Laboratory of Chemo Biosensing and Chemometrics,Hu′nan University,Changsha 410082,China)
出处
《应用化学》
CAS
CSCD
北大核心
2020年第9期1076-1086,共11页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金(21767011,21565014)
湖南省研究生科研创新项目(CX2018B705)
湖南省锰锌钒产业技术协同创新中心项目(2018mzvg006)资助。
