磁性碳纳米管表面铅离子印迹聚合物的制备及应用  

Synthesis and Application of Novel Magnetic Lead (Ⅱ) Ion Imprinted Polymers Based on Multiwalled Carbon Nanotubes

作　　者：陈星[1,2] 杨朝霞[2] 张朝晖[1,2,3] 饶维[2] 刘玉楠[2] 陈红军[2] 胡晓云[2] 蔡蓉[2] 聂利华[3] 

机构地区：[1]吉首大学湖南省林产化工重点实验室,张家界427000 [2]吉首大学化学化工学院,吉首416000 [3]湖南大学化学生物传感与计量国家重点实验室,长沙410082

出　　处：《分析化学》2013年第9期1406-1412,共7页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(Nos.21005030;21267010);湖南省创新团队计划;湖南省重点学科(No.JSU0713Z31);吉首大学校级科研项目(No.Jdy12039)资助

摘　　要：以乙烯基修饰的磁性碳纳米管为基质,Pb2+为模板,甲基丙烯酸为功能单体,乙二醇二甲基丙烯酸酯为交联剂,制备出一种对Pb2+具有特异吸附能力的新型磁性印迹聚合物(MWNTs/MIIPs)。采用扫描电镜、红外光谱和振动样品磁强计等技术并对该印迹聚合物的形态、化学结构和性能进行表征。吸附实验结果表明,所制备的MWNTs/MIIPs对Pb2+具有良好的吸附和选择识别能力,最大吸附量为25.9 mg/g;选择吸附实验结果表明,Pb2+/Cu2+,Pb2+/Zn2+,Pb2+/Co2+,Pb2+/Mg2+,Pb2+/Cd2+以及Pb2+/Ni2+的选择因子分别是2.3,2.5,2.1,2.2,2.1和2.4。结合原子吸收光谱分析技术,此MWNTs/MIIPs成功应用于实际样品中微量Pb2+的分离富集,富集倍数可达40.5倍。Novel magnetic ion imprinted polymers based on vinyl-functionlized multiwalled carbon nanotubes（MWNTs@MIIPs） with highly selective adsorption toward Pb2＋ were synthesized using Pb2＋ as the template,methacrylic acid as the functional monomer and ethylene glycol dimethacrylate as the cross-linker.The MWNTs@MIIPs were characterized by scanning electron microscopy,Fourier-transform infrared analysis and vibrating sample magnetometer analysis.Adsorption studies demonstrated that the MWNTs@MIIPs possessed excellent adsorption and selective recognition ability towards Pb2＋ with a maximum capacity of 25.9 mg/g.And the selectivity factor of MWNTs@MIIPs towards Pb2＋/Cu2＋,Pb2＋/Zn2＋ Pb2＋/Co2＋,Pb2＋/Mg2＋,Pb2＋/Cd2＋and Pb2＋/Ni2＋ was 2.3,2.5,2.1,2.2,2.1 and 2.4,respectively.Combined with atomic absorption spectrometric analysis technology,the MWNTs@MIIPs were successfully applied for separation and enrichment trace Pb2＋ in environmental real samples with the enrichment factor of 40.5.

关 键 词：离子印迹 磁性 碳纳米管 铅离子 

分 类 号：O631.3[理学—高分子化学] O658.2[理学—化学]