磁性碳纳米管表面新型镉离子印迹聚合物制备及其对大米中的镉离子富集

doi:10.11944/j.issn.1000-0518.2015.11.150154

摘要/Abstract

摘要：

以苯胺修饰的磁性碳纳米管为基质,Cd²⁺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,在碳纳米管表面制备出一种新型磁性Cd²⁺印迹聚合物(MWNTs/MIIPs)。采用扫描电子显微镜和红外光谱等技术手段对其形态和化学结构等进行详细表征。吸附试验结果表明,该磁性印迹材料对Cd²⁺离子具有良好的吸附能力,最大吸附量为16.96 mg/g;选择吸附试验结果表明,该磁性印迹材料对Cd²⁺/Cu²⁺、Cd²⁺/Ni²⁺、Cd²⁺/Pb²⁺和Cd²⁺/Cr³⁺的相对选择因子分别是2.03、2.35、2.16和2.13。结合原子吸收光谱分析技术,该材料MWNTs/MIIPs可用于大米中的Cd²⁺快速分离富集检测。

关键词: 离子印迹, 磁性, 碳纳米管, 镉离子

Abstract:

A novel magnetic ion imprinted polymers(MWNTs/MIIPs) based on aniline functionalized multi-walled carbon nanotubes was synthesized using Cd²⁺ 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 and infrared spectroscopy in detail. Adsorption studies indicate that the MWNTs/MIIPs show excellent adsorption and selective recognition ability towards Cd²⁺ with a maximum adsorption capacity of 16.96 mg/g. And the selectivity factor of the MWNTs/MIIPs toward Cd²⁺/Cu²⁺, Cd²⁺/Ni²⁺, Cd²⁺/Pb²⁺and Cd²⁺/Cr³⁺ is 2.03, 2.35, 2.16 and 2.13, respectively. Combined with atomic absorption spectral analysis technology, the MWNTs/MIIPs were applied for the rapid separation and enrichment of trace Cd²⁺ in rice.

Key words: ion imprinted, magnetic, carbon nanotubes, cadmium ion

黄水波,张朝晖,周必武,赵承峰. 磁性碳纳米管表面新型镉离子印迹聚合物制备及其对大米中的镉离子富集[J]. 应用化学, 2015, 32(11): 1299-1306.

HUANG Shuibo,ZHANG Zhaohui,ZHOU Biwu,ZHAO Chengfeng. Synthesis of Novel Magnetic Cadmium(Ⅱ) Ion Imprinted Polymers Based on Carbon Nanotubes for Enrichment of Cadmium Ion in Rice[J]. Chinese Journal of Applied Chemistry, 2015, 32(11): 1299-1306.

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