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以多壁碳纳米管(MWCNTs)为基质、壳聚糖(CS)为功能单体、Ni(Ⅱ)离子为模板、戊二醛为交联剂,采用静电自组装法制备了镍离子印迹材料MIIPs。采用SEM、XRD、FTIR及TG对其结构和性能进行了表征,采用丁二酮肟可见分光光度法对印迹聚合物的吸附性能进行了考察。结果表明;壳聚糖成功地接枝到碳纳米管表面,并且印迹材料对Ni(Ⅱ)具有选择吸附性能,化学吸附过程符合准二级吸附动力学模型,平衡吸附量为32.20mg/g,竞争离子Pb(Ⅱ)和Cu(Ⅱ)存在时,Ni(Ⅱ)/Pb(Ⅱ)和Ni(Ⅱ)/Cu(Ⅱ)的选择系数分别为11.27和9.22。
Using MWCNTs as matrix, chitosan (CS) as functional monomer, Ni (Ⅱ) as template and glutaraldehyde as crosslinking agent, nickel ion imprinting material MIIPs. The structure and properties of the polymers were characterized by SEM, XRD, FTIR and TG. The adsorption properties of the imprinted polymers were investigated by dimethylglyoxime visible spectrophotometry. The results showed that chitosan was successfully grafted onto the surface of carbon nanotubes, and the imprinted material had selective adsorption on Ni (Ⅱ). The chemisorption process was in accordance with quasi-second order kinetic model. The equilibrium adsorption capacity was 32.20mg / g, The selectivity coefficients of Ni (Ⅱ) / Pb (Ⅱ) and Ni (Ⅱ) / Cu (Ⅱ) were 11.27 and 9.22 in the presence of competitive ions Pb (Ⅱ) and Cu (Ⅱ) respectively.