Use of polymer-free calixarene nanofibers in heavy metal extractions

F. Ozcan, Ş. Ertul
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Abstract

Polymer free calix[4]arene nanofibers were prepared via new electrospinning method with metal ion adsorption capacity. Two different calix[4]arene derivatives (compound 2 and 3) containing amide functionalities were used in this study, which were fully characterized by HNMR, FTIR and elemental analysis. Calix[4]arene nanofibers were analyzed with different surface characterization techniques such as SEM, TEM and AFM. SEM images of compound 2 and 3 nanofibers reveals there are non-bonded randomly grown fibers with average fiber diameter (AFD) was in the range of 237 to 307 nm for compoud 2 and 203–280 nm for compound. Adsorption study show the SEM-EDX mapping show adsorption of different metal ions (Hg+2, Pb+2, Cu+2, Co+2, Cd+2, Ni+2) on nanofibers. The the adsorption study show Hg+2, Pb+2 and Cu+2 adsorbed on nanofibers particularly at high pH. The maximum adsorption (98 %) was observed at pH 2 for Hg+2.
无聚合物杯芳烃纳米纤维在重金属提取中的应用
采用新型静电纺丝法制备了具有金属离子吸附能力的无聚合物杯[4]芳烃纳米纤维。本研究使用了两种不同的含有酰胺官能团的杯[4]芳烃衍生物(化合物2和3),并通过HNMR、FTIR和元素分析对其进行了充分的表征。采用扫描电镜(SEM)、透射电镜(TEM)和原子力显微镜(AFM)等不同的表面表征技术对杯[4]芳烃纳米纤维进行了分析。化合物2和3纳米纤维的SEM图像显示,化合物2的平均纤维直径(AFD)为237 ~ 307 nm,化合物3的平均纤维直径(AFD)为203 ~ 280 nm。纳米纤维对不同金属离子(Hg+2, Pb+2, Cu+2, Co+2, Cd+2, Ni+2)的吸附研究表明,SEM-EDX图谱显示纳米纤维对不同金属离子(Hg+2, Pb+2, Cu+2, Co+2, Cd+2, Ni+2)的吸附。纳米纤维对Hg+2、Pb+2和Cu+2的吸附研究表明,在高pH条件下,纳米纤维对Hg+2、Pb+2和Cu+2的吸附效果较好,pH为2时,Hg+2的吸附量达到98%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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