Multi-method analysis of functionalized single-walled carbon nanotubes for cesium liquid-solid extraction
Multi-method analysis of functionalized single-walled carbon nanotubes for cesium liquid-solid extraction
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DOI：
10.1016/j.matchemphys.2014.04.021
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发表时间：
2014-09-15
影响因子：
4.6
通讯作者：
Grandjean, Agnes
中科院分区：
文献类型：
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作者：
Kaper, Helena;Nicolle, Jimmy;Grandjean, Agnes
我们报告了一个详细的分析单壁碳纳米管（SWCNTs）功能化与二甲基乙炔二羧酸（DMAD）使用大量的技术，涉及不同的光谱分析，透射电子显微镜，热重分析，和X-射线衍射。单壁碳纳米管功能化是基于一个简单的协议相关联的超声处理和适度加热下的内源性压力的分子被接枝。所得接枝单壁碳纳米管的完整和仔细的表征表明，实现了每纳米管长度超过1个分子的接枝率。此外，一个原始的量化的接枝均匀性开发使用显微拉曼映射技术。Cs+离子到接枝单壁碳纳米管上的吸附实验导致高负载容量，即每克接枝碳纳米管约250 mg Cs+，从而为基于碳纳米管的材料的液体处理应用的设计打开了令人兴奋的机会。(C)2014爱思唯尔有限公司版权所有。
We report a detailed analysis of single-walled carbon nanotubes (SWCNTs) functionalized with Dimethyl Acetylenedicarboxylate (DMAD) using a large range of techniques, involving different spectroscopic analysis, transmission electron microscopy, thermogravimetric analysis, and X-ray diffraction. SWCNT functionalization is based on a simple protocol associating ultrasonication and moderate heating under endogenous pressure of the molecules to be grafted. The complete and careful characterization of the resulting grafted SWCNTs revealed that a grafting rate of more than 1 molecule per nanometer of tube length is achieved. Furthermore an original quantification of the grafting homogeneity is developed using the micro-Raman mapping technique. Sorption experiments of Cs+ ions onto grafted SWCNTs resulted in a high loading capacity, i.e. about 250 mg of Cs+ per gram of grafted carbon nanotubes, opening exciting opportunities towards the design of carbon nanotube based materials for liquid treatment applications. (C) 2014 Elsevier B.V. All rights reserved.