Diameter-selective purification of carbon nanotubes by microwave-assisted acid processing
Diameter-selective purification of carbon nanotubes by microwave-assisted acid processing
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微波辅助酸处理直径选择性纯化碳纳米管
DOI：
10.1016/j.seppur.2012.06.001
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发表时间：
2012-08
影响因子：
8.6
通讯作者：
Yang Junhe
中科院分区：
文献类型：
--
作者：
Qiu Hanxun;Maeda Yutaka;Akasaka Takeshi;Yang Junhe
采用微波辐射和混合酸辅助分散相结合的方法制备了直径分布较窄的单壁碳纳米管。使用该方法，除了去除常规杂质之外，优先消除具有高度化学反应性的小单壁碳纳米管和具有更多拓扑缺陷的大双壁碳纳米管的外层，仅保留直径分布显著变窄的纯单壁碳纳米管。所得材料的化学结构通过拉曼光谱和电子显微镜进行。结果表明，该技术不仅对纯化碳纳米管，而且特别是对缩小碳纳米管是非常有效的。纯化和直径分布变窄的双重效果使得该方法有希望获得特定类型的高纯度单壁CNT。对该技术的净化机理进行了详细的讨论。
Narrowly diameter-distributed single-walled carbon nanotubes (SWCNTs) were purely achieved by a facile technique combining microwave irradiation with mixed acid-assisted dispersion. Using this process, besides removal of conventional impurities, both small SWCNTs with highly chemical reactivity and the outer layers of large double-walled carbon nanotubes with more topological defects were preferentially eliminated, retaining only pure SWCNTs of which the diameter distribution was significantly narrowed. The chemical structure of resulting materials was carried by Raman spectroscopy, and electron microscopies. Results revealed that the technique employed is of great efficacy not only for purifying carbon nanotubes, but also especially for narrowing carbon nanotubes. The dual effects of purifying and diameter distribution narrowing make this method promising for achieving high purity single-walled CNTs of specific types. The purification mechanism of the present technique was discussed in detail.
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通讯作者：
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影响因子：
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