Room temperature purification of few-walled carbon nanotubes with high yield
Room temperature purification of few-walled carbon nanotubes with high yield
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DOI：
10.1021/nn800388g
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发表时间：
2008-08-01
期刊：
影响因子：
17.1
通讯作者：
Liu, Jie
中科院分区：
文献类型：
--
作者：
Feng, Yiyu;Zhang, Hongbo;Liu, Jie
利用过氧化氢(H_2O_2)在室温下缓慢而选择性地氧化制备高质量的少壁碳纳米管(FWNTs)。用透射电子显微镜、拉曼光谱和热重分析分别对纯化后的碳纳米管的纯度、纳米管结构和热稳定性进行了表征。结果表明，在30wt%H_2O_2溶液中，延长搅拌时间可以选择性地提纯fWNTs。得到了高纯度的fWNTs，拉曼光谱G/D值高，热稳定性好，说明纯化后的fWNTs质量良好。该方法提供了一种简单、低成本的纯化方法，与其他纯化方法相比，该方法具有更高的纳米管产率。
Purification of high-quality few-walled carbon nanotubes (fWNTs) was developed by slow but selective oxidation in hydrogen peroxide (H2O2) at room temperature. The purity, nanotubes' structure, and thermal stability of purified fWNTs were characterized by transmission electron microscopy (TEM), Raman spectroscopy, and thermogravimetric analysis (TGA), respectively. The results showed that fWNTs could be selectively purified by prolonging the stirring time in 30 wt % H2O2 solution. Highly purified fWNTs were obtained, having a high G/D ratio in Raman spectra and good thermal stability indicating the good quality of the purified fWNTs. The approach provides a simple low cost method for purification that also has higher nanotube yield than other purification methods.