Analyzing the purity of carbon nanotubes by using different methods
Analyzing the purity of carbon nanotubes by using different methods
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DOI：
10.3938/jkps.52.1382
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发表时间：
2008-05-01
影响因子：
0.6
通讯作者：
Phan Ngoc Minh
中科院分区：
文献类型：
--
作者：
Noo Thi Thanh Tam;Nguyen Xuan Nghia;Phan Ngoc Minh
采用X射线衍射、拉曼光谱、热重分析和能量色散X射线荧光光谱等方法对碳纳米管的纯度进行了评价。采用X射线衍射、拉曼光谱和热重分析对杂质进行定性评价，并采用能量色散X射线荧光光谱进行定量测定。对于具有不同纯度的CNT样品，评价从这些技术获得的纯度的所有实验结果彼此一致。碳纳米管样品的纯度被发现大大增加时，他们在空气中或在真空中退火。讨论了Si、晶态碳、非晶态碳和Fe、Ni组分的贡献。
The purity of carbon nanotubes (CNTs) was evaluated by using a variety of methods: X-ray diffraction, Raman spectroscopy, thermogravimetric analysis and energy dispersive X-ray fluorescence spectroscopy. X-ray diffraction, Raman spectroscopy and thermogravimetric analysis were used for a qualitative evaluation of impurities and energy dispersive X-ray fluorescence spectroscopy was utilized for a quantitative determination. All experimental results evaluating the purity obtained from these techniques are consistent with each other for CNT samples with different degrees of purity. The purity of the CNT samples was found to be greatly increased when they were annealed in air or in vacuum. The contributions of Si-related, crystalline carbon, non-crystalline carbon and Fe and Ni components are discussed.