Oxygen Functionalization of Multiwall Carbon Nanotubes by Microwave-Excited Surface-Wave Plasma Treatment
Oxygen Functionalization of Multiwall Carbon Nanotubes by Microwave-Excited Surface-Wave Plasma Treatment
复制标题
微波激发表面波等离子体处理多壁碳纳米管的氧功能化
DOI：
10.1021/jp9012015
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发表时间：
2009-05-07
影响因子：
3.7
通讯作者：
Nagatsu, Masaaki
中科院分区：
文献类型：
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作者：
Chen, Changlun;Liang, Bo;Nagatsu, Masaaki
采用微波激发Ar/O2表面波等离子体（SWP）处理多壁碳纳米管（MWCNTs），在MWCNTs表面引入含氧基团。利用X射线光电子能谱（XPS）和拉曼光谱分析了多壁碳纳米管的原子含量和结构特性随气体流量、处理时间和等离子体功率的变化。基于XPS分析，提出了MWCNT氧化的机理，该机理显示了MWCNT表面如何产生含氧基团，如C−O、C O和O−C O。利用场发射扫描电子显微镜（FE-SEM）观察了多壁碳纳米管的表面形貌。结果表明，Ar/O2等离子体处理使MWCNTs表面氧含量增加，结构性能得到改善，表面缺陷增多，在水溶液中的分散性得到改善。纳米管图案的完整性未被破坏。
In this work, oxygen-containing groups were introduced onto multiwall carbon nanotubes (MWCNTs) by using microwave-excited Ar/O2 surface-wave plasma (SWP) treatment. The changes of the atomic contents and structure properties of MWCNTs as a function of gas flow rate, treatment time, and plasma power were analyzed using X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. A mechanism of MWCNT oxidation was proposed, based on XPS analysis, which showed how oxygen-containing groups, such as C−O, C═O, and O−C═O, were generated on the surfaces of MWCNTs. The surface morphology of MWCNTs was observed by field emission scanning electron microscopy (FE-SEM). The results indicated that Ar/O2 plasma treatment greatly enhanced the content of oxygen, modified structure properties, induced more surface defects, and improved the dispersion of MWCNTs in aqueous solution. The integrity of the nanotube patterns was not damaged.