Effect of metal oxide and oxygen on the growth of single-walled carbon nanotubes by electric arc discharge

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• 作者：Delong He ; Yongning Liu ; Tingkai Zhao ; Jiewu Zhu and Guang Yu
• 关键词：Carbon nanotubes ; SWCNT ; Synthesis ; Amorphous nanoparticle ; Electric arc discharge ; Oxygen
• 刊名：Journal of Nanoparticle Research
• 出版年：2008
• 出版时间：March, 2008
• 年：2008
• 卷：10
• 期：3
• 页码：409-414
• 全文大小：363.4 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Nanotechnology
  Inorganic Chemistry
  Characterization and Evaluation Materials
  Physical Chemistry
  Applied Optics, Optoelectronics and Optical Devices
  
• 出版者：Springer Netherlands
• ISSN：1572-896X

文摘

The effect of oxygen on the growth of single-walled carbon nanotubes was studied with Ni–Co alloy powder as catalyst under helium atmosphere of 500 Torr by electric arc discharge. The oxygen included in nickel or (and) cobalt oxides was added in catalyst. The content of oxygen in atmosphere was controlled by changing vacuum degree inside furnace before inputting buffer gas. The examinations of TEM and Raman scattering showed that oxygen in metal oxide as catalyst promotes the nucleation of SWCNT by taking effect on the metal catalyst particles. However, O₂ in atmosphere has the role of oxidizing amorphous particles along with nanotubes. When its molar proportion is higher than 0.22 ppm (Parts per million), the carbon nanotubes produced are oxidized and their purity decreases. The diameter of single-walled carbon nanotube obtained under different condition has a narrow distribution around 1.28 nm.