The basic research of the large synthesis of single-walled carbon nanotubes using the AC arc discharge

交流电弧放电大规模合成单壁碳纳米管的基础研究

• 批准号: 12650023
• 负责人: OHKOHCHI Masato
• 金额: $ 2.3万
• 依托单位: Meijo University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650023/
• 关键词: single-walled carbon nanotubes; AC arc discharge; high-efficient synthesis; metal catalyst; temperature control; pressure control; flow control; automatic electrode feed; 雰囲気ガス温度制御; 雰囲気ガス流量制御; ヘリウムガス

Carbon nanotube advanced material next generation, since the possibility which the carbon nanotube had is made to be a thing of the actuality, it is not possible and important problem of lacking the establishment of the large manufacture method of carbon nanotube. For the achievement of this problem, the energy which is enormous in the research institute in all over the world for the research and development at present is concentrated.Ever since, various methods have been tried the large manufacturing method of single-walled carbon nanotube (SWNT). We have aimed at the high-efficient generation of SWNT by carbon evaporation using the AC arc discharge. In this method, it has been shown that to efficiently form the SWNT in comparison with DC arc discharge method ever, because the carbon material sediment is not formed in the negative electrode, is possible.This study has been carried out for the purpose of investigating the condition in which generation efficiency of SWNT rises most. Possible carbon atom and molecule are cooled by this evaporation by me helium gas of me circumference, when it disappears graphite rod with metal catalyst in high temperature by iterating current arc, and they combine again, and it becomes a solid. It seems to be one of the controlling factors in which merits and demerits in the time until it changes to the solid from this evaporation influence good or bad of SWNT synthesis efficiency. Then, it repeatedly came using the evaporator which combined me electric furnace which contraposed the electrode which was easy to control temperature gradient of the interval until it becomes SWNT by that it is done how by the evaporation possible carbon atom molecule combining, levelely in respect of the experiment.

碳纳米管是下一代先进材料，既然碳纳米管具有的可能性已经成为现实，那么缺乏大规模碳纳米管制造方法的建立是不可能的重大问题。为了解决这一问题，目前世界各地的研究机构都在集中精力进行研究和开发，此后，各种方法都在尝试大型单壁碳纳米管(SWNT)的制造方法。我们的目标是利用交流弧光放电，通过碳蒸发来高效地产生单壁碳纳米管。在这种方法中，由于碳材料沉积不是在负极中形成的，所以与直流弧光放电方法相比，有效地形成单壁碳纳米管是可能的。本研究的目的是研究单壁碳纳米管的产生效率最高的条件。可能的碳原子和碳分子被周围的氦气蒸发冷却，当它在高温下用金属催化剂通过迭代电流弧使石墨棒消失时，它们再次结合，成为固体。这似乎是影响单壁碳纳米管合成效率优劣的控制因素之一。然后，反复使用与电炉相结合的蒸发器来对抗易于控制区间温度梯度的电极，直到它变成单壁碳纳米管，通过蒸发来做如何可能的碳原子分子结合，就实验而言。