交流电弧放电法制备多壁碳纳米管

K. Singh, S. Chaudhary, R. Venugopal, A. Gaurav
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引用次数: 12

摘要

本研究提出了用不同形状的光谱纯石墨电极(即可移动的圆柱形电极和固定的矩形电极)通过手工金属弧焊装置进行交流放电制备多壁碳纳米管的方法。通过在电极之间保持约3mm的间隙产生连续电弧,从而形成等离子体区。碳阳离子蒸发后的突然猝灭为碳纳米管的形成铺平了道路。制备的纳米管以烟尘的形式沉积在固定的石墨电极上。进一步从煤烟中提取纳米粒子是通过进行一系列的净化过程进行的,这将在接下来的章节中讨论。采用x射线衍射、扫描电镜、场发射扫描电镜、透射电镜和拉曼光谱对提取的纳米管进行形貌和纯度分析。在表征过程中,观察到所制得的纳米管具有不同的形状,即碳锥纳米管、纳米胶囊、纳米颗粒、分支型和随机取向。纳米管的长度在231 ~ 561 nm之间,而直径在14 ~ 55 nm之间。
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Bulk synthesis of multi-walled carbon nanotubes by AC arc discharge method
This work proposes the production of multi-walled carbon nanotubes by AC arc discharging of spectroscopically pure graphite electrodes of different shapes, that is, movable cylindrical and stationary rectangular electrode by manual metal arc welding setup. Continuous arc was generated by maintaining the gap of about 3 mm between the electrodes which in turn formed the plasma zone. Vaporization of carbon cations followed by sudden quenching paved the way for formation of carbon nantotubes. Nanotubes produced were deposited on the stationary graphite electrode in the form of soot. Further extraction of the nanoparticles from the soot was performed by conducting series of purification processes which will be discussed in upcoming chapters. Morphology and purity of the extracted nanotubes were investigated by X-ray diffraction, scanning electron microscopy, field-emission scanning electron microscopy, transmission electron microscopy and Raman spectroscopy. Following the characterization process, it was observed that the so-produced nanotubes were of different shapes, that is, carbon cone nanotubes, nanocapsules, nanoparticles and branching type and randomly oriented. The length of the nanotubes varied from 231 to 561 nm, whereas diameter was found to be in the range of 14–55 nm.
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来源期刊
CiteScore
6.00
自引率
1.70%
发文量
24
期刊介绍: Proceedings of the Institution of Mechanical Engineers Part N-Journal of Nanomaterials Nanoengineering and Nanosystems is a peer-reviewed scientific journal published since 2004 by SAGE Publications on behalf of the Institution of Mechanical Engineers. The journal focuses on research in the field of nanoengineering, nanoscience and nanotechnology and aims to publish high quality academic papers in this field. In addition, the journal is indexed in several reputable academic databases and abstracting services, including Scopus, Compendex, and CSA's Advanced Polymers Abstracts, Composites Industry Abstracts, and Earthquake Engineering Abstracts.
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