Controlled synthesis of carbon nanoparticles by arc in water method with forced convective jet
Controlled synthesis of carbon nanoparticles by arc in water method with forced convective jet
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DOI：
10.1063/1.1756216
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发表时间：
2004-06
影响因子：
3.2
通讯作者：
N. Sano;T. Charinpanitkul;T. Kanki;W. Tanthapanichakoon
中科院分区：
文献类型：
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作者：
N. Sano;T. Charinpanitkul;T. Kanki;W. Tanthapanichakoon
碳弧等离子体表面的强制对流射流对“水中电弧”法制备的多壁碳纳米管与多壳纳米颗粒混合的碳纳米颗粒（CNPs）的形成有重要影响。对流射流存在一个优化的流速，该流速导致最高的生产产率、最大的产品流体动力学直径和减少的结晶缺陷。当对流流速为1.36 dm 3/min时，CNPs的产率和产率最高，分别为48.5%和9.32 g/h。强制对流射流的这些效应源于石墨阳极汽化碳团簇的淬灭增强。通过对电弧等离子体区对流场的分析，表明水弧法合成纳米碳颗粒是一种精细可控的合成方法。
Forced convective jet applied onto carbon arc plasma has significant effects on the formation of carbon nanoparticles (CNPs) containing multiwalled carbon nanotubes mixed with multishelled nanoparticles produced by the “arc in water” method. There is an optimized flow rate of the convective jet that leads to the highest production yield, largest hydrodynamic diameter of the products, and the reduced crystalline defects. With the convective flow rate of 1.36 dm3/min, the highest yield and production rate of CNPs could be obtained at 48.5% and 9.32 g/h, respectively. These effects of the forced convective jet originate from the enhanced quenching of carbon clusters vaporized from graphite anode. Analysis of convective flow field subjected to the arc plasma zone is conducted to indicate that synthesis of CNPs by the arc in water method can be elaborately controlled.