Effect of arc current on characteristics of nanocarbons prepared by cryogenic arc discharge method

다국어 초록 (Multilingual Abstract)

A variety of nanocarbons (nanohorns, nanoflowers and nanoclusters) could be prepared by arc discharge in cryogenic nitrogen with either graphite–graphite or iron–graphite electrodes manipulated by a strategy of automatic electrode delivering. Based on local thermal equilibrium assumption, magnetohydrodynamic equations were taken into account for estimating the arc power efficiency of 60–84%,depending on the electrode combination. The effects of arc current on the morphology and yield of nanocarbons were investigated within a range of 75–150 A. Transmission electronmicroscopic analyses revealed that the synthesized product consisted of single-walled carbon nanohorns and multi-walled carbon nanoflowers with nominal diameters of 100–200 nm when graphite–graphite electrodes were employed but nanoclusters containing Fe nanoparticles inside carbon nanoshells with smaller size of 70–120 nm were mainly synthesized by iron–graphite electrodes subject to arc discharge in cryogenic nitrogen.
2010 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

참고문헌 (Reference)

1 H.W. Zhu, 366 : 664-, 2002

2 V.A. Karachevtsev, 44 : 1292-, 2006

3 S. Cui, 42 : 931-, 2004

4 N. Sano, 88 : 235-, 2004

5 N. Sano, 96 : 645-, 2004

6 T. Charinpanitkul, 44 : 324-, 2009

7 D. Nishide, 392 : 309-, 2004

8 N. Sano, 41 : 2159-, 2003

9 H. Lange, 41 : 1617-, 2003

10 G. Xing, 22 : 337-, 2007

11 T. Iwao, 83 : 34-, 2009

12 E. Bekyarova, 366 : 463-, 2002

13 N. Sano, 368 : 331-, 2003

14 M.V. Antisari, 41 : 2393-, 2003

15 Y. Yildiz, 48 : 947-, 2008

16 Pramote Puengjinda, "Selective synthesis of carbon nanotubes and nanocapsules using naphthalene pyrolysis assisted with ferrocene" 한국공업화학회 15 (15): 375-380, 2009

17 S.V. Patankar, "Numerical Heat Transfer and Fluid Flow" Hemisphere Publ 1980

18 T. Charinpanitkul, "Carbon nanostructures synthesized by arc discharge between carbon and iron electrodes in liquid nitrogen" 한국물리학회 9 (9): 629-632, 2009