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Synthesis of bamboo–structured multiwalled carbon nanotubes by spray pyrolysis method, using a mixture of benzene and pyridine

P. NEMES-INCZE1,* , N. DARÓCZI2, Z. SÁRKÖZI1, A.A. KOÓS3, K. KERTÉSZ3, O. ŢIPRIGAN1, Z. E. HORVÁTH3, AL. DARABONT1, L. P. BIRÓ3

Affiliation

  1. Babeş–Bolyai University, Fac. of Physics, 400084 M. Kogălniceanu str., nr. 1, Cluj–Napoca, Romania
  2. Babeş–Bolyai University, Fac. of Chemistry, 400028 Arany János str., nr. 11, Cluj–Napoca, Romania
  3. Research Institute for Technical Physics and Materials Science – MFA, Hungarian Academy of Sciences, Konkoly Thege str. 29-33, Budapest, H-1121 Hungary

Abstract

Spray pyrolysis is one of the most widely used methods for carbon nanotube synthesis. This is mainly because of its scalability and the low cost of the carbon nanotubes produced. In our synthesis experiments, multiwalled carbon nanotubes (MWCNT) are formed by spraying a solution of ferrocene-liquid hydrocarbon into a quartz reactor, heated to a temperature of around 800oC, with the aid of Ar gas. The most suitable carbon sources are found to be benzene and its derivatives (toluene, xylene). In our current paper we report, how this simple method can be used, to produce MWCNTs with bamboo structure, as evidenced by TEM and HRTEM measurements. Bamboo-structured MWCNTs are obtained by adding pyridine to the ferrocene-benzene solution. We have studied the effect of pyridine concentration on the ratio and morphology of the bamboo MWCNTs in the obtained samples. Such bamboo-shaped nanotubes are known to contain nitrogen incorporated into their structure. The nitrogen doping has an important effect on the physical properties of carbon nanotubes. Potential applications of doped nanotubes include gas sensors, nanoscale emitters and nanoelectronic devices..

Keywords

Carbon nanotubes, TEM, HRTEM, CVD, Pyridine.

Submitted at: Nov. 14, 2006
Accepted at: May 15, 2007

Citation

P. NEMES-INCZE, N. DARÓCZI, Z. SÁRKÖZI, A.A. KOÓS, K. KERTÉSZ, O. ŢIPRIGAN, Z. E. HORVÁTH, AL. DARABONT, L. P. BIRÓ, Synthesis of bamboo–structured multiwalled carbon nanotubes by spray pyrolysis method, using a mixture of benzene and pyridine, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 5, pp. 1525-1529 (2007)