Synthesis of carbon nanostructures on iron nanopowders

3rd International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures (Saint Petersburg OPEN 2016)

Koshanova, A.^1,2 ; Partizan, G.^1,2 ; Mansurov, B.^2 ; Medyanova, B.^1,2 ; Mansurova, M.^2 ; Aliev, B.^1 ; Jiang, Xin^3

Al-Farabi Kazakh National University, Almaty

050040, Kazakhstan^1

Institute of Combustion Problems, Almaty

050012, Kazakhstan^2

Institute of Materials Engineering, University of Siegen, Siegen

57076, Germany^3

关键词: Carbon Nanostructures;    Electrical explosion;    High quality;    Lower temperature limits;    Nano powders;    Nucleation and growth;    Optimum conditions;    Thermal chemical vapor deposition;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/741/1/012017/pdf
DOI  :  10.1088/1742-6596/741/1/012017

来源: IOP

【 摘 要 】

This work presents the results of experiments on synthesis of carbon nanostructures (CNs) by the method of thermal chemical vapor deposition using iron nanopowders obtained by the method of electrical explosion of wires as catalysts. To study the process of nucleation and growth of individual carbon nanostructures, experiments were conducted not only on nanopowders, but also on the separated clusters. To determine the optimum conditions of the carbon nanostructures synthesis and lower temperature limit, experiments were performed at different temperatures (300-700°C) and pressures (100-400 mbar). The experiments have shown that the lower temperature limit for carbon nanostructures synthesis on the iron nanopowders is 350°C and in this process the growth of carbon nanostructures is not so massive. Stable growth of carbon nanostructures for nanopowders began from 400°C during the entire range of pressures. The analysis of Raman spectroscopy showed that the most optimum conditions for obtaining nanotubes of high quality are P = 100 mbar and T = 425°C.