Paper Title:
Precursor to High Purity Carbon Nanotubes: A Step by Step Evaluation of Carbon Yield
  Abstract

Yield of carbon nanotubes (CNTs) depends on numerous process parameters such as temperature of synthesis, type of catalyst, type of precursor, time of precursor flow and partial pressure of precursor gas as well as carrier gas, etc. Experiments were performed in order to find the optimum temperature of synthesis for varying time of precursor flow. The yield was evaluated in terms of mass of crystalline CNTs per gram of substrate and/or catalyst. The CNTs were grown on a calcium carbonate (CaCO3) substrate, with iron-cobalt (Fe-Co) as a catalyst, using acetylene (C2H2) as a precursor gas and argon (Ar) as a carrier gas. A three-stage purification process, incorporating two acid treatment steps and one annealing step, was used for purification which ensures high grade purity of CNTs. The highest yield of 21.4 g of CNTs per g of catalyst was achieved at 700oC for 60 min of synthesis. The CNTs were characterized by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), Raman, Thermo-gravimetric analysis (TGA), and Gas chromatography (GC).

  Info
Periodical
Pages
75-87
DOI
10.4028/www.scientific.net/JNanoR.6.75
Citation
K.N. Patil, C. S. Solanki, "Precursor to High Purity Carbon Nanotubes: A Step by Step Evaluation of Carbon Yield", Journal of Nano Research, Vol. 6, pp. 75-87, 2009
Online since
June 2009
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jae Won Kim, Seoung Soo Lee, Dong Ho Park, Yeon Gil Jung, Je Hyun Lee, Chang Yong Jo
Abstract:Silicon carbide (SiC) microtubes with villus-like morphology have been successfully fabricated through a reaction between carbon fiber and...
220
Authors: Bao Min Sun, Yuan Chao Liu, Zhao Yong Ding
Abstract:Carbon nanotube is a new kind of carbon material. Synthesis of carbon nanotubes from V-type pyrolysis flame is a kind of novel technique. It...
104
Authors: Zhao Yong Ding, Bao Min Sun, Yong Hong Guo, Bin Jia, Jin Sheng Bi
Abstract:Pyramid sharp pyrolysis flame is a new method for carbon nanotubes synthesis. Oxy-acetylene flame outside the frustum of pyramid sharp...
572
Authors: Qian Zhang, Li Feng Dong
Chapter 9: Nano Materials
Abstract:A series of techniques, including field emission scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction,...
1364
Authors: Lei Shan Chen
Chapter 2: Applications of Materials in Manufacturing Technologies, Materials Science and Engineering
Abstract:Carbon nanotubes based on anodic aluminum nano-templates embedded with different metal catalysts were synthesized and the influence on the...
534