Metal-free synthesis of carbon nanotubes filled with calcium silicate

A new metal-free catalyst CaSiO3 was developed to grow carbon nanotubes (CNTs) on a pyrolytic graphite paper tape by an ethanol catalytic chemical vapor deposition method at 1200–1400°C. The prepared CNTs with a droplet tip had a multi-walled structure and were filled with amorphous CaSiO3. Temperat...

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Bibliographic Details
Published in:Carbon (New York) 2012-06, Vol.50 (7), p.2666-2669
Main Authors: Zhu, Jiangtao, Jia, Juncai, Kwong, Fung-luen, Ng, Dickon H.L., Crozier, Peter A.
Format: Article
Language:English
Subjects:
Calcium silicates
Carbon
Carbon nanotubes
Catalysis
Catalysts
Chemistry
Cross-disciplinary physics: materials science
rheology
Droplets
Ethyl alcohol
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
General and physical chemistry
Materials science
Melting
Physics
Specific materials
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Transition metals
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Summary:A new metal-free catalyst CaSiO3 was developed to grow carbon nanotubes (CNTs) on a pyrolytic graphite paper tape by an ethanol catalytic chemical vapor deposition method at 1200–1400°C. The prepared CNTs with a droplet tip had a multi-walled structure and were filled with amorphous CaSiO3. Temperature, determining the melting of CaSiO3, was critical for the growth of the CNTs. This new catalyst is suggested to follow the similar roles of transition metals in the growth of CNTs by a molten state to absorb carbon and form CNTs after reaching saturation.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2012.01.071