Structural Investigation of Catalytically Grown Carbon Nanotubes.

Autor:	Mahajan, Mani, Singh, K., Pandey, O.P.
Předmět:	CARBON nanotubes MICROMETERS GRAPHENE CHEMICAL reduction CARBIDES RAMAN spectra THERMOGRAVIMETRY
Zdroj:	Materials & Manufacturing Processes; 2016, Vol. 31 Issue 8, p989-994, 6p
Abstrakt:	Carbon nanotubes (CNTs) having diameters in the range of 30–50 nm and few micrometers in length were synthesized in one step through a chemical-reduction route under autogenous pressure of H2/CO2. The synthesized materials prepared under different experimental conditions were characterized using different techniques. Results showed that V2O5 used as a catalyst for the nucleation of CNTs become carburized to vanadium carbide (V8C7) and provides a site for growth of CNTs. At high temperature, carbide particles thus formed become encapsulated at the tip of nanotube followed by the growth of CNTs through the tip-growth mechanism. Thermogravimetric analysis results showed that the CNTs obtained after the longer reaction time are more stable at high temperatures. Raman analysis showed a well-ordered graphite structure. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
Externí odkaz:	Zobrazit plný text záznamu Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.