South African Journal of Science
On-line version ISSN 1996-7489
NDUNGU, P. et al. Carbon-nanostructured materials for energy generation and storage applications. S. Afr. j. sci. [online]. 2009, vol.105, n.7-8, pp. 270-275. ISSN 1996-7489.
We have developed and refined a chemical vapour deposition method to synthesise nanotubes using liquid petroleum gas as the carbon source. The nanotubes were thoroughly characterised by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and thermogravimetric analysis. The protocol to grow nanotubes was then adapted to deposit nanotubes on the surface of different substrates, which were chosen based upon how the substrates could be applied in various hydrogen energy conversion systems. Carbon nanotubes are a nanostructured material with an extremely wide range of applications in various energy applications. The methods outlined demonstrate the complete development of carbon nanotube composite materials with direct applications in hydrogen energy generation, storage and conversion.
Keywords : chemical vapour deposition; carbon nanotubes; consolidated nanomaterials; LPG; iron-titanium alloys; hydrogen storage.