Anti Perkson

Carbon nanostructures produced by chlorinating aluminium carbide

A number of carbon samples with different nanostructures such as: amorphous, nanoparticles and turbostratic, were synthesised through the reaction between aluminium carbide and gaseous chlorine at fixed temperatures between 300 and 900°C. The synthesised carbon samples were characterised using high-resolution transmission electron microscopy and X-ray powder diffraction techniques, as well as low temperature nitrogen sorption measurements. The carbon produced at T=300°C was amorphous with a surface area of ∼1400 m2 g−1. At 700°C, a large amount of carbon nanoparticles and with a lower surface area ∼710 m2 g−1 was obtained. At 900°C, mainly a turbostratic carbon with a surface area of ∼680 m2 g−1 was produced.

Catalytic effects of metals of the iron subgroup on the chlorination of titanium carbide to form nanostructural carbon

Abstract The effect of the reaction temperature and the metals of an iron subgroup on the thermo–chemical treatment of titanium carbide with a chlorine gas and their influence on the carbon structure obtained thereby was studied. Different analytical methods such as porosity measurements, X-ray diffraction spectrometry and a high-resolution electron microscopy revealed the catalytic behaviour of the above-mentioned metals, which appeared to support the formation of graphitised carbon at much lower temperatures compared to those needed for the ordinary thermo–chemical chlorination of titanium carbide.

Barrel-like carbon nanoparticles from carbide by catalyst assisted chlorination

Abstract The nanostructure of carbon materials synthesised via chlorination of various metal and metalloid carbides and their mixtures has been investigated by low-temperature nitrogen sorption, X-ray powder diffraction and high-resolution electron microscopy techniques. The carbon nanostructure and its crystallinity are strongly affected by transition metal catalysts and synthesis temperature. A clear relationship between carbon nanostructure formation and catalysts concentration revealed that only very low concentration (approximately 1 mg per gram of carbide) of Cobalt (Ni, Fe) in reaction medium supports the conversation of Al4C3 to nanobarrel-like carbon nanoparticles.