METHOD OF PREPARING CARBON-DOPED TITANIUM DIOXIDE NANOPARTICLES BY DECOMPOSITING CARBON DIOXIDE USING THERMAL PLASMA

摘要

Disclosed is a method of preparing carbon-doped titanium dioxide nanoparticles by decomposing carbon dioxide using thermal plasma, including injecting carbon dioxide and titanium tetrachloride into a reaction tube of a thermal plasma jet system, decomposing the injected carbon dioxide by a thermal plasma jet generated using argon, so that it reacts with titanium tetrachloride transferred by a carrier gas, thus producing carbon-doped titanium dioxide, and cooling the carbon-doped titanium dioxide, thus preparing carbon-doped titanium dioxide nanoparticles. This method decomposes carbon dioxide within a short time thus reducing global warming and showing high decomposition efficiency, and does not need post-treatment thanks to the use of thermal plasma having high temperature and high activity, without concern about the production of secondary pollutants. The carbon-doped anatase titanium dioxide having a size of 20-50 nm exhibits superior photocatalytic activity in the UV/visible range, with a high specific surface area, and thus is efficiently employed as a photocatalyst.