Nano-titanium dioxide synthesis using gaseous detonation

TiO2 nanoparticles are prepared by detonation method in gas phase. In this experiment, titanium tetrachloride is used as a precursor, and premixed gas (O2 and H2) as energy. Properties of TiO2 ultrafine particles were studied by means of XRD, SEM and TEM. The results show that the powders which are globose are rutile and anatase phase, and particle sizes of the powders are within 10 and 20 nm. There are also some larger particles which are about 100 nm. It is found that the production of larger particles is contributed to the deflagration-to-detonation course and the turbulent of detonation to grow. In the paper, the property of particles synthesized under the over-H2 and over-O2 case were compared. The result showed that the morphology of particles produced by the two cases does not vary greatly.