Abstract
This work shows that nanocrystalline titanium dioxide (TiO2) particles are directly synthesized in an atmospheric microwave plasma-torch, using gas-phase titanium tetrachloride (TiCl4), O2, and H2 as reactants. The as-synthesized samples were characterized by employing scanning electron microscope (SEM), transmission electron microscope (TEM), and X-ray diffractometer (XRD). The ratio of anatase and rutile depended strongly on the flow rate of H2 injected into the microwave plasma-torch, showing the maximum anatase fraction of 94% at the flow rate of 30 sccm H2 for the range of O2 flow rate.
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