Abstract
The nanometric mixed crystals of rutile and anatase TiO2 also could be prepared by homogeneous precipitation method using both TiCl4 and TiCl3 as titanium source. The effects of hard point, the ratio of TiCl4 to TiCl3and reaction time on the ratio of nanometer TiO2 mix-crystals and photo catalysis were studied. The prepared samples were also characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and laser diffraction particle size analyzer. The results show that nanometer TiO2 mix-crystal with good photo catalytic activity and storage stability can be obtained under the reaction conditions: The ratio of TiCl4 to TiCl3 is 4 to 1, pH=0.5, normal pressure, 95°C for 6 hours. The prepared nanometer TiO2 mix-crystal consisting of anatase of 63.9 wt.% and rutile of 36.1 wt.% is circle with an average size of 25 nm.
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