Papers by Keyword: Mixed Crystals

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.