The effect of TiCl₄ concentration on the phase transformations among the TiO₂ polymorphs was studied using in situ powder X-ray diffraction and Raman spectroscopy. Interestingly, the primarily amorphous TiO₂ solid obtained after thermolysis of TiCl₄ at 80°C contained some anatase and rutile phases for low (≤18 mM) and high (≥27 mM) TiCl₄ concentrations, respectively. These samples produced anatase or rutile dominated samples of TiO₂ after hydrothermal treatment. The tricrystalline TiO₂ sample fabricated with 18 mM TiCl₄ solution showed the highest photocatalytic activity for the degradation of phenol, as a result of high surface area.

利用原位粉末X射线衍射和拉曼光谱研究了TiCl ₄浓度对TiO ₂多晶型物之间相变的影响。有趣的是，TiCl ₄在80°C下热分解后获得的主要为非晶态TiO ₂固体分别含有一些锐钛矿和金红石相，分别用于低（≤18 mM）和高（≥27 mM）的TiCl ₄浓度。在水热处理之后，这些样品产生了锐钛矿或金红石为主的TiO ₂样品。用18 mM TiCl ₄制备的三晶TiO ₂样品 由于高表面积，溶液对苯酚的降解显示出最高的光催化活性。