TiO2 particles, rods, flowers and sheets were prepared by hydrothermal method via adjusting the temperature, the pressure and the concentration of TiCl4. The as-prepared TiO2 powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectra and N2 adsorption-desorption measurements. It was found that pressure is the most important factor influencing the morphology of TiO2. The photocatalytic activity of the products was evaluated by the photodegradation of...
