Synthesis of Anatase-Based Titania Nanostructures Using Extreme Hydrothermal Conditions

TiO2 nanostructures with a pure anatase phase were successfully synthesized using hydrothermal treatment of P25-TiO2 nanoparticles. These nanostructures were characterized using transmission electron microscopy (TEM) and x-ray powder diffraction measurements. The dependences of reaction temperature and calcination temperature on titanate-anatase phase transformation and the morphology of TiO2 nanostructures were also discussed. The results demonstrated that phase composition and particle morphology can be controlled by both the reaction and calcination temperatures.