Titanium dioxide (TiO2) nanoparticles were synthesized by a sonochemical method. C12H28O4Ti (Tetraisopropyl titanate), ethanol (C2H5OH), sodium hydroxide (NaOH) and deionized water were used as the initial materials. The output power of the ultrasonic device plays the most important role in the size and morphology of the final products. Sonochemical processes at different sonication power were carried out at synthesis temperature (50 oC) for 1.5 h and then the materials were washed and dried at room temperature for 48 h. To determine the particle size and also evaluate the morphological properties, X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used. TG/DTA analysis was used to for determine the temperature and time of crystallization. From TEM observations the size of titanium dioxide nanoparticles is estimated to be significantly smaller than ~12 to ~30 nm.

Keywords: Sonochemical, Cavitation, Sonication power, Nanoparticles, Titanium dioxide.