Document Type : Research Paper
Department of Physics, Varamin-Pishva Branch, Islamis Azad University, Varamin, Iran
Department of Physics, Varamin Pishva Branch, Islamis Azad University, Varamin, Iran
Nano-sized titanium dioxide TiO2 powder was successfully prepared from its precursor titanium (IV) chloride by a simple and new wet chemical method. TiCl4 were used as precursor in hydrogen peroxide, H2O2 and ethanol. This solution was then peptized using nitric acid and heated under reflux at 80°C. Their physico-chemical properties were then characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM) and X-Ray diffraction (XRD). The TEM results showed that the size of as-synthesized TiO2 nanoparticles were in the range of 7-10 nm. The SEM images showed that the size of nanoparticles increased when the nanoparticles prepared in presence of nitric acid. The SEM images showed that the quality of annealed TiO2 nanoaprticles, increased when the nanoparticles synthesized without nitric acid. The crystal structure of the nanoparticles before and after annealing was done by XRD analysis. It was realized that the rutile phase was formed after heat treatment at 600°C. XRD pattern also showed that the size of annealed TiO2 nanoparticles increased from 20 to 50 nm when the nanoparticles prepared with nitric acid.