Characterization of Nanocrystalline Titanium Dioxide prepared by precipitation of aqueous TiCl4 solution

Titanium dioxide nanoparticles were prepared by precipitation of aqueous TiCl4 solution with ammonium hydroxide as precipitation agent. Freshly prepared Titania gel is allowed to crystallize under refluxing and stirring condition for 6 h over 90 o C and oven dried over night in temperature above 100 o C. X-ray diffraction studies on oven dried powder indicate formation of anatase phase TiO2 with average crystalline size of 4.5 nm. Powders with variable amount of anatase and rutile phase were prepared by calcination of pure anatase in the temperature range 400-1000 o C for 4 h. the XRD patterns show that phase transition from anatase to rutile occur in calcination above 600 o C. The morphology and microstructure characteristics were obtained by XRD, TEM, and TGA.

Keywords:

Anatase , Calcination , Rutile , Morphology