Kinetics Transformation of Anatase to Rutile Phase for Titanium Dioxide Nanoparticles Prepared by Sol-Gel Method

摘要

Simple sol-gel route was used to synthesis the TiO_2 nanoparticles and examined by X-ray diffraction (XRD). The small particle size and uniform morphology of the TiO_2 were found at different calcination temperatures. The kinetic study of phase changes from the anatase to rutile using the X-ray diffraction data with Avrami equation was investigated. The transformation of anatase to rutile was started after 500 °C and above by decreasing of XRD peaks intensity of anatase with rutile increased. The activation energy of the rutile phase was found lower which indicated that uniform shape and morphology of TiO_2 nanoparticles. At same time, changes of activation energy value depended on the experimental conditions was observed.