Studying of influence of precursors on structure and phase composition of nanosized CeO <sub>2</sub> synthesed by sol-gel method
The synthesis of nanosized CeO 2 was performed by sol-gel method. Studying of structure and phase composition of the obtained samples was carried out with X-ray diffraction and IR-spectroscopy. Studies have shown that obtained ceria nanoparticles having face-centered cubic crystal structure. The crystallinity of the samples increased with increasing temperature of calcination. IR spectroscopy showed the presence of chemically and physically bounded water in samples dried at a temperature below 250 ° C. Desorption of the bounded water and the decomposition of cerium hydroxide take place during drying at temperatures above 250 ° C. The dependence of the particle size of the precursor used was investigated.