SYNTHESIS AND CHARACTER OF CERIUM OXIDE (CeO2) NANOPARTICLES BY THE PRECIPITATION METHOD

Y. H. Liu, J. C. Zuo, X. F. Ren, College of Material Science and Engineering, Shenyang Ligong University, Shenyang,Liaoning, China. L. YONG, School of Material and Metallurgy, Northeastern University, Liaoning, Liaoning, China In this paper cerium oxide (CeO2) nanoparticles with 200-300 nm in diameter were synthesized via a precipitation method using ammonia water and oxalic acid as precipitant, respectively. The as-prepared CeO2 nanoparticles were characterized by means of diff erent techniques including X-ray, scanning electron microscopy and FT-IR. The eff ect of calcine temperature and precipitant on the crystal size and morphology were discussed. The results showed that the shape of CeO2 nanoparticles prepared is strongly dependent on the precipitant. The average particle size as well as the crystallite size increased with increasing the calcine temperature. The structure of the nanoparticles was fl uorite-type structure in the samples.