摘要
The carbonate precursors with different shapes and sizes were prepared by means of coprecipitation with cerium nitrate as the starting salts, ammonium carbonate as the precipitator and citric acid as the complexing agent and dispersant. Precursors and calcined powders were characterized using TEM, TGA and XRD. The results indicate that the morphology of precursors changes from nanowires to spherical particles with the increase of citric acid. The calcined CeO2 nanoparticle inherits obviously the morphology of precursors. The as-prepared CeO2 has the cubic crystal structure of fluorite, and the crystalline degree of samples increases with the roasting temperature.
