Abstract:

 CeO₂ nanocrystals were successfully synthesized via a simple alcohol-water solvothermal method using PVP as a capping agent and Ce(NO3)3·6H2O as a precursor. The shape and size of the products could be effectively tuned by controlling the reaction conditions, such as reaction time and the molar ratio of Ce3+to PVP. Xray diffraction analysis showed that the phase of the particles was CeO2 of cubic system, and their structures and size were characterized by SEM and TEM. The results of photoluminescence (PL) spectra showed that the fluorescence peak corresponds to different luminescence centers, and the fluorescence of Eu3+∶CeO2 nanomaterials have excellent photoluminescence.

Key words:  solvothermal, CeO₂ nanocrystals, photoluminescence