Hydrothermal Synthesis and Characterization of CeO2:Eu3+ Nanopowders
CeO2 :Eu3+ powders(6mol%) were successfully prepared via the precursor,which were synthesizedby a hydrothermal method.The precursor was calcined from 500 to 800°C and CeO2:Eu3+ powders were obtained.XRD analysis showed that the powders with pure cubic fluorite-type CeO2 phase was obtained at the calcination temperatures from 500 to 800°C.TG analysis showed the precursor is no weight loss when the calcination temperature is higher than 500°C. SEM indicated CeO2:Eu3+ powders were polygonal crystal.The PL measurements indicated the dependence of PL emission intensity on the calcination temperature．The excitation spectra of the CeO2：Eu3+ powders were dominated by a broad band at 300-390 nm，suggesting the efficient energy transfer from the O2-_Ce4+ charge-transfer state to the doping Eu3+ in the CeO2:Eu3+ powders. The CeO2:Eu3+ powders with a 6at.% concentration of Eu sintered at 800°C revealed the strongest photoluminescence .
Yansheng Yin and Xin Wang
M. Zhou et al., "Hydrothermal Synthesis and Characterization of CeO2:Eu3+ Nanopowders", Advanced Materials Research, Vols. 79-82, pp. 597-600, 2009