Synthesis and Spectra Characterization of Nano-Sized Ce1-x(Fe0.5La0.5)xO2-δ Solid Solutions
ZHANG Guo-fang1,2, ZHANG Yang-huan1, GE Qi-lu1, ZHANG Yin2, LIU Ling-sheng3, ZHANG Lian-lian2
1. Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, China 2. Rare Earth School, Inner Mongolia University of Science and Technology, Baotou 014010, China 3. Baotou Research Institute of Rare Earths, Baotou 014030, China
Abstract：Ce1-x(Fe0.5La0.5)xO2-δ solid solutions were obtained via hydrothermal method. The structure of the solid solutions and the cell parameters were characterized by XRD analysis technique, the electron transition properties and doping effects were measured by UV-Vis diffraction spectrum and Raman spectrum technique. XRD results showed that Ce1-x(Fe0.5La0.5)xO2-δ solid solutions exhibited cubic fluorite structure till the doping content increased to 0.30. Tiny Fe2O3 phase was observed when x=0.30. The particle size was kept nanoscaled, and location of different kind of doping ions in CeO2 lattice was discussed. By increasing the doping content, the cell parameter was kept increasing gradually till x=0.18, then it remained almost constant. The UV-Vis diffraction spectrum analysis showed that the absorption threshold edge redshifted, the band gap energy decreased with increasing the doping content. The valence of Fe ions in the lattice of CeO2 was +3. The F2g Raman mode also showed a downshift, and the peak gradually became broader, which further proved the influence of the dopant.
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