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利用微波引诱燃烧法合成了纳米Ce1-xLaxO2-δ(x=0-0.25)复合氧化物。X射线衍射和Raman光谱结果表明所合成的Ce1-xLaxO2-δ纳米颗粒具有与体相CeO2一样的氟化物结构。TEM(透射电镜)图像证明合成样品具有类盘状的网络结构,FE-SEM(场发射扫描电镜)说明Ce1-xLaxO2-δ固溶体具有多孔形态。在400nm以下所有的样品对紫外-可见光都具有较强的吸收,同时分别在208和352nm(5.97,3.53eV)处出现吸收极值。利用254nm的氙激光为激发源,样品Ce0.85La0.15O2-δ在378nm处具有较强的发射峰。
Nanocrystalline Ce1-xLaxO2-δ (x = 0-0.25) composite oxides were synthesized by microwave entrapment combustion. X-ray diffraction and Raman spectroscopy results show that the synthesized Ce1-xLaxO2-δ nanoparticles have the same fluoride structure as the bulk phase CeO2. TEM (Transmission Electron Microscopy) images demonstrate that the synthesized samples have a plate-like network structure and the FE-SEM (field emission scanning electron microscope) shows that the Ce1-xLaxO2-δ solid solution has a porous morphology. All samples below 400 nm showed a strong absorption in the UV-Vis range, with an absorption maximum at 208 and 352 nm (5.97, 3.53 eV), respectively. Using 254nm xenon laser as the excitation source, the sample Ce0.85La0.15O2-δ has a strong emission peak at 378nm.