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Synthesis and Microstructure of La-Doped Ceria Nanoparticles

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Ce1−xLaxO2−(0 ≤ x ≤ 0.2) nanoparticles have been synthesized by a sol–gel method and a hydrothermal method, respectively. Nanoparticles have been obtained and the optimum synthesis parameters and microstructural characteristics have also been studied. High purity and well-dispersed nanoparticles with a narrow grain size distribution of 10–20 nm have been obtained. Sol–gel method was much more superior than the hydrothermal method in synthesizing particles in small average crystal size. The microstructure characteristics showed that there were (111) and (200) planes with the angle of 53.9 ± 0.8° for Ce0.8La0.2O1.9 and (100) and (101) planes with the angle of 30.85 ± 0.75° for La2O3 in the lattice, respectively. The formation mechanism of the solid solution has been discussed and the maximum percentage of La2O3 in Ce1−xLaxO2−(0 ≤ x ≤ 0.2) solid solution was near to 20 percent.
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Document Type: Research Article

Publication date: 2007-08-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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