期刊
APPLIED SURFACE SCIENCE
卷 254, 期 22, 页码 7405-7409出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2008.05.341
关键词
nano-crystalline; cerium oxide; surfactant; calcination; mixed solvent
Crystalline cerium oxide nanoparticles have been synthesized by surfactant-mediated precipitation technique in acetone/water mixed solvent system. The cerium nitrate hexahydrate as precursor and nonionic surfactant Tween 80 were taken in acetone/water system and precipitated with ammonia at pH 10. The sample was then calcined for 2 h in the temperature range of 200-800 degrees C and characterized by X-ray diffraction (XRD), FTIR, BET surface area and TEM. It was found from XRD studies that the crystallite size increased with calcination temperature from 3 nm to 13 nm and the surface area was found to be 133 m(2)/g for 400 degrees C calcined sample. The particle size obtained from high-resolution transmission electron microscope (HRTEM) was in the range of 4.5 nm with uniform shape and narrow particle size distribution. The diffraction pattern completely indexed with the cubic fluorite structure of CeO2. The calcined cerium oxide nanoparticles showed strong UV absorption and room temperature photoluminescence (PL). (C) 2008 Elsevier B.V. All rights reserved.
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