| 纳米Ce1-xLaxO2-δ的微波引诱燃烧合成及其性能表征 |
| Microwave-induced Combustion Synthesis and Characterizations of Nanometer Ce1-xLaxO2-δ |
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| 摘要: |
| 关键词: Ce1-xLaxO2-δ 微波引诱燃烧 合成 表征 |
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| Abstract: Nanometer Ce1-xLaxO2-δ solid solutions were synthesized by microwave-induced combustion process us-ing cerium nitrate hexahydrate， lanthanum nitrate hexahydrate and urea as raw materials. The process took only six minutes to obtain La2O3-doped CeO2 nanopowders. The nanopowders were characterized by XRD， Laser Raman spectrum ， UV-Vis spectroscopy，field-emission scanning electron micrograph(FE-SEM)and TEM. The results revealed that the grain size of Ce1-xLaxO2-δ varied from 20 to 40 nm calculated by Scherer formula through the plane of (111)， that oxygen vacancy was produced in the crystal lattices and the concentration of oxygen vacancy was increased with La doping， therefore the covalence of Ce-O bond was strenthened， which results in more intensive UV-C(200～280 nm)absorption. It can be seen from SEM that the porous appearance was obtained. Grain size is no more than 40nm observed from TEM. |
| Keywords: Ce1-xLaxO2-δ microwave-induced combustion synthesis characterization |
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| 郝仕油.纳米Ce1-xLaxO2-δ的微波引诱燃烧合成及其性能表征[J].无机化学学报,2007,23(8):1477-1480. |
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