| 纳米CeO2粉体发光性能的研究 |
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| 引用本文： | 邹云玲,李酽,郭英,刘秀林,才华,栗建钢.纳米CeO2粉体发光性能的研究[J].辽宁师范大学学报(自然科学版),2009,32(2):212-214. |
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| 作者姓名： | 邹云玲 李酽 郭英 刘秀林 才华 栗建钢 |
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| 作者单位： | 中国民航大学,南院,理学院,天津,300300 |
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| 基金项目： | 天津市自然科学基金，中国民航大学科研启动基金 |
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| 摘 要： | 采用草酸沉淀法制备了纳米CeO2粉体，通过XRD、TEM等测试手段对其进行了结构表征和形貌分析；应用荧光光谱法对样品的发光性能进行了测试；探讨了纳米CeO2粉体的发光机理以及热处理温度对其发光性能的影响．结果表明，实验所得的纳米CeO2为立方萤石结构，其颗粒尺寸约为20-30nm，形貌接近于球形．纳米CeO2粉体具有良好的紫蓝色发光性能，主要是Ce4f→O2p跃迁和缺陷能级→O2p跃迁共同作用的结果，其发光强度随热处理温度的升高而增强．
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| 关 键 词： | 草酸沉淀法 纳米CeO2 发光 |
Study on the photoluminescence of nano-CeO2 |
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| ZOU Yun-ling,LI Yan,GUO Ying,LIU Xiu-lin,CAI Hua,LI Jian-gang.Study on the photoluminescence of nano-CeO2[J].Journal of Liaoning Normal University(Natural Science Edition),2009,32(2):212-214. |
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| Authors: | ZOU Yun-ling LI Yan GUO Ying LIU Xiu-lin CAI Hua LI Jian-gang |
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| Institution: | (Collage of Science, Civil Aviation University of China, Tianjin 300300, China) |
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| Abstract: | The nano-CeO2 powder was prepared by oxalic acid precipitation method. X-ray diffraction and Transmission electron microscopy were utilized to characterize the morphology and structure of the sample. The photoluminescence properties of nano-CeO2 were investigated by fluorescence spectrometer. The luminescence mechanism and the influences of sintered temperature on photoluminescence properties of nano-CeO2 were investigated. The results showed that a cubic fluorite-type CeO2 phase with spherical shape was obtained. The size of prepared particles varies from 20 nm to 30 nm. The nano-CeO2 has good violet/blue emission properties. The emission might be due to both of charge transfer from the Ce 4f to the valence band of O 2p and from oxygen defects band to the valence band of O 2p. The emission intensity strengthened with the sintered temperature increase. |
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| Keywords: | oxalic acid precipitation method nanocrystalline Ceria photoluminescence |
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