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EXAFS study on the local atomic structures around Ce in CeO2 nanoparticles
Wu ZH(吴忠华); Wu, ZH; Guo, L; Li, HJ; Yang, QL; Li, QS; Zhu, HS
2000
发表期刊MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
卷号286期号:1页码:#REF!
通讯作者Wu, ZH (reprint author), Chinese Acad Sci, Inst High Energy Phys, BSRF, POB 918,Bin 2-7, Beijing 100039, Peoples R China.
摘要CeO2 nanoparticles coated by sodium bis(2-ethylhexyl) sulfosuccinite have been prepared by using the microemulsion method. An average particle size of 2-3 nm was revealed by using transmission electron microscopy. X-ray diffraction shows that the CeO2 nanoparticles remain the CaF2-type cubic structures as the bulk crystal. Extended X-ray absorption fine structure technique is used to probe the local atomic structures around the absorber Ce. A double Gaussian model is used to deduce the structural parameters of the first coordination shell. Bulk CeO2 with eight oxygen atoms located at 2.338 Angstrom was used as the reference sample to extract the backscattering amplitude and phase shift of the Ce-O bond. Our EXAFS data suggest that in CeO2 nanoparticles, the oxygen coordination number around Ce has no obvious decrease, but the bond-length of Ce-O is obviously elongated. It is postulated that a surface/core model may be used to describe the local atomic structures in the CeO2 nanoparticles. (C) 2000 Elsevier Science S.A. All rights reserved.
文章类型Article; Proceedings Paper
关键词CeO2 nanoparticles local atomic structure EXAFS
学科领域Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering
DOI10.1016/S0921-5093(00)00631-6
收录类别SCI
WOS类目Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号WOS:000088914700032
引用统计
被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226719
专题多学科研究中心
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GB/T 7714
Wu ZH,Wu, ZH,Guo, L,et al. EXAFS study on the local atomic structures around Ce in CeO2 nanoparticles[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2000,286(1):#REF!.
APA 吴忠华.,Wu, ZH.,Guo, L.,Li, HJ.,Yang, QL.,...&Zhu, HS.(2000).EXAFS study on the local atomic structures around Ce in CeO2 nanoparticles.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,286(1),#REF!.
MLA 吴忠华,et al."EXAFS study on the local atomic structures around Ce in CeO2 nanoparticles".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 286.1(2000):#REF!.
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