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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
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume286Issue:1Pages:#REF!
Corresponding AuthorWu, ZH (reprint author), Chinese Acad Sci, Inst High Energy Phys, BSRF, POB 918,Bin 2-7, Beijing 100039, Peoples R China.
SubtypeArticle; Proceedings Paper
AbstractCeO2 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.
KeywordCeO2 nanoparticles local atomic structure EXAFS
Subject AreaScience & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering
DOI10.1016/S0921-5093(00)00631-6
Indexed BySCI
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000088914700032
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Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/226719
Collection多学科研究中心
Recommended Citation
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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