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XAFS study on the local atomic structures of cerium-oxide nanoparticles with surface coatings
Wu ZH(吴忠华); Zhang J(张静); Chen X(陈兴); Chen ZJ(陈中军); Sun MH(孙民华); Wu ZY(吴自玉); Wu, ZH; Zhang, J; Chen, X; Chen, ZJ; Sun, MH; Wu, ZY; Guo, L
2005
发表期刊PHYSICA SCRIPTA
卷号T115页码:802-806
通讯作者[Wu, Zhonghua ; Zhang, Jing ; Chen, Xing ; Chen, Zhongjun ; Sun, Minhua ; Wu, Ziyu] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Lab, Beijing 100039, Peoples R China ; [Guo, Lin] Beijing Univ Aeronaut & Astronaut, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
摘要Four kinds of cerium oxide nanoparticles coated, respectively, with Sodium bis(2-ethylhexyl) sulfosuccinate (AOT), cetyltrimethyl ammonium bromide (CTAB), poly vinyl pyrrolidone (PVP) and those (naked) without surface coating were prepared using chemical method. The particle sizes were identified to be 2 similar to 3 nm by using transmission electron microscope (TEM) and X-ray diffraction (XRD). Mixed valences of Ce3+ and Ce4+ were detected by X-ray absorption near-edge-structure (XANES) spectra. Extended X-ray absorption. ne structure (EXAFS) spectra of Ce L-3-edge were fitted with a core-shell model. The core parts are almost the same as bulk CeO2 with Ce4+ characteristic, however their shell parts change with surface coatings. The local atomic structures at shell parts (surface) and the contents and thicknesses of the shell parts were evaluated. The averaged Ce-O bond lengths at surface are changed from 2.504 angstrom (AOT), 2.568 angstrom (PVP), 2.628 angstrom (CTAB) to 2.634 angstrom (naked). The contents of surface are changed from 49% (AOT), 15% (PVP), 19% (CTAB) to 15% (naked). The results demonstrate that surface coatings have different influences on the surfaces of cerium oxide nanoparticles. A detailed discussion is given in this paper.
文章类型Article
学科领域Physics
研究领域[WOS]Physics
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语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000204272100240
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被引频次:2[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/311005/238519
专题多学科研究中心
作者单位中国科学院高能物理研究所
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Wu ZH,Zhang J,Chen X,et al. XAFS study on the local atomic structures of cerium-oxide nanoparticles with surface coatings[J]. PHYSICA SCRIPTA,2005,T115:802-806.
APA 吴忠华.,张静.,陈兴.,陈中军.,孙民华.,...&Guo, L.(2005).XAFS study on the local atomic structures of cerium-oxide nanoparticles with surface coatings.PHYSICA SCRIPTA,T115,802-806.
MLA 吴忠华,et al."XAFS study on the local atomic structures of cerium-oxide nanoparticles with surface coatings".PHYSICA SCRIPTA T115(2005):802-806.
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