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X-ray diffraction and X-ray absorption spectroscopy studies on the chemical transformation and formation of nanoscale LaMnO3.12
Chen X(陈兴); Cai Q(蔡泉); Wang W(王维); Chen ZJ(陈中军); Wu ZH(吴忠华); Wu ZY(吴自玉); Chen, X; Cai, Q; Wang, W; Chen, ZJ; Wu, ZH; Wu, ZY; Feng, CH; Li, QS
2007
发表期刊JOURNAL OF PHYSICAL CHEMISTRY C
卷号111期号:12页码:4512-4518
通讯作者CAS, Synchrotron Radiat Facil, Inst High Energy Phys, Beijing 100049, Peoples R China ; Chinese Acad Sci, Grad Sch, Beijing 100864, Peoples R China ; Beijing Inst Technol, Coll Chem Engn & Mat, Beijing 100081, Peoples R China
文章类型Article
摘要Nanoscale lanthanum manganites (LaMnO3+delta) were prepared with thermal decomposition of precursors derived from hydrothermal synthetic method. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) revealed that the as-prepared sample is composed of nanofilaments in an amorphous form. The as-prepared nanoparticles were hydrothermally treated at 180 degrees C for 12 h and then were annealed at 600, 800, and 900 degrees C for 4 h to form LaMnO3+delta. With increasing annealing temperature, a shape change from filaments to rods to spheres was found, and their diameters increased from 4.5 to 52.9 nm. XRD showed a chemical transformation from La(OH)(3) to LaMnO3+delta. Extended X-ray absorption fine structure (EXAFS) and X-ray absorption near-edge structure (XANES) are used to investigate the change of the of local atomic structure around La/Mn with increasing annealing temperature. Combining the TEM, XRD, XANES and EXAFS results, the La-compound is found to be embedded in an amorphous Mn compound with medium range order. As annealed at different temperature, the chemical transformation process from La(OH)(3) to LaMnO3+delta was discussed. It was the chemical transformation that drives the shape change of these nanomaterials.
学科领域Chemistry; Science & Technology - Other Topics; Materials Science
DOI10.1021/jp0666683
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语种英语
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号WOS:000245084100009
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被引频次:3[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/311005/239981
专题多学科研究中心
实验物理中心
作者单位中国科学院高能物理研究所
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GB/T 7714
Chen X,Cai Q,Wang W,et al. X-ray diffraction and X-ray absorption spectroscopy studies on the chemical transformation and formation of nanoscale LaMnO3.12[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2007,111(12):4512-4518.
APA 陈兴.,蔡泉.,王维.,陈中军.,吴忠华.,...&Li, QS.(2007).X-ray diffraction and X-ray absorption spectroscopy studies on the chemical transformation and formation of nanoscale LaMnO3.12.JOURNAL OF PHYSICAL CHEMISTRY C,111(12),4512-4518.
MLA 陈兴,et al."X-ray diffraction and X-ray absorption spectroscopy studies on the chemical transformation and formation of nanoscale LaMnO3.12".JOURNAL OF PHYSICAL CHEMISTRY C 111.12(2007):4512-4518.
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