X-ray diffraction and X-ray absorption spectroscopy studies on the chemical transformation and formation of nanoscale LaMnO3.12
文献类型：期刊论文
| 作者 | 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
|
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| 出版日期 | 2007 |
| 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 |
| 英文摘要 | 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. |
| 学科主题 | Chemistry; Science & Technology - Other Topics; Materials Science |
| 类目[WOS] | Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| 研究领域[WOS] | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000245084100009 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/239981]  |
| 专题 | 高能物理研究所_实验物理中心 高能物理研究所_多学科研究中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。