Structure and dehydration of layered perovskite niobate with bilayer hydrates prepared by exfoliation/self-assembly process
文献类型：期刊论文
| 作者 | Chen, YF ; Zhao, XH ; Ma, H ; Ma, SL ; Huang, GL ; Makita, YJ ; Bai, XD ; Yang, XJ |
| 刊名 | JOURNAL OF SOLID STATE CHEMISTRY
 |
| 出版日期 | 2008 |
| 卷号 | 181期号:7页码:1684 |
| 关键词 | MANGANESE OXIDE THIN-FILMS ION-EXCHANGE HYBRID FILMS NANOSHEETS NIOBIUM DELAMINATION KCA2NB3O10 PRECURSOR SUPERCONDUCTIVITY |
| ISSN号 | 0022-4596 |
| 通讯作者 | Yang, XJ (reprint author), Beijing Normal Univ, Coll Chem, Beijing 100875, Peoples R China. |
| 中文摘要 | The crystals of an H-form niobate of HCa2Nb3O10 center dot xH(2)O (x = 0.5) being tetragonal symmetry (space group P4/mbm) with unit cell parameters a= 5.4521(6) and c 14.414(2) angstrom were exfoliated into nanosheets with the triple-layered perovskite structure. The colloid suspension of the nanosheets was Put into dialysis membrane tubing and allowed self-assembly in a dilute KCl solution. By this method, a novel layered K-form mobate KCa2Nb3O10 center dot xH(2)O (x = 1.3, typically) with bilayer hydrates in the interlayer was produced. The Rieveld refinement and transmission electron microscope (TEM)/selected-area electron diffraction (SAED) observation indicated that the orientations of the a-/b-axis of each nanosheet as well as the c-axis are uniform, and the self-assembled compound had the same symmetry, tetragonal (P4/mbm) with a = 5.453(2) and c 16.876(5)angstrom, as the H-form precursor; the extoliation/ self-assembly process does not markedly affect the two-dimensional lattice of the layer. The large basal spacing resulted from the interlayer K+ ions solvated by two layers of water molecules. The interlayer bilayers-water was gradually changed to monolayer when the temperatures higher than 100 degrees C, and all the water molecules lost when over 600 degrees C. Accompanying the dehydration, the crystal structure transformed from tetragonal to orthorhombic symmetry. Water molecules may take an important role for the layer layered compound to adjust the unit cell to tetragonal symmetry. (C) 2008 Elsevier Inc. All rights reserved. |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [20671012]; Post-doctor Science Foundation of China [20070410470] |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/53425]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Chen, YF,Zhao, XH,Ma, H,et al. Structure and dehydration of layered perovskite niobate with bilayer hydrates prepared by exfoliation/self-assembly process[J]. JOURNAL OF SOLID STATE CHEMISTRY,2008,181(7):1684. |
| APA | Chen, YF.,Zhao, XH.,Ma, H.,Ma, SL.,Huang, GL.,...&Yang, XJ.(2008).Structure and dehydration of layered perovskite niobate with bilayer hydrates prepared by exfoliation/self-assembly process.JOURNAL OF SOLID STATE CHEMISTRY,181(7),1684. |
| MLA | Chen, YF,et al."Structure and dehydration of layered perovskite niobate with bilayer hydrates prepared by exfoliation/self-assembly process".JOURNAL OF SOLID STATE CHEMISTRY 181.7(2008):1684. |
入库方式： OAI收割
来源：物理研究所
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