One-dimensional alpha-MnO2: Trapping chemistry of tunnel structures, structural stability, and magnetic transitions
文献类型：期刊论文
| 作者 | L. P. Li ; Y. Z. Pan ; L. J. Chen ; G. S. Li |
| 刊名 | Journal of Solid State Chemistry
 |
| 出版日期 | 2007-10 |
| 卷号 | 180期号:10页码:2896-2904 |
| 关键词 | nanorods alpha-MnO2 structure stability magnetic transitions synthesis octahedral molecular-sieves manganese oxide mno2 growth batteries nanorods dioxide route phase |
| ISSN号 | 0022-4596 |
| 中文摘要 | Highly crystalline one-dirnensional (1D) alpha-MnO2 nanostructures were synthesized by a hydrothermal method. All samples were characterized by X-ray diffraction, transmission electron microscope, thermogravimetric and differential scanning calorimeter, and infrared spectroscopy. During the formation reactions, the tunnel structure of 1D alpha-MnO2 was simultaneously modified by NH4+ species and water molecules. The amount of NH4+ species that were trapped in the tunnels is almost independent on the reaction temperature, while the total water content increased with the reaction temperature. The average diameter of alpha-MnO2 nanorods increased from 9.2 to 16.5 nm when the reaction temperature increased from 140 to 220 degrees C. 1D alpha-MnO2 was destabilized by a subsequent high-temperature treatment in air. which is accompanied by a structural transformation to 1D Mn2O3 of a cubic structure. At low temperatures, all 1D alpha-MnO2 nanorods showed two magnetic transitions that were characterized by a decreased Neel temperature with rod diameter reduction. According to the effective magnetic moments experimentally measured, Mn ions presented in the nanorods were determined to be in a mixed valency of high spin state Mn4+/Mn3+. (C) 2007 Elsevier Inc. All rights reserved. |
| 语种 | 英语 |
| 公开日期 | 2013-04-01 |
| 源URL | [http://ir.fjirsm.ac.cn/handle/350002/6393]  |
| 专题 | 福建物质结构研究所_中科院福建物质结构研究所_期刊论文 |
| 推荐引用方式 GB/T 7714 | L. P. Li,Y. Z. Pan,L. J. Chen,et al. One-dimensional alpha-MnO2: Trapping chemistry of tunnel structures, structural stability, and magnetic transitions[J]. Journal of Solid State Chemistry,2007,180(10):2896-2904. |
| APA | L. P. Li,Y. Z. Pan,L. J. Chen,&G. S. Li.(2007).One-dimensional alpha-MnO2: Trapping chemistry of tunnel structures, structural stability, and magnetic transitions.Journal of Solid State Chemistry,180(10),2896-2904. |
| MLA | L. P. Li,et al."One-dimensional alpha-MnO2: Trapping chemistry of tunnel structures, structural stability, and magnetic transitions".Journal of Solid State Chemistry 180.10(2007):2896-2904. |
入库方式： OAI收割
来源：福建物质结构研究所
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。