Electronic structure of TiO(2) nanotube arrays from X-ray absorption near edge structure studies
文献类型：期刊论文
| 作者 | J. G. Zhou ; H. T. Fang ; J. M. Maley ; M. W. Murphy ; J. Y. P. Ko ; J. N. Cutler ; R. Sammynaiken ; T. K. Sham ; M. Liu ; F. Li |
| 刊名 | Journal of Materials Chemistry
 |
| 出版日期 | 2009 |
| 卷号 | 19期号:37页码:6804-6809 |
| 关键词 | titania nanotubes electrochemical properties carbon nanotubes anode material nanowires xanes intercalation nanoparticles spectra storage |
| ISSN号 | 0959-9428 |
| 中文摘要 | We report an X-ray absorption near edge structure (XANES) investigation of several TiO(2) nanotube arrays, including the as-prepared nanotube arrays from electrochemical anodic oxidation of Ti foil (as-prepared ATNTA), as-prepared nanotube arrays after annealing at 580 degrees C (annealed ATNTA) and annealed ATNTA after electrochemical intercalation with Li (Li-intercalated ATNTA). XANES at the O K-edge and Ti L(3,2) and K edges shows distinctly different spectral features for the as-prepared and the annealed ATNTA, characteristic of amorphous and anatase structures, respectively. Intercalation of Li into annealed ATNTA induces a surprising, yet spectroscopically unmistakable, anatase to rutile transition. XANES at the Li K-edge clearly shows ionic features of Li in ATNTA. The charge relocation from Ti 3d to O 2p at the conduction band in TiO(2) was also observed when Li ions were intercalated into annealed ATNTA albeit no noticeable reduction of Ti(4+) to Ti(3+) was observed. The O K-edge shows a distinctly enhanced feature in the multiple scattering regime, indicating a close to linear O-Li-O arrangement in Li-intercalated ATNTA. These results show bonding changes between Ti and O resulting from the interaction of Li ions in the TiO2 lattices. Such bonding variation has also been supported by X-ray excited optical luminescence (XEOL), which suggests Li(+)-defect interactions. The implications of these results are discussed. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/32620]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | J. G. Zhou,H. T. Fang,J. M. Maley,et al. Electronic structure of TiO(2) nanotube arrays from X-ray absorption near edge structure studies[J]. Journal of Materials Chemistry,2009,19(37):6804-6809. |
| APA | J. G. Zhou.,H. T. Fang.,J. M. Maley.,M. W. Murphy.,J. Y. P. Ko.,...&F. Li.(2009).Electronic structure of TiO(2) nanotube arrays from X-ray absorption near edge structure studies.Journal of Materials Chemistry,19(37),6804-6809. |
| MLA | J. G. Zhou,et al."Electronic structure of TiO(2) nanotube arrays from X-ray absorption near edge structure studies".Journal of Materials Chemistry 19.37(2009):6804-6809. |
入库方式： OAI收割
来源：金属研究所
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