| Electronic structure of TiO2 nanotube arrays from X-ray absorption near edge structure studies | |
| Zhou, J. G.2; Fang, H. T.3; Maley, J. M.4; Murphy, M. W.1; Ko, J. Y. Peter1; Cutler, J. N.2; Sammynaiken, R.4; Sham, T. K.1; Liu, M.5; Li, F.5 | |
| Corresponding Author | Sham, T. K.(tsham@uwo.ca) |
| 2009 | |
| Source Publication | JOURNAL OF MATERIALS CHEMISTRY
 |
| ISSN | 0959-9428 |
| Volume | 19Issue:37Pages:6804-6809 |
| Abstract | We report an X-ray absorption near edge structure (XANES) investigation of several TiO2 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,L-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 TiO2 was also observed when Li ions were intercalated into annealed ATNTA albeit no noticeable reduction of Ti4+ to Ti3+ 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. |
| Funding Organization | NSERC ; CFI ; OIT ; CRC (TKS) ; National Science Foundation of China ; Centre for Chemical Physics at UWO |
| DOI | 10.1039/b909225k |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | NSERC ; CFI ; OIT ; CRC (TKS) ; National Science Foundation of China[5060211] ; National Science Foundation of China[50872026] ; Centre for Chemical Physics at UWO |
| WOS Research Area | Chemistry ; Materials Science |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000269835600020 |
| Publisher | ROYAL SOC CHEMISTRY |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/97222 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Sham, T. K. |
| Affiliation | 1.Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada 2.Univ Saskatchewan, Canadian Light Source Inc, Saskatoon, SK S7N 0X4, Canada 3.Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China 4.Univ Saskatchewan, Saskatchewan Struct Sci Ctr, Saskatoon, SK S7N 0X4, Canada 5.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang, Peoples R China |
| Recommended Citation GB/T 7714 | Zhou, J. G.,Fang, H. T.,Maley, J. M.,et al. Electronic structure of TiO2 nanotube arrays from X-ray absorption near edge structure studies[J]. JOURNAL OF MATERIALS CHEMISTRY,2009,19(37):6804-6809. |
| APA | Zhou, J. G..,Fang, H. T..,Maley, J. M..,Murphy, M. W..,Ko, J. Y. Peter.,...&Li, F..(2009).Electronic structure of TiO2 nanotube arrays from X-ray absorption near edge structure studies.JOURNAL OF MATERIALS CHEMISTRY,19(37),6804-6809. |
| MLA | Zhou, J. G.,et al."Electronic structure of TiO2 nanotube arrays from X-ray absorption near edge structure studies".JOURNAL OF MATERIALS CHEMISTRY 19.37(2009):6804-6809. |
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