Electronic structure of TiO2 nanotube arrays from X-ray absorption near edge structure studies

doi:10.1039/b909225k

IMR OpenIR

	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. Peter 1; Cutler, J. N.2; Sammynaiken, R.4; Sham, T. K.1; Liu, M.5; Li, F.5
通讯作者	Sham, T. K.(tsham@uwo.ca)
	2009
发表期刊	JOURNAL OF MATERIALS CHEMISTRY
ISSN	0959-9428
卷号	19 期号:37 页码:6804-6809
摘要	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.
资助者	NSERC ; CFI ; OIT ; CRC (TKS) ; National Science Foundation of China ; Centre for Chemical Physics at UWO
DOI	10.1039/b909225k
收录类别	SCI
语种	英语
资助项目	NSERC ; CFI ; OIT ; CRC (TKS) ; National Science Foundation of China[5060211] ; National Science Foundation of China[50872026] ; Centre for Chemical Physics at UWO
WOS研究方向	Chemistry ; Materials Science
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary
WOS记录号	WOS:000269835600020
出版者	ROYAL SOC CHEMISTRY
引用统计	被引频次：68[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/97222
专题	中国科学院金属研究所
通讯作者	Sham, T. K.
作者单位	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
推荐引用方式 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.