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Li insertion in sol-gel prepared Mn-doped TiO2 studied by electron spectroscopy in ultrahigh vacuum

Richter, J. H.; Karlsson, P. G.; Westin, G.; Blomquist, Jakob LU ; Uvdal, Per LU ; Siegbahn, H. and Sandell, A. (2007) In Journal of Physical Chemistry C 111(8). p.3459-3466
Abstract
The properties of a sol-gel prepared Mn-modified TiO2 film have been studied with X-ray absorption spectroscopy (XAS) and photoelectron spectroscopy (PES) using synchrotron radiation. The chemical composition and oxidation state of the elements have been determined. The manganese content estimated by PES of the Mn-modified film is about 10% and both Mn2+ and Mn3+ are observed. Addition of Mn is found to modify the valence band edge. The Mn 3d states are found to extend about 1 eV into the TiO2 band gap region. It is demonstrated that lithium insertion into the sol-gel film can be performed in a stepwise fashion in situ under ultrahigh vacuum (UHV) conditions. Lithium is distributed evenly throughout the entire film and leads to reduction... (More)
The properties of a sol-gel prepared Mn-modified TiO2 film have been studied with X-ray absorption spectroscopy (XAS) and photoelectron spectroscopy (PES) using synchrotron radiation. The chemical composition and oxidation state of the elements have been determined. The manganese content estimated by PES of the Mn-modified film is about 10% and both Mn2+ and Mn3+ are observed. Addition of Mn is found to modify the valence band edge. The Mn 3d states are found to extend about 1 eV into the TiO2 band gap region. It is demonstrated that lithium insertion into the sol-gel film can be performed in a stepwise fashion in situ under ultrahigh vacuum (UHV) conditions. Lithium is distributed evenly throughout the entire film and leads to reduction of Mn3+ to Mn2+ followed by reduction of Ti4+ to Ti3+. The XAS and PES measurements give fully consistent results regarding the amount of inserted lithium. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physical Chemistry C
volume
111
issue
8
pages
3459 - 3466
publisher
The American Chemical Society
external identifiers
  • wos:000245005900037
  • scopus:33947387118
ISSN
1932-7447
DOI
10.1021/jp066192n
language
English
LU publication?
yes
id
69cd35a7-19ea-41ec-9eab-53936106d7f5 (old id 670081)
date added to LUP
2007-12-18 11:14:24
date last changed
2017-01-01 04:36:53
@article{69cd35a7-19ea-41ec-9eab-53936106d7f5,
  abstract     = {The properties of a sol-gel prepared Mn-modified TiO2 film have been studied with X-ray absorption spectroscopy (XAS) and photoelectron spectroscopy (PES) using synchrotron radiation. The chemical composition and oxidation state of the elements have been determined. The manganese content estimated by PES of the Mn-modified film is about 10% and both Mn2+ and Mn3+ are observed. Addition of Mn is found to modify the valence band edge. The Mn 3d states are found to extend about 1 eV into the TiO2 band gap region. It is demonstrated that lithium insertion into the sol-gel film can be performed in a stepwise fashion in situ under ultrahigh vacuum (UHV) conditions. Lithium is distributed evenly throughout the entire film and leads to reduction of Mn3+ to Mn2+ followed by reduction of Ti4+ to Ti3+. The XAS and PES measurements give fully consistent results regarding the amount of inserted lithium.},
  author       = {Richter, J. H. and Karlsson, P. G. and Westin, G. and Blomquist, Jakob and Uvdal, Per and Siegbahn, H. and Sandell, A.},
  issn         = {1932-7447},
  language     = {eng},
  number       = {8},
  pages        = {3459--3466},
  publisher    = {The American Chemical Society},
  series       = {Journal of Physical Chemistry C},
  title        = {Li insertion in sol-gel prepared Mn-doped TiO2 studied by electron spectroscopy in ultrahigh vacuum},
  url          = {http://dx.doi.org/10.1021/jp066192n},
  volume       = {111},
  year         = {2007},
}