- Main
Tracking the Local Effect of Fluorine Self-Doping in Anodic TiO2 Nanotubes
- Author(s): Li, J;
- Liu, C;
- Ye, Y;
- Zhu, J;
- Wang, S;
- Guo, J;
- Sham, TK
- et al.
Published Web Location
https://doi.org/10.1021/acs.jpcc.5b11445Abstract
We report herein a study in which we reveal the role of F- incorporated in the very anodic TiO2 nanotubes prepared electrochemically from a Ti foil using a fluoride based electrolyte. X-ray absorption near edge structure (XANES), resonant X-ray emission spectroscopy (RXES), and X-ray photoelectron spectroscopy (XPS) have been used to examine the as-prepared and the annealed TiO2 nanotubes. It is found that the additional electron resulting from the substitution of O2- by self-doped F- in the TiO2 lattice is localized in the t2g state. Consequently, a localized Ti3+ state can be tracked by a d-d energy loss peak with a constant energy of 1.6 eV in the RXES, in contrast to TiO2 nanostructures where this peak is hardly noticeable when F- is driven out of the lattice upon annealing.
Main Content
Enter the password to open this PDF file:
-
-
-
-
-
-
-
-
-
-
-
-
-
-