Journal ArticleDOI
Electron energy loss and X-ray absorption spectroscopy of rutile and anatase: a test of structural sensitivity
TLDR
In this paper, the electron energy loss and X-ray absorption spectra of two phases of titanium dioxide-rutile and anatase-were reported, and the authors proposed an interpretation of the Ti L2.3 edge, notably for the presence of a previously unobserved splitting on the L3 edge.Abstract:
The electron energy loss and X-ray absorption spectra of two phases of titanium dioxide-rutile and anatase-are reported. Although the nearest-neighbour environments of titanium and oxygen in both these structures are very similar, noticeable differences are observed between the electron energy loss and the X-ray absorption spectra. Attempts to model these differences using real-space multiple-scattering calculations are reasonably successful at the Ti K and O K edges. The authors propose an interpretation of the Ti L2.3 edge, notably for the presence of a previously unobserved splitting on the L3 edge.read more
Citations
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Titanium Dioxide Nanomaterials: Synthesis, Properties, Modifications, and Applications
Xiaobo Chen,Samuel S. Mao +1 more
Journal ArticleDOI
Electronic-Structure of Anatase Tio2 Oxide
TL;DR: In this paper, the experimental density of states (DOS) was found to be in agreement with the theoretical DOS reported in the literature for anatase crystals, and shows some characteristics similar to the experimental DOS reported for rutile crystals.
Journal ArticleDOI
Size effects in the Raman spectra of TiO2 nanoparticles
TL;DR: In this paper, the authors investigated the relationship between the particle size and the Raman bands of TiO 2 nanoparticles using transmission electron microscopy (TEM), X-ray absorption near edge structure (XANES), extended Xray absorption fine structure (EXAFS), and Raman spectroscopy.
Journal ArticleDOI
A Review of Photocatalysis using Self-organized TiO2 Nanotubes and Other Ordered Oxide Nanostructures
TL;DR: The present Review focuses on TiO(2) nanotube arrays (and similar structures) that grow by self-organizing electrochemistry from a Ti metal substrate, as well as ways and means to modify critical tube properties.
Journal ArticleDOI
Assignment of pre‐edge peaks in K‐edge x‐ray absorption spectra of 3d transition metal compounds: electric dipole or quadrupole?
TL;DR: In this article, the authors reviewed the characteristics of pre-edge peaks in K-edge x-ray absorption near edge structure (XANES) spectra of 3d transition metals from viewpoints of the selection rule, coordination number, number of d-electrons, and symmetry of the coordination sphere.
References
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Journal ArticleDOI
Stability of Polyatomic Molecules in Degenerate Electronic States. I. Orbital Degeneracy
H. A. Jahn,Edward Teller +1 more
TL;DR: In this paper, it was shown that if the total electronic state of orbital and spin motion is degenerate, then a non-linear configuration of the molecule will be unstable unless the degeneracy is the special twofold one (discussed by Kramers 1930) which can occur only when the molecule contains an odd number of electrons.
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Study of the L 23 edges in the 3 d transition metals and their oxides by electron-energy-loss spectroscopy with comparisons to theory
TL;DR: In this article, a variation from the statistical white-line intensity ratio of 2:1 has been observed across the $3d$ transition row, with values ranging between 0.8:1 for Ti to 5: 1 for FeO. It is suggested that the anomalous ratios may be explained by a breakdown of the exchange mechanism caused by an exchange mechanism.
Journal ArticleDOI
Optical Spectra of Transition‐Metal Ions in Corundum
TL;DR: In this article, a theory of the band strength based on the point-charge model and p-d mixing has been developed and applied to the data with results in fair agreement with experiment.
Journal Article
Optical spectra of transition-metal ions in corundum
TL;DR: In this article, a theory of the band strength based on the point-charge model and p-d mixing has been developed and applied to the data with results in fair agreement with experiment.
Journal ArticleDOI
Study of the K edges of 3 d transition metals in pure and oxide form by x-ray-absorption spectroscopy
TL;DR: In this paper, the spectral nearedge structure (NES) of metal and oxides is analyzed and compared to symmetry-based molecular-orbital (MO) theory for both the metal and oxide data.