Preparation, surface state and band structure studies of SrTi (1-X)Fe (x)O (3-δ) (x = 0-1) perovskite-type nano structure by X-ray and ultraviolet photoelectron spectroscopy
670 - 677
Item Usage Stats
MetadataShow full item record
In this report, SrTi (1 - x)Fe (x)O (3 - δ) photocatalyst powder was synthesized by a high temperature solid state reaction method. The morphology, crystalline structures of obtained samples, was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscopy (TEM), respectively. The electronic properties and local structure of the perovskite STF x (0 ≤ x ≤ 1) systems have been probed by extended X-ray absorption fine structure (EXAFS) spectroscopy. The effects of iron doping level x (x = 0-1) on the crystal structure and chemical state of the STF x have been investigated by X-ray photoelectron spectroscopy and the valence band edges for electronic band gaps were obtained for STF x by ultraviolet photoelectron spectroscopy (UPS). A single cubic perovskite phase of STF x oxide was successfully obtained at 1200 °C for 24 h by the solid state reaction method. The XPS results showed that the iron present in the STF x perovskite structure is composed of a mixture of Fe 3+ and Fe 4+ (SrTi (1 - x)[Fe 3+, Fe 4+] (x)O (3 - δ)). When the content x of iron doping was increased, the amount of Fe 3+ and Fe 4+ increased significantly and the oxygen lattice decreased on the surface of STF x oxide. The UPS data has confirmed that with more substitution of iron, the position of the valence band decreased. © 2011 Elsevier B.V. All rights reserved.
High temperature solid state reaction
SrTi (1 - x)Fe (x)O (3 - δ) (STF x)
Electronic band gaps
Extended X-ray absorption fine structures
High temperature solid-state reaction
Scanning electron microscopes
Solid state reaction method
Valence band edges
Extended X ray absorption fine structure spectroscopy
Scanning electron microscopy
Solid state reactions
Transmission electron microscopy
Ultraviolet photoelectron spectroscopy
X ray diffraction
X ray photoelectron spectroscopy
Published Version (Please cite this version)http://dx.doi.org/10.1016/j.susc.2011.12.013
Showing items related by title, author, creator and subject.
Structural, microstructural and thermal properties of lead-free bismuth-sodium-barium-titanate piezoceramics synthesized by mechanical alloying Amini, R.; Ghazanfari, M.R.; Alizadeh, M.; Ardakani H.A.; Ghaffari, M. (2013)Bismuth-sodium-barium-titanate piezoceramics with a composition of (Bi 0.5Na0.5)0.94Ba0.06TiO3 (BNBT) were prepared by mechanical alloying (MA). Structural analysis and phase identification were performed by X-ray diffraction ...
Dynamical screening effects in hot-electron scattering from electron-hole plasma and LO-phonon modes in quantum wires Bennett, C. R.; Tanatar, Bilal; Constantinou, N. C. (Elsevier, 1996)We present a fully dynamical and finite temperature study of the hot-electron momentum relaxation rate and the power loss in a coupled system of electron-hole plasma and bulk LO-phonons in a quantum wire structure. ...
Spin correlations in electron liquids: Analytical results for the local-field correction in two and three dimensions Tanatar, Bilal; Mutluay, N. (Springer, 1998)We study the spin correlations in two- and three-dimensional electron liquids within the sum-rule version of the self-consistent field approach of Singwi, Tosi, Land, and Sjölander. Analytic expressions for the spin-antisymmetric ...