Ghaffari, M.Shannon, M.Hui H.Tan O.K.Irannejad, A.2016-02-082016-02-0820120039-6028http://hdl.handle.net/11693/21574In 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.EnglishEXAFSHigh temperature solid state reactionPerovskiteSrTi (1 - x)Fe (x)O (3 - δ) (STF x)UPSXPSChemical stateCrystalline structureCubic perovskiteElectronic band gapsEXAFSExtended X-ray absorption fine structuresHigh temperature solid-state reactionIron dopingLocal structureOxygen latticePerovskite structuresScanning electron microscopesSolid state reaction methodSurface stateUPSValence band edgesElectronic propertiesElectronsExtended X ray absorption fine structure spectroscopyIronPerovskitePhotonsScanning electron microscopySolid state reactionsSurface structureTransmission electron microscopyUltraviolet photoelectron spectroscopyValence bandsX ray diffractionX ray photoelectron spectroscopyCrystal structureArticle10.1016/j.susc.2011.12.013