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

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dc.citation.epage677en_US
dc.citation.issueNumber5-6en_US
dc.citation.spage670en_US
dc.citation.volumeNumber606en_US
dc.contributor.authorGhaffari, M.en_US
dc.contributor.authorShannon, M.en_US
dc.contributor.authorHui H.en_US
dc.contributor.authorTan O.K.en_US
dc.contributor.authorIrannejad, A.en_US
dc.date.accessioned2016-02-08T09:48:15Z
dc.date.available2016-02-08T09:48:15Z
dc.date.issued2012en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractIn 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.en_US
dc.identifier.doi10.1016/j.susc.2011.12.013en_US
dc.identifier.issn0039-6028
dc.identifier.urihttp://hdl.handle.net/11693/21574
dc.language.isoEnglishen_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.susc.2011.12.013en_US
dc.source.titleSurface Scienceen_US
dc.subjectEXAFSen_US
dc.subjectHigh temperature solid state reactionen_US
dc.subjectPerovskiteen_US
dc.subjectSrTi (1 - x)Fe (x)O (3 - δ) (STF x)en_US
dc.subjectUPSen_US
dc.subjectXPSen_US
dc.subjectChemical stateen_US
dc.subjectCrystalline structureen_US
dc.subjectCubic perovskiteen_US
dc.subjectElectronic band gapsen_US
dc.subjectEXAFSen_US
dc.subjectExtended X-ray absorption fine structuresen_US
dc.subjectHigh temperature solid-state reactionen_US
dc.subjectIron dopingen_US
dc.subjectLocal structureen_US
dc.subjectOxygen latticeen_US
dc.subjectPerovskite structuresen_US
dc.subjectScanning electron microscopesen_US
dc.subjectSolid state reaction methoden_US
dc.subjectSurface stateen_US
dc.subjectUPSen_US
dc.subjectValence band edgesen_US
dc.subjectElectronic propertiesen_US
dc.subjectElectronsen_US
dc.subjectExtended X ray absorption fine structure spectroscopyen_US
dc.subjectIronen_US
dc.subjectPerovskiteen_US
dc.subjectPhotonsen_US
dc.subjectScanning electron microscopyen_US
dc.subjectSolid state reactionsen_US
dc.subjectSurface structureen_US
dc.subjectTransmission electron microscopyen_US
dc.subjectUltraviolet photoelectron spectroscopyen_US
dc.subjectValence bandsen_US
dc.subjectX ray diffractionen_US
dc.subjectX ray photoelectron spectroscopyen_US
dc.subjectCrystal structureen_US
dc.titlePreparation, 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 spectroscopyen_US
dc.typeArticleen_US

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Department of Electrical and Electronics Engineering
Institute of Materials Science and Nanotechnology (UNAM)