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• W2000745610 abstract "The influence of Sb-doping on the electronic structure of TiO 2 (rutile) has been investigated by core and valence level photoemission spectroscopy, supplemented by high resolution electron microscopy, SQUID magnetometry and infrared reflectance spectroscopy. Pronounced segregation of Sb to polycrystalline TiO 2 surfaces is evident from core level XPS, with a surface Sb concentration that increases only weakly with nominal Sb doping level in the range between 1% and 10%. Segregated Sb ions may be imaged directly in high resolution transmission electron microscopy. Ultraviolet photoemission spectra reveal the presence of an Sb-induced state toward the bottom of the bulk bandgap. The experimental data are discussed in terms of a model involving bulk substitution of Sb(V) ions onto Ti(IV) sites, largely compensated by cation vacancies or anion interstitials. Electrons are trapped by surface Sb ions to generate an Sb(III) lone-pair-like surface state. The influence of Sb doping on the electronic structure of TiO 2 is contrasted with the behaviour of Sb in SnO 2 ." @default.
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• W2000745610 date "1994-08-01" @default.
• W2000745610 modified "2023-09-25" @default.
• W2000745610 title "A photoemission study of Sb-doped TiO2" @default.
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• W2000745610 doi "https://doi.org/10.1016/0039-6028(94)90138-4" @default.
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