Magnetic Properties, Electron Paramagnetic Resonance, and Photoelectron Spectroscopy Studies of Nanocrystalline TiO2 Co-Doped with Al and Fe
| Autor(en): | Yermakov, Anatoly Ye Galakhov, Vadim R. Minin, Artem S. Mesilov, Vitaly V. Uimin, Mikhail A. Kuepper, Karsten Bartkowski, Stefan Molochnikov, Leonid S. Konev, Aleksandr S. Gaviko, Vasiliy S. Zakharova, Galina S. |
Stichwörter: | aluminum doping; ANATASE TIO2; electron paramagnetic resonance; ION-PAIRS; nanoparticles; PHOTOCATALYSTS; photoelectron spectroscopy; Physics; Physics, Condensed Matter; POWDERS; ROOM-TEMPERATURE FERROMAGNETISM; SPECTRA; THIN-FILMS; titanium dioxide; transmission electron microscopy | Erscheinungsdatum: | 2021 | Herausgeber: | WILEY-V C H VERLAG GMBH | Journal: | PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | Volumen: | 258 | Ausgabe: | 3 | Zusammenfassung: | Electron paramagnetic resonance, X-ray photoelectron spectroscopy, field dependence of magnetization, X-ray diffraction, and transmission electron microscopy are applied for the characterization of Al-doped TiO2 nanopowders with Fe impurities synthesized by the autoclave-assisted hydrothermal method and annealed in vacuum or in hydrogen. The sizes of the TiO2:(Al, Fe) nanoparticles are estimated to be about 10-20 nm. It is proposed that Al ions are presumably placed in the TiO2 lattice in interstitial positions. Moreover, Fe3+ ions can occupy tetrahedral positions of Ti4+ ions as a result of Al-doping. The results suggest that Al-doped TiO2 nanopowders with Fe impurities annealed in vacuum or hydrogen display both intrinsic and extrinsic ferromagnetic properties. |
ISSN: | 03701972 | DOI: | 10.1002/pssb.202000399 |
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