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024 7 _ |a 10.1021/acsnano.5c08093
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100 1 _ |a Strapasson, Guilherme
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245 _ _ |a Oxygen Vacancy-Induced Phase Transformations of Iron-Doped Titanium Oxide Nanostructures
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520 _ _ |a Oxygen vacancies play a pivotal role in tailoring the electronic, optical, and catalytic properties of reducible metal oxides. Here, we provide a complete overview of oxygen vacancy-induced structural evolution of iron-doped titanium oxide nanomaterials with insights into their synthesis, formation, and crystallization processes. Structural analysis combining multiple techniques reveals the formation of anatase nanoparticles at low Fe loadings (i.e., ≤10 at. % Fe). At intermediate Fe concentrations (i.e., 15–20 at. % Fe), a mixture of anatase and rutile forms with the presence of extended disordered defects similar to crystallographic shear planes. These become more notable at high Fe loadings (i.e., ≥30 at. % Fe) with the complete transition to the rutile phase with a high density of defects. Moreover, we provide important information on the nucleation, growth, and crystallization processes during synthesis, emphasizing the impact of Fe atom incorporation on the TiO$_2$ lattice, the formation of reaction intermediates, and the structural evolution at the nano regime. The ability to control oxygen vacancies and engineer defects in Fe-doped TiO$_2$ allows for the optimization of charge transport, enhancing catalytic activity and tuning optical properties for applications in environmental remediation, sensing, and next-generation semiconductor technologies.
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700 1 _ |a Arjona, Adrián S.
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700 1 _ |a McPeak, Joseph E.
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700 1 _ |a Aalling-Frederiksen, Olivia
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700 1 _ |a Sapnik, Adam F.
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700 1 _ |a Bordallo, Heloisa N.
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700 1 _ |a Rodella, Cristiane B.
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700 1 _ |a Zanchet, Daniela
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700 1 _ |a Jensen, Kirsten M. Ø.
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773 _ _ |a 10.1021/acsnano.5c08093
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