| Texto completo | |
| Autor(es): |
Strapasson, Guilherme B.
;
Arjona, Adrian S.
;
McPeak, Joseph E.
;
Aalling-Frederiksen, Olivia
;
Sapnik, Adam F.
;
Baun, Nanna L.
;
Bordallo, Heloisa N.
;
Rodella, Cristiane B.
;
Zanchet, Daniela
;
Jensen, Kirsten M. O.
Número total de Autores: 10
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ACS NANO; v. 19, n. 34, p. 14-pg., 2025-08-21. |
| Resumo | |
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 TiO2 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 TiO2 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. (AU) | |
| Processo FAPESP: | 20/12986-1 - Design de catalisadores de níquel suportados em nanoestruturas 1D à base de TiO2/Nb2O5 |
| Beneficiário: | Guilherme Boenny Strapasson |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |
| Processo FAPESP: | 23/02561-1 - Estudo in situ de óxidos nanoestruturados de média entropia através de espalhamento total de raios-X e função de distribuição de pares |
| Beneficiário: | Guilherme Boenny Strapasson |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto |
| Processo FAPESP: | 18/01258-5 - Novos processos catalíticos e fotocatalíticos para a conversão direta de metano e CO2 em produtos |
| Beneficiário: | José Maria Correa Bueno |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |