Journal Article

PUBDB-2025-04481

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Oxygen Vacancy-Induced Phase Transformations of Iron-Doped Titanium Oxide Nanostructures

Strapasson, G.Extern* ; Arjona, A. S. ; McPeak, J. E. ; Aalling-Frederiksen, O.Extern* ; Sapnik, A. F. ; Baun, N. L.Extern* ; Bordallo, H. N. ; Rodella, C. B. (Corresponding author) ; Zanchet, D. (Corresponding author) ; Jensen, K. M. Ø. (Corresponding author)Extern*

2025
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acsnano.5c08093  doi:10.3204/PUBDB-2025-04481

Abstract: 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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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20230285 EC (I-20230285-EC) (I-20230285-EC)
3. FS-Proposal: I-20230183 (I-20230183) (I-20230183)
4. MatMech - Live Tapings of Material Formation: Unravelling formation mechanisms in materials chemistry through Multimodal X-ray total scattering studies (804066) (804066)

Experiment(s):

1. PETRA Beamline P02.1 (PETRA III)

Appears in the scientific report 2025

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 15 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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