Unveiling point defects in titania mesocrystals: a combined EPR and XPS study

Elizaveta Konstantinova, Anton Minnekhanov, Artemii Beltiukov, Vladimir Ivanov, Andrew James Sutherland, Olga Boytsova

Research output: Contribution to journalArticle

Abstract

Titania mesocrystals, prepared using a polyethylene template, were studied by a combination of electron microscopy, XPS and EPR techniques. The electronic structure and local environment of point defects in the TiO2 mesocrystals were deduced from experimental and simulated EPR data. The Ti3+/F centers and oxygen defects were shown to be the most photosensitive. The presence of carbon radicals was also demonstrated. Since the point defects govern TiO2 photosensitivity and photocatalytic activity in the visible spectral range, the data obtained provide new insights into photocatalytic reactions engineering using titania mesocrystals
LanguageEnglish
Pages15184-15189
JournalNew Journal of Chemistry
Volume42
Issue number18
Early online date2 Aug 2018
DOIs
Publication statusE-pub ahead of print - 2 Aug 2018

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Point defects
Paramagnetic resonance
X ray photoelectron spectroscopy
Photosensitivity
Polyethylene
Electron microscopy
Electronic structure
Carbon
Oxygen
Defects
titanium dioxide

Bibliographical note

© The Royal Society of Chemistry 2018

Cite this

Konstantinova, E., Minnekhanov, A., Beltiukov, A., Ivanov, V., Sutherland, A. J., & Boytsova, O. (2018). Unveiling point defects in titania mesocrystals: a combined EPR and XPS study. New Journal of Chemistry, 42(18), 15184-15189 . https://doi.org/10.1039/C8NJ03196G
Konstantinova, Elizaveta ; Minnekhanov, Anton ; Beltiukov, Artemii ; Ivanov, Vladimir ; Sutherland, Andrew James ; Boytsova, Olga. / Unveiling point defects in titania mesocrystals: a combined EPR and XPS study. In: New Journal of Chemistry. 2018 ; Vol. 42, No. 18. pp. 15184-15189 .
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Konstantinova, E, Minnekhanov, A, Beltiukov, A, Ivanov, V, Sutherland, AJ & Boytsova, O 2018, 'Unveiling point defects in titania mesocrystals: a combined EPR and XPS study' New Journal of Chemistry, vol. 42, no. 18, pp. 15184-15189 . https://doi.org/10.1039/C8NJ03196G

Unveiling point defects in titania mesocrystals: a combined EPR and XPS study. / Konstantinova, Elizaveta; Minnekhanov, Anton; Beltiukov, Artemii; Ivanov, Vladimir; Sutherland, Andrew James; Boytsova, Olga.

In: New Journal of Chemistry, Vol. 42, No. 18, 02.08.2018, p. 15184-15189 .

Research output: Contribution to journalArticle

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AU - Ivanov, Vladimir

AU - Sutherland, Andrew James

AU - Boytsova, Olga

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AB - Titania mesocrystals, prepared using a polyethylene template, were studied by a combination of electron microscopy, XPS and EPR techniques. The electronic structure and local environment of point defects in the TiO2 mesocrystals were deduced from experimental and simulated EPR data. The Ti3+/F centers and oxygen defects were shown to be the most photosensitive. The presence of carbon radicals was also demonstrated. Since the point defects govern TiO2 photosensitivity and photocatalytic activity in the visible spectral range, the data obtained provide new insights into photocatalytic reactions engineering using titania mesocrystals

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Konstantinova E, Minnekhanov A, Beltiukov A, Ivanov V, Sutherland AJ, Boytsova O. Unveiling point defects in titania mesocrystals: a combined EPR and XPS study. New Journal of Chemistry. 2018 Aug 2;42(18):15184-15189 . https://doi.org/10.1039/C8NJ03196G