KFU. Card publication. Oxygen vacancies, hydroxyl groups and fluorine ions in the local environment of Yb3+ ions doped in CeO2 nanoparticles

KAZAN
FEDERAL UNIVERSITY

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OXYGEN VACANCIES, HYDROXYL GROUPS AND FLUORINE IONS IN THE LOCAL ENVIRONMENT OF YB3+ IONS DOPED IN CEO2 NANOPARTICLES

Form of presentation

Articles in international journals and collections

Year of publication

2024

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Authors, employees of KFU

Korableva Stella Leonidovna, author

Morozov Oleg Aleksandrovich, author

Rakhmatullin Rafail Mansurovich, author

Rodionov Aleksandr Aleksandrovich, author

Bibliographic description in the original language

R.M. Rakhmatullin, Oxygen vacancies, hydroxyl groups and fluorine ions in the local environment of Yb3+ ions doped in CeO2 nanoparticles /R.M. Rakhmatullin, O.A. Morozov, S.L. Korableva, A.A. Rodionov, // Ceramics International, Volume 50, Issue 22, Part B, 15 November 2024, Pages 46516-46521

Annotation

The local environment of Yb3+ ions doped into ceria (CeO2) nanoparticles, synthesized by two different methods, was determined using EPR spectroscopy. It was found that the charge compensator for the Yb3+ ion located in the nearest environment can be a vacancy, a hydroxyl group, or a fluorine ion. The EPR spectra of Yb3+ ions at concentrations of 0.1 mol% and 0.5 mol% in ceria nanoparticles, prepared using the coprecipitation technique from an aqueous solution, are mainly due to cubic sites, which indicate the remote location of the charge compensators. The EPR lines resulting from trigonal sites in these samples suggested that the charge compensation is associated with a hydroxyl group. The FTIR measurements correlate with this supposition. After annealing the samples in a vacuum furnace, EPR lines from trigonal sites related to oxygen vacancies were observed. The second type of ceria nanoparticle was prepared by annealing CeF3 nanoparticles in air. EPR spectra of Yb³⁺ ions at concentrations of 0.1 mol% and 0.5 mol% in these samples revealed that the lines from trigonal sites were mainly associated with fluorine ions in the nearest environment.

Keywords

Nanoparticles, CeO2, CeF3, Oxygen vacancies, EPR spectroscopy

The name of the journal

Ceramics International

URL

https://doi.org/10.1016/j.ceramint.2024.09.003

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=307475&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Korableva Stella Leonidovna	ru_RU
dc.contributor.author	Morozov Oleg Aleksandrovich	ru_RU
dc.contributor.author	Rakhmatullin Rafail Mansurovich	ru_RU
dc.contributor.author	Rodionov Aleksandr Aleksandrovich	ru_RU
dc.date.accessioned	2024-01-01T00:00:00Z	ru_RU
dc.date.available	2024-01-01T00:00:00Z	ru_RU
dc.date.issued	2024	ru_RU
dc.identifier.citation	R.M. Rakhmatullin, Oxygen vacancies, hydroxyl groups and fluorine ions in the local environment of Yb3+ ions doped in CeO2 nanoparticles /R.M. Rakhmatullin, O.A. Morozov, S.L. Korableva, A.A. Rodionov, // Ceramics International, Volume 50, Issue 22, Part B, 15 November 2024, Pages 46516-46521	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=307475&p_lang=2	ru_RU
dc.description.abstract	Ceramics International	ru_RU
dc.description.abstract	The local environment of Yb3+ ions doped into ceria (CeO2) nanoparticles, synthesized by two different methods, was determined using EPR spectroscopy. It was found that the charge compensator for the Yb3+ ion located in the nearest environment can be a vacancy, a hydroxyl group, or a fluorine ion. The EPR spectra of Yb3+ ions at concentrations of 0.1 mol% and 0.5 mol% in ceria nanoparticles, prepared using the coprecipitation technique from an aqueous solution, are mainly due to cubic sites, which indicate the remote location of the charge compensators. The EPR lines resulting from trigonal sites in these samples suggested that the charge compensation is associated with a hydroxyl group. The FTIR measurements correlate with this supposition. After annealing the samples in a vacuum furnace, EPR lines from trigonal sites related to oxygen vacancies were observed. The second type of ceria nanoparticle was prepared by annealing CeF3 nanoparticles in air. EPR spectra of Yb³⁺ ions at concentrations of 0.1 mol% and 0.5 mol% in these samples revealed that the lines from trigonal sites were mainly associated with fluorine ions in the nearest environment.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Nanoparticles	ru_RU
dc.subject	CeO2	ru_RU
dc.subject	CeF3	ru_RU
dc.subject	Oxygen vacancies	ru_RU
dc.subject	EPR spectroscopy	ru_RU
dc.title	Oxygen vacancies, hydroxyl groups and fluorine ions in the local environment of Yb3+ ions doped in CeO2 nanoparticles	ru_RU
dc.type	Articles in international journals and collections	ru_RU