Influence of CeO₂ nanocrystals size on the vacancies formation processes determined by spectroscopic techniques
In the paper influence of the size on the processes of oxygen vacancies formation in CeO₂ nanocrystals has been investigated. Changes in concentration of oxygen vacancies were determined by two independent indicators: intensity of 5d → 4f luminescence of Ce³⁺ ions and ratio between ⁵D₀ → ⁷F₁ and ⁵D₀...
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| Date: | 2014 |
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НТК «Інститут монокристалів» НАН України
2014
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| Cite this: | Influence of CeO₂ nanocrystals size on the vacancies formation processes determined by spectroscopic techniques / P.O. Maksimchuk, V.V. Seminko, I.I. Bespalova, A.A. Masalov // Functional Materials. — 2014. — Т. 21, № 3. — С. 254-259. — Бібліогр.: 13 назв. — англ. |
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Maksimchuk, P.O. Seminko, V.V. Bespalova, I.I. Masalov, A.A. 2017-06-12T07:54:31Z 2017-06-12T07:54:31Z 2014 Influence of CeO₂ nanocrystals size on the vacancies formation processes determined by spectroscopic techniques / P.O. Maksimchuk, V.V. Seminko, I.I. Bespalova, A.A. Masalov // Functional Materials. — 2014. — Т. 21, № 3. — С. 254-259. — Бібліогр.: 13 назв. — англ. 1027-5495 DOI: dx.doi.org/10.15407/fm22.03.255 https://nasplib.isofts.kiev.ua/handle/123456789/120460 In the paper influence of the size on the processes of oxygen vacancies formation in CeO₂ nanocrystals has been investigated. Changes in concentration of oxygen vacancies were determined by two independent indicators: intensity of 5d → 4f luminescence of Ce³⁺ ions and ratio between ⁵D₀ → ⁷F₁ and ⁵D₀ → ⁷F₂ luminescence bands of Eu³⁺ ions incorporated into ceria nanocrystals as structural probes. It was shown that for CeO₂ nanocrystals decrease of the size (from 75 nm to 20 nm) manifests itself in 1.5 times increase of the band intensity associated with vacancy-stabilized Ce³⁺ ions, while for CeO₂:Eu³⁺ nanocrystals it leads to lowering of symmetry for Eu³⁺ centre and correspondent decrease of ⁵D₀ → ⁷F₁/⁵D₀ → ⁷F₂ intensity ratio. It was shown that decrease of the size stimulates formation of the oxygen vacancies in ceria nanoparticles. en НТК «Інститут монокристалів» НАН України Functional Materials Characterization and properties Influence of CeO₂ nanocrystals size on the vacancies formation processes determined by spectroscopic techniques Article published earlier |
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| title |
Influence of CeO₂ nanocrystals size on the vacancies formation processes determined by spectroscopic techniques |
| spellingShingle |
Influence of CeO₂ nanocrystals size on the vacancies formation processes determined by spectroscopic techniques Maksimchuk, P.O. Seminko, V.V. Bespalova, I.I. Masalov, A.A. Characterization and properties |
| title_short |
Influence of CeO₂ nanocrystals size on the vacancies formation processes determined by spectroscopic techniques |
| title_full |
Influence of CeO₂ nanocrystals size on the vacancies formation processes determined by spectroscopic techniques |
| title_fullStr |
Influence of CeO₂ nanocrystals size on the vacancies formation processes determined by spectroscopic techniques |
| title_full_unstemmed |
Influence of CeO₂ nanocrystals size on the vacancies formation processes determined by spectroscopic techniques |
| title_sort |
influence of ceo₂ nanocrystals size on the vacancies formation processes determined by spectroscopic techniques |
| author |
Maksimchuk, P.O. Seminko, V.V. Bespalova, I.I. Masalov, A.A. |
| author_facet |
Maksimchuk, P.O. Seminko, V.V. Bespalova, I.I. Masalov, A.A. |
| topic |
Characterization and properties |
| topic_facet |
Characterization and properties |
| publishDate |
2014 |
| language |
English |
| container_title |
Functional Materials |
| publisher |
НТК «Інститут монокристалів» НАН України |
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Article |
| description |
In the paper influence of the size on the processes of oxygen vacancies formation in CeO₂ nanocrystals has been investigated. Changes in concentration of oxygen vacancies were determined by two independent indicators: intensity of 5d → 4f luminescence of Ce³⁺ ions and ratio between ⁵D₀ → ⁷F₁ and ⁵D₀ → ⁷F₂ luminescence bands of Eu³⁺ ions incorporated into ceria nanocrystals as structural probes. It was shown that for CeO₂ nanocrystals decrease of the size (from 75 nm to 20 nm) manifests itself in 1.5 times increase of the band intensity associated with vacancy-stabilized Ce³⁺ ions, while for CeO₂:Eu³⁺ nanocrystals it leads to lowering of symmetry for Eu³⁺ centre and correspondent decrease of ⁵D₀ → ⁷F₁/⁵D₀ → ⁷F₂ intensity ratio. It was shown that decrease of the size stimulates formation of the oxygen vacancies in ceria nanoparticles.
|
| issn |
1027-5495 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/120460 |
| citation_txt |
Influence of CeO₂ nanocrystals size on the vacancies formation processes determined by spectroscopic techniques / P.O. Maksimchuk, V.V. Seminko, I.I. Bespalova, A.A. Masalov // Functional Materials. — 2014. — Т. 21, № 3. — С. 254-259. — Бібліогр.: 13 назв. — англ. |
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2025-12-07T19:22:17Z |
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2025-12-07T19:22:17Z |
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