Influence of CeO₂ nanocrystals size on the vacancies formation processes determined by spectroscopic techniques
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Influence of CeO₂ nanocrystals size on the vacancies formation processes determined by spectroscopic techniques
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| Creator |
Maksimchuk, P.O.
Seminko, V.V. Bespalova, I.I. Masalov, A.A. |
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| Subject |
Characterization and properties
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| 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.
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| Date |
2017-06-12T07:54:31Z
2017-06-12T07:54:31Z 2014 |
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| Type |
Article
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| Identifier |
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 http://dspace.nbuv.gov.ua/handle/123456789/120460 |
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| Language |
en
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| Relation |
Functional Materials
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| Publisher |
НТК «Інститут монокристалів» НАН України
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