Formation of oxygen vacancies in ceria-zirconia nanocrystals studied by spectroscopic techniques
Incorporation of doped ions with different ionic radius (like Zr⁴⁺) or valence state (like Eu³⁺) into CeO₂ structure leads to sufficient modification of the processes of oxygen transport due to formation of additional oxygen vacancies (Ov). These vacancies can form complexes with doped ions (RE-Ov-R...
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| Дата: | 2018 |
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| Автори: | , , , , |
| Формат: | Стаття |
| Мова: | English |
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НТК «Інститут монокристалів» НАН України
2018
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| Назва видання: | Functional Materials |
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| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/157160 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Formation of oxygen vacancies in ceria-zirconia nanocrystals studied by spectroscopic techniques / E.N. Okrushko, V.V. Seminko, P.O. Maksimchuk, I.I. Bespalova, Yu.V. Malyukin // Functional Materials. — 2018. — Т. 25, № 3. — С. 439-444. — Бібліогр.: 16 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
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irk-123456789-1571602019-06-20T01:27:34Z Formation of oxygen vacancies in ceria-zirconia nanocrystals studied by spectroscopic techniques Okrushko, E.N. Seminko, V.V. Maksimchuk, P.O. Bespalova, I.I. Malyukin, Yu.V. Characterization and properties Incorporation of doped ions with different ionic radius (like Zr⁴⁺) or valence state (like Eu³⁺) into CeO₂ structure leads to sufficient modification of the processes of oxygen transport due to formation of additional oxygen vacancies (Ov). These vacancies can form complexes with doped ions (RE-Ov-RE) or cerium ions (Ce³⁺-Ov-Ce³⁺) determining the oxygen mobility in these structures. In the paper the formation of oxygen vacancies in ceria (CeO₂-x) and ceria-zirconia (CeO₂-ZrO₂) nanocrystals was studied by conventional spectroscopic techniques. Ratio between intensities of ⁵D₀->⁷F₁ and ⁵D₀→⁷F₂ spectral lines of Eu³⁺ ions was used for determination of the content of oxygen vacancies and their location within ceria-zirconia nanocrystal. It was shown that while high-temperature treatment of 50 nm ceria nanocrystal in reducing atmosphere leads only to slight change of the content of oxygen vacancies which are formed preferably near its surface, incorporation of 20 % of zirconium ions is manifested in almost tenfold increase of the content of oxygen vacancies as compared to CeO₂-x nanocrystal, and these vacancies are formed within whole nanoparticle. 2018 Article Formation of oxygen vacancies in ceria-zirconia nanocrystals studied by spectroscopic techniques / E.N. Okrushko, V.V. Seminko, P.O. Maksimchuk, I.I. Bespalova, Yu.V. Malyukin // Functional Materials. — 2018. — Т. 25, № 3. — С. 439-444. — Бібліогр.: 16 назв. — англ. 1027-5495 DOI:https://doi.org/10.15407/fm25.03.439 http://dspace.nbuv.gov.ua/handle/123456789/157160 en Functional Materials НТК «Інститут монокристалів» НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Characterization and properties Characterization and properties |
| spellingShingle |
Characterization and properties Characterization and properties Okrushko, E.N. Seminko, V.V. Maksimchuk, P.O. Bespalova, I.I. Malyukin, Yu.V. Formation of oxygen vacancies in ceria-zirconia nanocrystals studied by spectroscopic techniques Functional Materials |
| description |
Incorporation of doped ions with different ionic radius (like Zr⁴⁺) or valence state (like Eu³⁺) into CeO₂ structure leads to sufficient modification of the processes of oxygen transport due to formation of additional oxygen vacancies (Ov). These vacancies can form complexes with doped ions (RE-Ov-RE) or cerium ions (Ce³⁺-Ov-Ce³⁺) determining the oxygen mobility in these structures. In the paper the formation of oxygen vacancies in ceria (CeO₂-x) and ceria-zirconia (CeO₂-ZrO₂) nanocrystals was studied by conventional spectroscopic techniques. Ratio between intensities of ⁵D₀->⁷F₁ and ⁵D₀→⁷F₂ spectral lines of Eu³⁺ ions was used for determination of the content of oxygen vacancies and their location within ceria-zirconia nanocrystal. It was shown that while high-temperature treatment of 50 nm ceria nanocrystal in reducing atmosphere leads only to slight change of the content of oxygen vacancies which are formed preferably near its surface, incorporation of 20 % of zirconium ions is manifested in almost tenfold increase of the content of oxygen vacancies as compared to CeO₂-x nanocrystal, and these vacancies are formed within whole nanoparticle. |
| format |
Article |
| author |
Okrushko, E.N. Seminko, V.V. Maksimchuk, P.O. Bespalova, I.I. Malyukin, Yu.V. |
| author_facet |
Okrushko, E.N. Seminko, V.V. Maksimchuk, P.O. Bespalova, I.I. Malyukin, Yu.V. |
| author_sort |
Okrushko, E.N. |
| title |
Formation of oxygen vacancies in ceria-zirconia nanocrystals studied by spectroscopic techniques |
| title_short |
Formation of oxygen vacancies in ceria-zirconia nanocrystals studied by spectroscopic techniques |
| title_full |
Formation of oxygen vacancies in ceria-zirconia nanocrystals studied by spectroscopic techniques |
| title_fullStr |
Formation of oxygen vacancies in ceria-zirconia nanocrystals studied by spectroscopic techniques |
| title_full_unstemmed |
Formation of oxygen vacancies in ceria-zirconia nanocrystals studied by spectroscopic techniques |
| title_sort |
formation of oxygen vacancies in ceria-zirconia nanocrystals studied by spectroscopic techniques |
| publisher |
НТК «Інститут монокристалів» НАН України |
| publishDate |
2018 |
| topic_facet |
Characterization and properties |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/157160 |
| citation_txt |
Formation of oxygen vacancies in ceria-zirconia nanocrystals studied by spectroscopic techniques / E.N. Okrushko, V.V. Seminko, P.O. Maksimchuk, I.I. Bespalova, Yu.V. Malyukin // Functional Materials. — 2018. — Т. 25, № 3. — С. 439-444. — Бібліогр.: 16 назв. — англ. |
| series |
Functional Materials |
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AT okrushkoen formationofoxygenvacanciesinceriazirconiananocrystalsstudiedbyspectroscopictechniques AT seminkovv formationofoxygenvacanciesinceriazirconiananocrystalsstudiedbyspectroscopictechniques AT maksimchukpo formationofoxygenvacanciesinceriazirconiananocrystalsstudiedbyspectroscopictechniques AT bespalovaii formationofoxygenvacanciesinceriazirconiananocrystalsstudiedbyspectroscopictechniques AT malyukinyuv formationofoxygenvacanciesinceriazirconiananocrystalsstudiedbyspectroscopictechniques |
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2023-05-20T17:51:21Z |
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2023-05-20T17:51:21Z |
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1796154249106685952 |