Photoluminescent Properties of Eu3+ in Different γ-, η-, θ-, and α-Al2O3 Polymorphs | Sciact - CRIS-система Института катализа

Photoluminescent Properties of Eu3+ in Different γ-, η-, θ-, and α-Al2O3 Polymorphs Научная публикация

Журнал

Journal of Structural Chemistry
ISSN: 0022-4766 , E-ISSN: 1573-8779

Вых. Данные

Год: 2023, Том: 64, Номер: 12, Страницы: 2391–2403 Страниц : 13 DOI: 10.1134/S0022476623120119

Ключевые слова

γ-Al2O3; η-Al2O3; θ-Al2O3; α-Al2O3; Eu3+ luminescence; phase composition; decay kinetics; asymmetry ratio

Авторы

Kostyukov A.I. ¹ , Baronskii M.G. ¹ , Zhuzhgov A.V. ¹

Организации

1	Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia

Информация о финансировании (2)

1	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	0239-2021-0004
2	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	0239-2021-0011

Photoluminescent properties of the Eu3+ ion as a probe are studied in γ-, η-, θ-, and α-Al2O3:Eu3+ polymorphs with an europium concentration of 0.05 wt.%. The photoluminescence (PL) spectra of Eu3+ ions are analyzed in the 5D0 → 7FJ (J = 0-4) transition region along with the asymmetry ratio, decay kinetics, and PL excitation spectra. It is found that Eu3+ ions incorporate into the Al2O3 lattice and occupy the site with the C3v local symmetry. The biexponential nature of the Eu3+ PL decay kinetics in γ-, η-, θ-, and Al2O3:Eu3+ polymorphs is shown to be due to the occurrence of Eu3+ ions both in the bulk and at subsurface sites. For α-Al2O3:Eu3+ the concentration of surface centers is minimum and the PL decay kinetics is described only by one exponent. Based on the comprehensive analysis of the obtained results on PL of single-phase Al2O3 powders, the characteristic features are revealed, such as PL intensity, electronic structure of 5D0 → 7FJ transitions, asymmetry ratio, position of the O2– → Eu3+ charge transfer band, and 5D0 lifetimes. These characteristics allow the use of Eu3+ ions as structure-sensitive probes to study the local structure of Al2O3 and to identify its phase composition during structural transformations.

Kostyukov A.I. , Baronskii M.G. , Zhuzhgov A.V.
Photoluminescent Properties of Eu3+ in Different γ-, η-, θ-, and α-Al2O3 Polymorphs
Journal of Structural Chemistry. 2023. V.64. N12. P.2391–2403. DOI: 10.1134/S0022476623120119 WOS Scopus РИНЦ CAPlus OpenAlex

Костюков A.И. , Баронский М.Г. , Жужгов А.В.
Фотолюминесцентные свойства Eu3+ в различных полиморфных модификациях γ-, η-, θ- и α-Al2O3
Журнал структурной химии. 2023. Т.64. №12. 119770 :1-14. DOI: 10.26902/jsc_id119770 РИНЦ OpenAlex

Поступила в редакцию:	22 июн. 2023 г.
Принята к публикации:	19 сент. 2023 г.
Опубликована в печати:	29 дек. 2023 г.
Опубликована online:	29 дек. 2023 г.

Web of science:	WOS:001132105400006
Scopus:	2-s2.0-85180902225
РИНЦ:	62892562
Chemical Abstracts:	2024:9898
OpenAlex:	W4390414125

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