Mechanosynthesis and structural characterization of nanocrystalline Ce1-xYxO2-δ (x=0.1-0.35) solid solutions

Martin Fabián; Bratislav Antić; Vladimír Girman; Milica Vučinić-Vasić; Aleksandar Kremenović; Shigeru Suzuki; Horst Hahn; Vladimír Šepelák

doi:10.1016/j.jssc.2015.06.027

Mechanosynthesis and structural characterization of nanocrystalline Ce_1-xY_xO_2-δ (x=0.1-0.35) solid solutions

Martin Fabián, Bratislav Antić, Vladimír Girman, Milica Vučinić-Vasić, Aleksandar Kremenović, Shigeru Suzuki, Horst Hahn, Vladimír Šepelák

Division of Inorganic Material Research

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

Abstract A series of nanostructured fluorite-type Ce_1-xY_xO_2-δ (0≤x≤0.35) solid solutions, prepared via high-energy milling of the CeO₂/Y₂O₃ mixtures, are investigated by XRD, HR-TEM, EDS and Raman spectroscopy. For the first time, complementary information on both the long-range and short-range structural features of mechanosynthesized Ce_1-xY_xO_2-δ, obtained by Rietveld analysis of XRD data and Raman spectroscopy, is provided. The lattice parameters of the as-prepared solid solutions decrease with increasing yttrium content. Rietveld refinements of the XRD data reveal increase in microstrains in the host ceria lattice as a consequence of yttrium incorporation. Raman spectra are directly affected by the presence of oxygen vacancies; their existence is evidenced by the presence of vibration modes at ~560 and ~600 cm^-¹. The detailed spectroscopic investigations enable us to separate extrinsic and intrinsic origin of oxygen vacancies. It is demonstrated that mechanosynthesis can be successfully employed in the one-step preparation of nanocrystalline Ce_1-xY_xO_2-δ solid solutions.

Original language	English
Article number	18954
Pages (from-to)	42-48
Number of pages	7
Journal	Journal of Solid State Chemistry
Volume	230
DOIs	https://doi.org/10.1016/j.jssc.2015.06.027
Publication status	Published - 2015 Jul 3

Keywords

Ceria
Mechanosynthesis
Nanocrystalline material
Oxygen vacancy
Solid solution
Yttrium

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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Mechanosynthesis and structural characterization of nanocrystalline Ce_1-xY_xO_2-δ (x=0.1-0.35) solid solutions. / Fabián, Martin; Antić, Bratislav; Girman, Vladimír; Vučinić-Vasić, Milica; Kremenović, Aleksandar; Suzuki, Shigeru; Hahn, Horst; Šepelák, Vladimír.

In: Journal of Solid State Chemistry, Vol. 230, 18954, 03.07.2015, p. 42-48.

Research output: Contribution to journal › Article › peer-review

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title = "Mechanosynthesis and structural characterization of nanocrystalline Ce1-xYxO2-δ (x=0.1-0.35) solid solutions",

abstract = "Abstract A series of nanostructured fluorite-type Ce1-xYxO2-δ (0≤x≤0.35) solid solutions, prepared via high-energy milling of the CeO2/Y2O3 mixtures, are investigated by XRD, HR-TEM, EDS and Raman spectroscopy. For the first time, complementary information on both the long-range and short-range structural features of mechanosynthesized Ce1-xYxO2-δ, obtained by Rietveld analysis of XRD data and Raman spectroscopy, is provided. The lattice parameters of the as-prepared solid solutions decrease with increasing yttrium content. Rietveld refinements of the XRD data reveal increase in microstrains in the host ceria lattice as a consequence of yttrium incorporation. Raman spectra are directly affected by the presence of oxygen vacancies; their existence is evidenced by the presence of vibration modes at ~560 and ~600 cm-1. The detailed spectroscopic investigations enable us to separate extrinsic and intrinsic origin of oxygen vacancies. It is demonstrated that mechanosynthesis can be successfully employed in the one-step preparation of nanocrystalline Ce1-xYxO2-δ solid solutions.",

keywords = "Ceria, Mechanosynthesis, Nanocrystalline material, Oxygen vacancy, Solid solution, Yttrium",

author = "Martin Fabi{\'a}n and Bratislav Anti{\'c} and Vladim{\'i}r Girman and Milica Vu{\v c}ini{\'c}-Vasi{\'c} and Aleksandar Kremenovi{\'c} and Shigeru Suzuki and Horst Hahn and Vladim{\'i}r {\v S}epel{\'a}k",

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AU - Fabián, Martin

AU - Antić, Bratislav

AU - Girman, Vladimír

AU - Vučinić-Vasić, Milica

AU - Kremenović, Aleksandar

AU - Suzuki, Shigeru

AU - Hahn, Horst

AU - Šepelák, Vladimír

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AB - Abstract A series of nanostructured fluorite-type Ce1-xYxO2-δ (0≤x≤0.35) solid solutions, prepared via high-energy milling of the CeO2/Y2O3 mixtures, are investigated by XRD, HR-TEM, EDS and Raman spectroscopy. For the first time, complementary information on both the long-range and short-range structural features of mechanosynthesized Ce1-xYxO2-δ, obtained by Rietveld analysis of XRD data and Raman spectroscopy, is provided. The lattice parameters of the as-prepared solid solutions decrease with increasing yttrium content. Rietveld refinements of the XRD data reveal increase in microstrains in the host ceria lattice as a consequence of yttrium incorporation. Raman spectra are directly affected by the presence of oxygen vacancies; their existence is evidenced by the presence of vibration modes at ~560 and ~600 cm-1. The detailed spectroscopic investigations enable us to separate extrinsic and intrinsic origin of oxygen vacancies. It is demonstrated that mechanosynthesis can be successfully employed in the one-step preparation of nanocrystalline Ce1-xYxO2-δ solid solutions.

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