Y2O3/SmS Compounds with a Core–Shell Nanostructure: Synthesis Features and Real Structure Full article
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Chemical Physics Letters
ISSN: 0009-2614 , E-ISSN: 1873-4448 |
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| Output data | Year: 2023, Volume: 826, Article number : 140636, Pages count : 9 DOI: 10.1016/j.cplett.2023.140636 | ||||
| Tags | Lanthanide sulfide; Lanthanide oxide; Lanthanide; Seebeck coefficient; Sol–gel synthesis; Core–shell; Topological reactions | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Russian Science Foundation | 22-73-00013 (122082500073-4) |
Abstract:
The Y2O3@SmS composite with a core–shell nanostructure was synthesized using the polyol sol–gel method. For the first time the oxide powder Y2O3@Sm2O3 precursor was obtained from Y2O3 and Sm(acac)3 solutions in diatomic alcohol ethylene glycol C2H4(OH)2 by the precipitation of urea (NH2)2CO. Next, the precursor was heated to 633 K in the sulfidation atmosphere and annealed at 1423 K to obtain the final Y2O3@SmS composite. It was found that Y2O3@SmS compound contains a small amount of Sm2S3 impurity phase due to the diffusion process of the sulfur atoms of SmS2 phase to the sample surface, followed by a transition of SmS2 to Sm2S3 phase. The short-range order was analyzed using both Raman and XPS spectroscopy. The obtained data showed that Y2O3@SmS composite has a core–shell structure. Y2O3 phase was considered as a core, and the SmS phase – as the shell. Using the SEM and HRTEM data it was found that synthesized sample contained a significant amount of the core–shell nanoparticles with the average size of ∼ 200 nm. The Seebeck coefficient was of –40 µV/K at 430 K. The obtained value was two times greater compared to SmS@Y2O2S and Y2O2S@SmS core–shell compounds studied previously.
Cite:
Sotnikov A.V.
, Syrokvashin M.M.
, Bakovets V.V.
, Korotaev E.V.
, Gerasimov E.Y.
Y2O3/SmS Compounds with a Core–Shell Nanostructure: Synthesis Features and Real Structure
Chemical Physics Letters. 2023. V.826. 140636 :1-9. DOI: 10.1016/j.cplett.2023.140636 WOS Scopus РИНЦ ANCAN OpenAlex
Y2O3/SmS Compounds with a Core–Shell Nanostructure: Synthesis Features and Real Structure
Chemical Physics Letters. 2023. V.826. 140636 :1-9. DOI: 10.1016/j.cplett.2023.140636 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Apr 17, 2023 |
| Accepted: | Jun 1, 2023 |
| Published online: | Jun 7, 2023 |
| Published print: | Sep 1, 2023 |
Identifiers:
| Web of science: | WOS:001024806400001 |
| Scopus: | 2-s2.0-85161681668 |
| Elibrary: | 54385575 |
| Chemical Abstracts: | 2023:1229996 |
| Chemical Abstracts (print): | 183:181984 |
| OpenAlex: | W4379741057 |