Spectroscopic Properties of CrOx/Al2O3 Nanopowders Synthesized by cw CO2 Laser Vaporization Full article
| Conference |
The IX International Symposium “Modern Problems of Laser Physics” 23-31 Aug 2021 , Novosibirsk |
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| Journal |
Journal of Physics: Conference Series
ISSN: 1742-6588 , E-ISSN: 1742-6596 |
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| Output data | Year: 2021, Volume: 2067, Article number : 012007, Pages count : 7 DOI: 10.1088/1742-6596/2067/1/012007 | ||
| Tags | Alumina; Aluminum oxide; Carbon dioxide; Carbon dioxide lasers; Chromium compounds; Nanoparticles; Particle size; Spectroscopic analysis; Vaporization | ||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0011 |
| 2 | Russian Foundation for Basic Research | 20-43-540005 |
Abstract:
Nanosized 5.0 wt% Cr/nano-Al2O3 powders with the particle size of ca. 15 nm were synthesized via laser vaporization using irradiation by a cw CO2 laser in different gas atmospheres – Ar, Ar+O2, Ar+H2. All the investigated nanopowders were studied by XRF, XRD, TEM, UV-vis DRS and PL spectroscopy methods. The nanopowders were found to contain the Cr6+ ions located on the surface of Al2O3 nanoparticles and two types of Cr3+ sites. One type is Cr3+ ions located in the bulk (Cr3+b-sites) of Al2O3 matrix in a strong crystal field. The second type is represented by Cr3+ sites residing near the surface (Cr3+s-sites) of CrOx/Al2O3 nanoparticles in a weak crystal field. It was shown that varying the composition of the buffer gas (Ar, Ar+O2, Ar+H2) during laser vaporization makes it possible to control the properties of the obtained 5.0 wt% Cr/nano-Al2O3 nanopowders with a change in Cr6+/Cr3+ ratio in the bulk and on the surface of alumina support.
Cite:
Baronskiy M.G.
, Kostyukov A.I.
, Snytnikov V.N.
Spectroscopic Properties of CrOx/Al2O3 Nanopowders Synthesized by cw CO2 Laser Vaporization
Journal of Physics: Conference Series. 2021. V.2067. 012007 :1-7. DOI: 10.1088/1742-6596/2067/1/012007 Scopus РИНЦ OpenAlex
Spectroscopic Properties of CrOx/Al2O3 Nanopowders Synthesized by cw CO2 Laser Vaporization
Journal of Physics: Conference Series. 2021. V.2067. 012007 :1-7. DOI: 10.1088/1742-6596/2067/1/012007 Scopus РИНЦ OpenAlex
Dates:
| Accepted: | Oct 12, 2021 |
| Published print: | Nov 9, 2021 |
| Published online: | Nov 9, 2021 |
Identifiers:
| Scopus: | 2-s2.0-85120502133 |
| Elibrary: | 47539318 |
| OpenAlex: | W3214012977 |