Laser-Induced Luminescence of Model Fe/Al2O3 and Cr/Al2O3 Catalysts Full article
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Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2008, Volume: 49, Number: 2, Pages: 291-298 Pages count : 8 DOI: 10.1134/S0023158408020183 | ||
| Tags | Calcination Temperature ; Luminescence Spectrum; Luminescence Intensity; Electronic Diffuse; Luminescence Quenching | ||
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Abstract:
The laser-induced luminescence of Cr3+ impurity ions in model Fe/Al2O3 and Cr/Al2O3 catalysts with different calcination temperatures was studied. It was found that an additional luminescence band at 770 nm appeared in the luminescence spectra of low-temperature samples as a result of the interaction of octahedrally coordinated Cr3+ ions with Fe3+ impurity ions. In the θ-Al2O3 phase with a concentration of Cr3+ ions higher than 0.1 wt %, the interaction of the Cr3+-Cr3+ ion pairs in the immediate surroundings resulted in the appearance of N θ lines due to the splitting of R θ lines. The differences of these lines from the N α lines of α-Al2O3 were related to the individuality of the crystal lattice of the θ phase and the coordination of Cr3+ impurity ions in the immediate surroundings, which is different from that in the α phase. Based on the laser-induced luminescence spectroscopic data, it was found that regions with a local Cr3+ concentration higher than the average Cr3+ concentration in the bulk of a catalyst by one order of magnitude were formed in the α-Al2O3-Fe2O3 system with the bulk Fe and Cr concentrations of 2.5 and 0.04 wt %, respectively, which was calcined at 1220°C, as a result of the diffusion of chromium and iron ions.
Cite:
Snytnikov V.N.
, Stoyanovskii V.O.
, Larina T.V.
, Krivoruchko O.P.
, Ushakov V.A.
, Parmon V.N.
Laser-Induced Luminescence of Model Fe/Al2O3 and Cr/Al2O3 Catalysts
Kinetics and Catalysis. 2008. V.49. N2. P.291-298. DOI: 10.1134/S0023158408020183 WOS Scopus РИНЦ ANCAN OpenAlex
Laser-Induced Luminescence of Model Fe/Al2O3 and Cr/Al2O3 Catalysts
Kinetics and Catalysis. 2008. V.49. N2. P.291-298. DOI: 10.1134/S0023158408020183 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Снытников В.Н.
, Стояновский В.О.
, Ларина Т.В.
, Криворучко О.П.
, Ушаков В.А.
, Пармон В.Н.
Лазерно-индуцированная люминесценция модельных катализаторов Fe/Al2O3 и Cr/Al2O3
Кинетика и катализ. 2008. Т.49. №2. С.307-314. РИНЦ
Лазерно-индуцированная люминесценция модельных катализаторов Fe/Al2O3 и Cr/Al2O3
Кинетика и катализ. 2008. Т.49. №2. С.307-314. РИНЦ
Dates:
| Submitted: | Nov 27, 2006 |
| Published print: | Mar 1, 2008 |
| Published online: | Jan 20, 2011 |
Identifiers:
| Web of science: | WOS:000254964400018 |
| Scopus: | 2-s2.0-42149190080 |
| Elibrary: | 13580782 |
| Chemical Abstracts: | 2008:466811 |
| Chemical Abstracts (print): | 149:481155 |
| OpenAlex: | W2035937544 |