Local Structure of Low-Temperature gamma-Al2O3 Phases as Determined by the Luminescence of Cr3+ and Fe3+ Full article
| Journal |
RSC Advances
ISSN: 2046-2069 |
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|---|---|---|---|
| Output data | Year: 2015, Number: 5, Pages: 5686-5694 Pages count : 9 DOI: 10.1039/c4ra14524k | ||
| Tags | Crystal field strengthImpurity concentrationLow temperaturesLuminescent probesMolecular waterPhysicochemical characteristicsRacah parametersSubsurface structures | ||
| Authors |
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| Affiliations |
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Funding (3)
| 1 | Russian Foundation for Basic Research | 13-03-00312 |
| 2 | Russian Foundation for Basic Research | 14-03-31704 |
| 3 |
Skolkovo Foundation BP Chemicals Limited, Research Laboratory |
Abstract:
The g and g* phases of alumina synthesized from crystalline boehmite and pseudoboehmite were shown to
strongly differ in some physicochemical characteristics. Photoluminescence of Cr3+ and Fe3+ as
luminescent probes with their natural impurity concentrations was detected in the tested alumina
samples and the local structure of the samples was examined. The crystal field strength and Racah
parameters in g-Al2O3 phases were determined. The ratio of octahedral and tetrahedral cationic
positions was equal to 1 for g-Al2O3 synthesized from crystalline boehmite, and 0.3 for that obtained
from pseudoboehmite. The effect of residual OH groups and weakly bound molecular water on the local
structure of g-Al2O3 phases was revealed. The luminescence of Cr3+ was detected in subsurface
structures of each alumina; defects produced by nanocrystallites were shown to affect the luminescence.
Cite:
Rastorguev A.
, Baronskiy M.
, Zhuzhgov A.
, Kostyukov A.
, Krivoruchko O.
, Snytnikov V.
Local Structure of Low-Temperature gamma-Al2O3 Phases as Determined by the Luminescence of Cr3+ and Fe3+
RSC Advances. 2015. N5. P.5686-5694. DOI: 10.1039/c4ra14524k WOS Scopus РИНЦ AN OpenAlex
Local Structure of Low-Temperature gamma-Al2O3 Phases as Determined by the Luminescence of Cr3+ and Fe3+
RSC Advances. 2015. N5. P.5686-5694. DOI: 10.1039/c4ra14524k WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Nov 14, 2014 |
| Accepted: | Dec 11, 2014 |
| Published online: | Dec 11, 2014 |
Identifiers:
| Web of science: | WOS:000347304900030 |
| Scopus: | 2-s2.0-84921907416 |
| Elibrary: | 23970114 |
| Chemical Abstracts: | 2014:2095668 |
| OpenAlex: | W2017709389 |