Time-resolved photoluminescence analysis of distribution and migration of terbium ions in zeolites X
- 1. National Institute for Laser, Plasma and Radiation Physics, Quantum Electronics of Solid, Atomistilor street, P.O.Box MG-36, RO 76900, Bucharest-Magurele (Romania)
- 2. National Institute of Materials Physics, PO Box MG-07, 077125 Bucharest-Magurele (Romania)
- 3. Institut fuer Chemie (Physikalische Chemie) Universitaet, Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Golm (Germany)
Description
The photoluminescence (PL) dynamics of terbium-exchanged zeolites X was investigated upon laser excitation at 355 nm. The results evidenced the presence of at least two terbium main environments with PL lifetimes varying between 391-411 and 753-770 μs. The two-site nature of terbium distribution in zeolites X permitted a quantitative analysis of the migration process of terbium ions inside the pores and cavities upon dehydration in air at 200 deg. C. Besides the increase of the PL lifetimes with about 30% and 80% compared to those of the hydrated zeolite, a fraction of almost 30% of terbium ions was estimated to migrate from the supercages to the neighboring sodalites or hexagonal prisms. Our results evidenced for the first time the capability of time-resolved luminescence spectroscopy in quantitatively tracking for the intrazeolitic migration of lanthanides
Additional details
Identifiers
- DOI
- 10.1016/j.physb.2004.08.015;
- PII
- S0921-4526(04)00879-8;
Publishing Information
- Journal Title
- Physica. B, Condensed Matter
- Journal Volume
- 352
- Journal Issue
- 1-4
- Journal Page Range
- p. 358-365
- ISSN
- 0921-4526
- CODEN
- PHYBE3
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 36057892
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- DEHYDRATION; DISTRIBUTION; DYNAMICS; EMISSION SPECTROSCOPY; EXCITATION; LIFETIME; MIGRATION; PHOTOLUMINESCENCE; TERBIUM; TERBIUM IONS; TIME RESOLUTION; ZEOLITES
- Descriptors DEC
- CHARGED PARTICLES; ELEMENTS; EMISSION; ENERGY-LEVEL TRANSITIONS; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; IONS; LUMINESCENCE; MATERIALS; MECHANICS; METALS; MINERALS; PHOTON EMISSION; RARE EARTHS; RESOLUTION; SILICATE MINERALS; SPECTROSCOPY; TIMING PROPERTIES
Optional Information
- Copyright
- Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.