Photoluminescent films of microporous titanosilicate ETS-10 doped with europium(III)
authors Lin, Z; Rainho, JP; Domingues, J; Carlos, LD; Rocha, J
nationality International
journal MICROPOROUS AND MESOPOROUS MATERIALS
author keywords photoluminescence; ETS-10; films; preferred orientation; polymorph C
keywords MEMBRANES; SEPARATION; PHOSPHORS; SITES
abstract Eu3+-ETS-10 powders and films supported on dense alpha-alumina and stainless steel substrates have been prepared via seeded hydrothermal synthesis, followed by conventional ion-exchange, and characterised by X-ray diffraction and scanning electron microscopy. ETS-10 films and powders exhibit different photoluminescence characteristics, which have been studied in detail. In particular, for powdered samples direct Eu3+ excitation is comparable to excitation sensitized via lattice energy levels, whereas this latter process largely dominates in films. The emission spectra (intra-4f(6) transitions) and the (corresponding D-5(0)) decay curves, reveal the presence of two distinct Eu3+ local environment in Eu3+-doped ETS-10 powders (Ti/Eu = 10), whereas in films only a single Eu3+ site seems to be present, even at relatively high Eu3+ contents (Ti/Eu = 6, 5). Possible reasons for this disparate behaviour have been discussed. (c) 2004 Elsevier Inc. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 1387-1811
year published 2005
volume 79
issue 1-3
beginning page 13
ending page 19
digital object identifier (doi) 10.1016/j.micromeso.2004.10.007
web of science category Chemistry, Applied; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Chemistry; Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000228108000003
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journal impact factor 4.551
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