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Sol-Gel Derived Eu3+-Doped Gd2Ti2O7 Pyrochlore Nanopowders
Joint Authors
Marinović-Cincović, Milena
Dramićanin, Miroslav D.
Ćulubrk, Sanja
Antić, Željka
Lojpur, Vesna
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-03-02
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Herein we presented hydrolytic sol-gel synthesis and photoluminescent properties of Eu3+-doped Gd2Ti2O7 pyrochlore nanopowders.
According to Gd2Ti2O7 precursor gel thermal analysis a temperature of 840°C is identified for the formation of the crystalline pyrochlore phase.
Obtained samples were systematically characterized by powder X-ray diffraction, scanning and transmission electron microscopy, and photoluminescence spectroscopy.
The powders consist of well-crystalline cubic nanocrystallites of approximately 20 nm in size as evidenced from X-ray diffraction.
The scanning and transmission electron microscopy shows that investigated Eu3+-doped Gd2Ti2O7 nanopowders consist of compact, dense aggregates composed entirely of nanoparticles with variable both shape and dimension.
The influence of Eu3+ ions concentration on the optical properties, namely, photoluminescence emission and decay time, is measured and discussed.
Emission intensity as a function of Eu3+ ions concentration shows that Gd2Ti2O7 host can accept Eu3+ ions in concentrations up to 10 at.%.
On the other hand, lifetime values are similar up to 3 at.% (~2.7 ms) and experience decrease at higher concentrations (2.4 ms for 10 at.% Eu3+).
Moreover, photoluminescent spectra and lifetime values clearly revealed presence of structural defects in sol-gel derived materials proposing photoluminescent spectroscopy as a sensitive tool for monitoring structural changes in both steady state and lifetime domains.
American Psychological Association (APA)
Ćulubrk, Sanja& Antić, Željka& Lojpur, Vesna& Marinović-Cincović, Milena& Dramićanin, Miroslav D.. 2015. Sol-Gel Derived Eu3+-Doped Gd2Ti2O7 Pyrochlore Nanopowders. Journal of Nanomaterials،Vol. 2015, no. 2015, pp.1-8.
https://search.emarefa.net/detail/BIM-1069077
Modern Language Association (MLA)
Ćulubrk, Sanja…[et al.]. Sol-Gel Derived Eu3+-Doped Gd2Ti2O7 Pyrochlore Nanopowders. Journal of Nanomaterials No. 2015 (2015), pp.1-8.
https://search.emarefa.net/detail/BIM-1069077
American Medical Association (AMA)
Ćulubrk, Sanja& Antić, Željka& Lojpur, Vesna& Marinović-Cincović, Milena& Dramićanin, Miroslav D.. Sol-Gel Derived Eu3+-Doped Gd2Ti2O7 Pyrochlore Nanopowders. Journal of Nanomaterials. 2015. Vol. 2015, no. 2015, pp.1-8.
https://search.emarefa.net/detail/BIM-1069077
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1069077