Issue 30, 2014

Controlled synthesis and novel luminescence properties of string SrWO4:Eu3+ nanobeans

Abstract

One-dimensional SrWO4:Eu3+ nanostructures were prepared by a hydrothermal method. The structures and morphologies of the nanocrystals were characterized by X-ray diffraction, Raman spectroscopy, transmission electron microscopy, and scanning electron microscopy. The results indicated that the phase compositions, morphologies and sizes and luminescence properties of SrWO4:Eu3+ are related to the initial reactant content and reaction time, and lower initial reactant content is beneficial for the formation of the string SrWO4:Eu3+ nanobeans. The photoluminescence properties of SrWO4:Eu3+ were investigated in detail. In the emission spectra of SrWO4:Eu3+, the 5D07F1 is dominant when the excitation wavelength is 295 nm, while the 5D07F2 is dominant when the excitation wavelengths are in the range of 363–537 nm. Obviously, the string SrWO4:Eu3+ nanobeans have multiple luminescence centers or emitting states. The excitation spectra of SrWO4:Eu3+ contain several sharp peaks attributed to f–f transitions of Eu3+ ions and a broad excitation band assigned to the overlap of WO43− absorption and charge transfer transition between Eu3+ and O2−. The intensity ratio of the broad excitation band to the sharp excitation peaks changed with the emission wavelength as well as the Eu3+ content. In addition, Eu3+ ions occupy higher symmetry sites in SrWO4:Eu3+ nanocrystals with increasing the particle size of nanocrystals. The effect of Tb3+ as well as Gd3+ ions on the photoluminescence of SrWO4:Eu3+ was also investigated.

Graphical abstract: Controlled synthesis and novel luminescence properties of string SrWO4:Eu3+ nanobeans

Supplementary files

Article information

Article type
Paper
Submitted
15 Feb 2014
Accepted
04 Apr 2014
First published
30 Apr 2014

Dalton Trans., 2014,43, 11493-11501

Controlled synthesis and novel luminescence properties of string SrWO4:Eu3+ nanobeans

B. Xu, X. Cao, G. Wang, Y. Li, Y. Wang and J. Su, Dalton Trans., 2014, 43, 11493 DOI: 10.1039/C4DT00489B

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