Low temperature synthesis, structural and dosimetric characterization of ZnAl2O4:Ce3+ nanophosphor

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
B S RavikumarB M Nagabhushana

Abstract

Dosimetric properties of γ-irradiated ZnAl2O4:Ce(3+) (1-9 mol%) nanophosphors were studied and reported for the first time. The phosphor prepared by solution combustion route was well characterized by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. PXRD patterns of calcined phosphor show pure cubic phase of ZnAl2O4:Ce(3+). Flake type morphology was observed from SEM studies. The particle size estimated by Scherrer's and Williamson Hall (W-H) plots and found to be in the range 11-17 nm. From photoluminescence (PL) studies two characteristic emission peaks at 363 and 480 nm were observed due to 5d-4f transitions of Ce(3+) ions. The thermoluminescence (TL) glow curves of ZnAl2O4:Ce(3+) (1-9 mol%) nanophosphor recorded two glow peaks 145 and 215 °C at a warming rate of 2.5 °C s(-1). The optimized TL intensity was observed for ∼5 mol% Ce(3+) concentration. The two TL glow peaks in the γ-irradiated (0.1-6 kGy) ZnAl2O4:Ce(3+) (5 mol%) nanophosphor indicates that two set of traps were activated within the temperature range 145 and 215 °C. The kinetic parameters (E,b,s) associated with the prominent glow peaks were estimated using Chen's glow peak shape method. T...Continue Reading

References

Aug 1, 1964·Journal of Ultrastructure Research·J M SHACKLEFORD, R W WYCKOFF

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Citations

Feb 2, 2016·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Mithlesh Kumar, M Mohapatra
Mar 15, 2015·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·J MalleshappaC Shivakumara
Dec 3, 2014·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·B S RavikumarK S Anantharaju

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