Journal
OPTICAL MATERIALS
Volume 67, Issue -, Pages 84-90Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2017.03.052
Keywords
Oil shale ash; Long persistent phosphors; CaAl2O4:Eu2+, Nd3+; SrAl2O4:Eu2+, Dy3+
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Funding
- National Natural Science Foundation of China [51272085, 21171066]
- key technology and equipment of efficient utilization of oil shale resources [OSR-05]
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In this paper, long afterglow luminescent materials CaAl2O4:Eu2+, Nd3+ and SrAl2O4:Eu2+, Dy3+ were successfully synthesized by high temperature solid state reaction using the alumina extracted from oil shale ash. The properties of samples were characterized using X-ray diffraction (XRD), X-ray fluorescence (XRF) photoluminescence (PL) spectra, thermoluminescent (TL) curve, long afterglow material optical test system. CaAl2O4:Eu2+, Nd3+ and SrAl2O4:Eu2+, Dy3+ prepared with alumina extracted from oil shale ash showed persistent phosphorescence in blue (440 nm) and green (515 nm) with persistence time over 10 h for the blue and 8 h for the green. This result indicates that the alumina extracted from oil shale ash can be used to prepare fluorescent materials. This reuse can not only utilize the oil shale ash rationally but also substantially increased the added-value of oil shale ash. (C) 2017 Elsevier B.V. All rights reserved.
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