a bi 2+ Doped near-infrared long afterglow material and its preparation method and application
A technology of foreign ministers and doping elements, used in luminescent materials, material excitation analysis, chemical instruments and methods, etc., can solve problems such as difficulty in optimizing long afterglow properties, short afterglow time, etc., to expand selectivity, promote development, Improve the effect of development space
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Embodiment 1
[0034] The near-infrared long afterglow material of this embodiment, the matrix material is CaSnO 3 The doping ions are Bi, Mo, Y, and the doping amount is 0.5mol%. According to the above components, weigh calcium carbonate, tin dioxide, bismuth oxide, molybdenum oxide, and yttrium oxide respectively, and grind and mix them at 1200 ° C Bake for 2 hours.
[0035] The near-infrared fluorescence spectrum of the sample prepared in this embodiment is as follows: figure 1 As shown, under the excitation of 312nm, the fluorescence of 788nm is emitted, and the luminescence of 788nm corresponds to the excitation peak as figure 1 The excitation spectrum is shown on the left. figure 2 The long afterglow spectrum of the near-infrared long afterglow material prepared in this embodiment is shown for 1 minute after being irradiated with sunlight for 10 minutes, indicating that the material has long afterglow characteristics. image 3 The samples prepared for this example were irradiated u...
Embodiment 2
[0037] The near-infrared long afterglow material of this embodiment, the matrix material is CaSnO 3 The doping ions are Bi, Zr, La, and the doping amount is 5mol%. According to the above components, calcium carbonate, tin oxide, bismuth oxide, zirconium oxide, and lanthanum oxide are respectively weighed, and fired at 1100 ° C after grinding and mixing 4 hours.
[0038] Figure 4 The samples prepared for this example were irradiated under sunlight for 10 minutes to monitor the afterglow attenuation at 788 nm, which shows that the material has a long near-infrared afterglow for a certain period of time.
Embodiment 3
[0040] The near-infrared long afterglow material of this embodiment, the matrix material is SrSnO 3 ; The doping ions are Bi, Nb, Y, and the doping amount is 2 mol%. According to the above ingredients, strontium carbonate, tin dioxide, bismuth oxide, niobium oxide, and yttrium oxide were weighed, ground and mixed, and fired at 1300°C for 4 hours.
[0041] Figure 5 It shows that under the excitation of 298nm, the fluorescence of 808nm is emitted, and the luminescence of 808nm corresponds to the excitation peak as Figure 5 The excitation spectrum is shown on the left. Figure 6 The samples prepared for this example were irradiated under sunlight for 10 minutes to monitor the afterglow attenuation at 808 nm, which shows that the material has a long near-infrared afterglow for a certain period of time.
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