Color-controllable long afterglow material excited by ultraviolet light and preparation method thereof
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A long afterglow material and ultraviolet light technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve problems such as difficult to generate effective electron or hole traps
Inactive Publication Date: 2012-07-18
DALIAN MARITIME UNIVERSITY
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[0003] At present, the mature long afterglow materials are mainly Eu 2+ Activated alkaline earth aluminate or silicate materials, their afterglow color is in the near ultraviolet to yellow afterglow region, and the afterglow time is relatively long. Commercial materials are usu
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Embodiment 1
[0026] x moles are 0.001; y moles are 0.005
[0027] ①Weigh 1.0009gCaCO 3 , 1.5071gSnO 2 , 0.0019gTb 4 o 7 , 0.0088gEu 2 o 3 and 0.0309gH 3 BO 3 , mixed thoroughly and put into the crucible;
[0028] ②Calcinate at 1300°C for 5 hours in an air atmosphere;
[0029] ③ Cool, take out and grind.
[0030] The body color of the material is light yellow long afterglow phosphor, after 5 minutes of ultraviolet light irradiation, it will produce yellow-green long afterglow, the wavelength range is 500nm ~ 600nm, and the afterglow time is 3h.
Embodiment 2
[0032] x moles are 0.005; y moles are 0.005
[0033] ①Weigh 1.0009gCaCO 3 , 1.5071gSnO 2 , 0.0094gTb 4 o 7 , 0.0088gEu 2 o 3 and 0.0309gH 3 BO 3 , mixed thoroughly and put into the crucible;
[0034] ②Calcinate at 1300℃ for 5h under air atmosphere,
[0035] ③ Cool, take out and grind
[0036] The body color of the material is light yellow long afterglow phosphor, after 5 minutes of ultraviolet light irradiation, it will produce yellow-green long afterglow, the wavelength range is 500nm-600nm, and the afterglow time is 5h.
Embodiment 3
[0038] x moles are 0.02; y moles are 0.005
[0039] ①Weigh 1.0009gCaCO 3 , 1.5071gSnO 2 , 0.0374gTb 4 o 7 , 0.0088gEu 2 o 3 and 0.0309gH 3 BO 3 , mixed thoroughly and put into the crucible;
[0040] ②Calcinate at 1300°C for 5 hours in an air atmosphere;
[0041] ③ Cool, take out and grind.
[0042] The body color of the material is light yellow long afterglow phosphor, after 5 minutes of ultraviolet light irradiation, it will produce yellow-green long afterglow, the wavelength range is 500nm ~ 600nm, and the afterglow time is 3h.
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Abstract
The invention relates to a color-controllable long afterglow material excited by ultraviolet light and a preparation method thereof. The material has the following structural formula: CaSnO3: xTb3 +, yEu3 +, wherein the number of moles of x is 0.001 to 0.03, and the number of moles of y is 0.005 to 0.10. The experiments show that the afterglow decay time is 1 to 5h. After the long afterglow phosphor powder is irradiated by ultraviolet light, a white long afterglow material, or afterglow materials of different colors with green to red spectra, can be prepared by adjusting the doping concentration of rare earth ion. The afterglow material can be used for the display field, a photosensitizer can be excited by red afterglow, the excited-state photosensitizer can transfer energy to the surrounding oxygen to generate singlet oxygen, and further, an oxidation reaction between the oxygen and neighboring biological macromolecules is undergone to generate cytotoxicity role for biomedical treatment.
Description
technical field [0001] The invention relates to a long afterglow material excited by ultraviolet light, in particular to a long afterglow material with controllable color excited by ultraviolet light. Background technique [0002] Long afterglow material is a kind of material that can store energy when it is excited, and can continue to emit light after the excitation stops. It is a kind of energy storage and energy-saving luminescent material. Long afterglow materials and their products are widely used in many aspects such as military industry and daily life. In recent years, the application of long afterglow materials has gradually expanded to information storage, high-energy ray detection and other fields. The broad and huge application value of long afterglow materials has attracted people's extensive research interest for many years. Long afterglow materials, as confidential energy storage display materials, should have broad application prospects in display, military...
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