Nanometer strontium aluminate long-afterglow luminescent materials and preparation method thereof

A luminescent material and nano-aluminum technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of impure products, small size, serious light scattering, etc., and achieve the effects of easy industrial application, simple production process and rich sources.

Inactive Publication Date: 2010-10-06
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are deficiencies in this method. First, the product is not pure, and the resulting product is SrAl 2 o 4 and Sr 4 Al 14 o 25 Mixture, which will cause impurity in product color and limit its application field
Secondly, the size of the prepared product is small (less than 100nm), and the light scattering phenomenon will be very serious, which is not conducive to the effective use of excitation light.

Method used

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  • Nanometer strontium aluminate long-afterglow luminescent materials and preparation method thereof
  • Nanometer strontium aluminate long-afterglow luminescent materials and preparation method thereof
  • Nanometer strontium aluminate long-afterglow luminescent materials and preparation method thereof

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Embodiment 1

[0031] Long afterglow SrAl 2 o 4 :Eu 2+ , Dy 3+ The preparation process of nanosheet bundle precursor and single crystal nanosheet is as follows, 5 mmol of Sr(NO 3 ) 2 , 10mmol of Al(NO 3 ) 3 9H 2 O, 50 mmol CO(NH 2 ) 2 Dissolve in a beaker filled with 80mL of distilled water, and after magnetic stirring for 5 minutes, add 200μL of Eu(NO 3 ) 3 (0.5M) and 200μL Dy(NO 3 ) 3 (0.5M), after magnetic stirring for 20 minutes, the resulting white suspension was transferred to a 170mL polytetrafluoroethylene-lined stainless steel reaction kettle, sealed and heated at 160°C for 24 hours. After the kettle was cooled to room temperature, A white fluffy product was obtained by centrifugation, washed several times with distilled water and absolute ethanol, and then the white fluffy product was dried at 60° C. under vacuum for 6 hours. available as figure 1 nanosheet bundle precursors. Disperse the obtained precursor in water, add H with a mass fraction of 30% of the precursor...

Embodiment 2

[0034] Long afterglow Sr 0.99 al 2 o 4 :Eu 2+ 0.005 , Dy 3+ 0.005 The preparation process of nanosheet bundle precursor and single crystal nanosheet is as follows, 5 mmol of Sr(NO 3 ) 2 , 10mmol of Al(NO 3 ) 3 9H 2 O, 50 mmol CO(NH 2 ) 2 Dissolve in a beaker filled with 80mL of distilled water, stir magnetically for 5 minutes, then add 50μL of Eu(NO 3 ) 3 (0.5M) and 50μLDy(NO 3 ) 3 (0.5M), after magnetic stirring for 20 minutes, the resulting white suspension was transferred to a 170mL polytetrafluoroethylene-lined stainless steel reaction kettle, sealed and heated at 160°C for 24 hours. After the kettle was cooled to room temperature, A white fluffy product was obtained by centrifugation, washed several times with distilled water and absolute ethanol, and then the white fluffy product was dried at 60° C. under vacuum for 6 hours. Nanosheet bundle precursors are available. Disperse the obtained precursor in water, add H with a mass fraction of 30% of the precu...

Embodiment 3

[0036] Long afterglow Sr 0.90 al 2 o 4 :Eu 2+ 0.05 , Dy 3+ 0.05 The preparation process of nanosheet bundle precursor and single crystal nanosheet is as follows, 5 mmol of Sr(NO 3 ) 2 , 10mmol of Al(NO 3 ) 3 9H 2 O, 50 mmol CO(NH 2 ) 2 Dissolve in a beaker filled with 80mL of distilled water, stir magnetically for 5 minutes, then add 500μL of Eu(NO 3 ) 3 (0.5M) and 500μL Dy(NO 3 ) 3 (0.5M), after magnetic stirring for 20 minutes, the resulting white suspension was transferred to a 170mL polytetrafluoroethylene-lined stainless steel reaction kettle, sealed and heated at 160°C for 24 hours. After the kettle was cooled to room temperature, A white fluffy product was obtained by centrifugation, washed several times with distilled water and absolute ethanol, and then the white fluffy product was dried at 60° C. under vacuum for 6 hours. Nanosheet bundle precursors are available. Disperse the obtained precursor in water, add H with a mass fraction of 30% of the prec...

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Abstract

The invention discloses nanometer strontium aluminate long-afterglow luminescent materials and a preparation method thereof. The chemical formula of the luminescent materials is Sr(1-x)Al2O4:Eum2+,Dyn3+, wherein m plus n equals x; x is between 0.01 and 0.10; m is between 0.005 and 0.095; and n is between 0.005 and 0.095. Products in the invention have the advantages of pure phase, capability of emitting green-yellow light, few light scattering phenomenon, high nanometer fluorescence intensity, simple preparation and production process, high efficiency and low cost; all raw materials used in the invention are free from special requirements and rich in sources; all soluble salts can be alternately used; and the preparation process can be carried out flexibly and is easy for industrial application.

Description

technical field [0001] The present invention relates to a nanoscale long afterglow material and its preparation method, in particular to a nanoscale strontium aluminate long afterglow luminescent material and its preparation method, especially to SrAl 2 o 4 :Eu 2+ , Dy 3+ A preparation method for a nanosheet bundle precursor and a single crystal nanosheet material. Background technique [0002] SrAl 2 o 4 :Eu 2+ , Dy 3+ It is the second generation light-storing luminescent material, which has the advantages of high quantum efficiency, high brightness, long service life, good chemical stability and no radioactivity, etc. It has been widely used in transportation, architectural decoration, fire emergency, military facilities, daily consumer goods etc. Since 1993 there have been related SrAl 2 o 4 :Eu 2+ , Dy 3+ Literature and patents on preparation and application. However, the materials prepared according to these methods have disadvantages such as excessively la...

Claims

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Application Information

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IPC IPC(8): C09K11/64
Inventor 马德琨黄少铭王舜刘森森许迎峰潘钦权
Owner WENZHOU UNIVERSITY
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