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Preparation method of europium-doped sodium gadolinium fluoride red light-emitting porous nanocrystal material

A technology of europium gadolinium fluoride sodium and nanocrystalline materials, which is applied in the field of rare earth europium ion-doped gadolinium sodium fluoride red light-emitting porous nanocrystalline materials and the preparation field, achieving the effect of simple preparation process and good monodispersity

Active Publication Date: 2015-02-18
江苏晶曌半导体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Guo Gao et al. used a one-step hydrothermal method and reacted at 320°C for 10 hours to obtain a NaYF4 porous microrod structure, which was about 3-5 μm in length, about 1 μm in diameter, and about 28.5 nm in pore size; However, under the same reaction conditions, the prepared NaGdF4 submicron crystals did not show a porous structure (Nanoscale, 2013, 5, 351)
So far, without adding any surfactant, the literature and patents of monodisperse porous nanocrystals based on NaGdF4 have not been published.

Method used

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  • Preparation method of europium-doped sodium gadolinium fluoride red light-emitting porous nanocrystal material
  • Preparation method of europium-doped sodium gadolinium fluoride red light-emitting porous nanocrystal material
  • Preparation method of europium-doped sodium gadolinium fluoride red light-emitting porous nanocrystal material

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Experimental program
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Effect test

Embodiment 1

[0036] The red light-emitting porous nanocrystalline material of europium-doped gadolinium fluoride sodium of the present invention comprises: NaGd 1-x Eu x f 4 ,in x = 5 mol %. Its concrete preparation steps are as follows:

[0037] 1) Measure 9.5 ml of Gd(NO 3 ) 3 solution (0.4 mol / L) and 1 ml of Eu(NO 3 ) 3Solution (0.2 mol / L concentration) was dissolved in 150 ml distilled water to obtain [Gd(NO 3 ) 3 +Eu(NO 3 ) 3 ] Mix the solution, take out 25 ml and keep it for later use. Add 3 g of urea to the mixed solution, heat at 90 °C for 2 h, and slowly form a white precipitate. The resulting white precipitate was centrifuged and washed once with distilled water, then transferred to a beaker, added 40 ml of distilled water, ultrasonically dispersed for 15 min, and then magnetically stirred for 0.5 h to obtain a white suspension A;

[0038] 2) Add 14 ml of NaF aqueous solution to the suspension A with a concentration of 2 mol / L, stir magnetically to fully mix the rea...

Embodiment 2

[0042] The red light-emitting porous nanocrystalline material of europium-doped gadolinium fluoride sodium of the present invention comprises: NaGd 1-x Eu x f 4 ,in x = 2 mol %. Its concrete preparation steps are as follows:

[0043] 1) Measure 9.8 ml of Gd(NO 3 ) 3 solution (0.4 mol / L) and 0.8 ml of Eu(NO 3 ) 3 Solution (0.1 mol / L concentration) was dissolved in 180 ml distilled water to obtain [Gd(NO 3 ) 3 +Eu(NO 3 ) 3 ] Mix the solution, take out 30 ml and keep it for later use. Add 3.5 g of urea to the mixed solution, heat at 90°C for 2.5 h, and slowly form a white precipitate. The resulting white precipitate was centrifuged and washed twice with distilled water, then transferred to a beaker, added 30 ml of distilled water, ultrasonically dispersed for 18 min, and then magnetically stirred for 0.5 h to obtain a white suspension A;

[0044] 2) Add 8 ml of NaF aqueous solution to the suspension A with a concentration of 4 mol / L, stir magnetically to fully mix t...

Embodiment 3

[0049] The red light-emitting porous nanocrystalline material of europium-doped gadolinium fluoride sodium of the present invention comprises: NaGd 1-x Eu x f 4 ,in x = 8 mol%. Its concrete preparation steps are as follows:

[0050] 1) Measure 9.2 ml of Gd(NO 3 ) 3 solution (0.4 mol / L) and 1.6 ml of Eu(NO 3 ) 3 Solution (0.2 mol / L concentration) was dissolved in 200 ml distilled water to obtain [Gd(NO 3 ) 3 +Eu(NO 3 ) 3 ] Mix the solution, take out 35 ml and keep it for later use. Add 4 g of urea to the mixed solution, heat at 90 °C for 3 h, and slowly form a white precipitate. The resulting white precipitate was centrifuged and washed once with distilled water, then transferred to a beaker, added 30 ml of distilled water, ultrasonically dispersed for 20 min, and then magnetically stirred for 0.5 h to obtain a white suspension A;

[0051] 2) Add 15 ml of NaF aqueous solution to suspension A with a concentration of 2 mol / L to fully mix the reactants to obtain whit...

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Abstract

The invention discloses a preparation method of a europium-doped sodium gadolinium fluoride red light-emitting porous nanocrystal material, relating to a light-emitting nano material of which the nominal composition is NaGd[1-x]EuxF4 (x=0-10mol%). The red light-emitting porous nanocrystal material has the advantages of favorable dispersity, controllable crystal form structure and shape, high fluorescence intensity, low rare-earth consumption due to porous structure, energy saving and the like. The preparation technique is simple and does not need any surfactant; and the whole reaction is carried out in the water solution without using any organic solvent, so the method is economical and environment-friendly and is convenient for industrial production.

Description

Technical field: [0001] [0002] Background technique: [0003] 4 4 4 4 4 [0004] 3+ 3+ 3+ 3+ 3+ 3+ 3+ 3+ 4 3+ 4 3+ 3+ 3+ 3+ [0005] 4 4 4 4 [0006] Invention content: [0007] [0008] [0009] [0010] 1-x x 4 x [0011] 3 Cure 3 3 Cure 3 3 Cure 3 3 Cure 3 3+ 3+ 3+ [0012] 3+ [0013] 3 Cure 3 3 Cure 3 [0014] [0015] [0016] 3 Cure 3 3 Cure 3 [0017] [0018] [0019] [0020] 3 Cure 3 3 Cure 3 - - [0021] [0022] 3+ 3+ [0023] [0024] Attachment description [0025] figure 1 [0026] figure 2 [0027] image 3 [0028] Figure 4 [0029] Figure 5 Detailed ways: [0030] [0031] Example 1: [0032] 1-x x 4 ,in x [0033] 3 Cure 3 3 Cure 3 3 Cure 3+Eu (no 3 Cure 3 ] Mixed solution, take out 25 mL for use.Add 3 g urea to the mixed solution and heat for 2 h at 90 ° C to form a white precipitation slowly.Settle the white sedimentary centrifugation, wash it with distilled water once, then transfer it to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85B82Y20/00B82Y40/00
Inventor 缪菊红苏静赖敏黄杰孙思明
Owner 江苏晶曌半导体有限公司
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