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Samarium-doped hollow-structure Sr2CeO4 luminescent material and preparation method thereof

A technology of luminescent materials and hollow structures, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of low luminous intensity of phosphor powder, inconsistent powder particle size, uneven particle distribution, etc., achieving low cost and not harsh process conditions , the effect of fewer process steps

Inactive Publication Date: 2014-10-29
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] High energy consumption, uneven particle distribution, and various powder shapes require ball milling to obtain phosphors with a particle size of 2-8 microns, and the particle size of the powder is inconsistent and the shape is incomplete, resulting in incomplete coating. all
People prepare phosphors by using sol-gel method, hydrothermal synthesis method, complex gel method and other methods. These methods can make up for the deficiency of high-temperature solid-phase synthesis method, but the luminous intensity of phosphor powder obtained by these methods is not as high as high temperature solid phase synthesis

Method used

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  • Samarium-doped hollow-structure Sr2CeO4 luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of Hollow Spherical Sr by Precipitation Method 1.995 CeO 4 :Sm 0.005 3+ :

[0029] Weigh 4g of glucose and dissolve it in absolute ethanol to make the solution volume 40mL, then transfer the solution into a 50mL reaction kettle with a polytetrafluoroethylene liner, cover and tighten it, and react at 120°C for 36h to prepare carbon The bead solution was washed several times with deionized water and absolute ethanol, centrifuged, and dried at 60°C to obtain carbon bead C coated with metal nanoparticles for use;

[0030] Take by weighing 10.3630g SrO and dissolve in nitric acid to obtain 100mL1mol / L of Sr(NO 3 ) 2 Solution; Weigh 17.2120g CeO 2 Dissolved in nitric acid to obtain 100mL1mol / L Ce(NO 3 ) 3 solution; weigh 0.0872g Sm 2 o 3 Dissolved in nitric acid to obtain 100mL0.005mol / L of Sm(NO 3 ) 3 solution.

[0031] According to Sr 1.995 CeO 4 :Sm 0.005 3+ stoichiometric ratio, pipette 7.98mL1mol / L Y(NO 3 ) 3 , 4mL1mol / L Ce(NO 3 ) 3 and 4mL...

Embodiment 2

[0034] Preparation of Hollow Spherical Sr by Precipitation Method 1.9 CeO 4 :Sm 0.1 3+

[0035] Weigh 0.003g of glucose and dissolve it in absolute ethanol to obtain 40mL of glucitol solution, transfer this solution into a 50mL reaction kettle with a polytetrafluoroethylene liner, cover and tighten it, and react at 150°C for 10h to prepare carbon The bead solution was centrifuged to obtain a solid phase, washed twice with deionized water and absolute ethanol, and dried at 70°C to obtain carbon bead C.

[0036] According to Sr 1.9 CeO 4 :Sm 0.1 3+ stoichiometric ratio, pipette 15.2mL0.5mol / L Sr(CH 3 COO) 2 solution, 8mL0.5mol / L Ce(CH 3 COO) 3 solution and 0.2mL2mol / L Sm(CH 3 COO) 3 Solution, placed in a 100mL beaker to form a mixed solution, then weighed carbon pellets C0.6mg into the mixed solution, and stirred evenly. Under magnetic stirring, 10mL precipitant oxalic acid solution (2mol / L) was added dropwise, and the pH was adjusted to 10 by ammonia water. After ...

Embodiment 3

[0039] Preparation of Hollow Spherical Sr by Precipitation Method 1.99 CeO 4 :Sm 0.01 3+

[0040] Weigh 5g of glucose and dissolve it in absolute ethanol to obtain 40mL of glucitol solution, transfer this solution into a 50mL reaction kettle with a polytetrafluoroethylene liner, cover it and tighten it, and react at 180°C for 24h to prepare carbon small The solution of the spheres was centrifuged to obtain a solid phase, washed twice with deionized water and absolute ethanol, and dried at 60°C to obtain carbon spheres C.

[0041] According to Sr 1.99 CeO 4 :Sm 0.01 3+ stoichiometric ratio, pipette 7.96mL1mol / L Sr(NO 3 ) 2 solution, 8mL0.5mol / L Ce(NO 3 ) 3 solution and 4mL0.01mol / L Sm(NO 3 ) 3 solution, placed in a 100mL beaker to form a nitric acid mixture, then weighed 120mg of carbon pellets C and added to the mixture, and stirred evenly. Under magnetic stirring, dropwise add 40mL precipitant oxalic acid solution (0.5mol / L), then adjust the pH to 9 with ammonia...

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Abstract

The invention belongs to the field of luminescent materials, and discloses a samarium-doped hollow-structure Sr2CeO4 luminescent material and a preparation method thereof. The chemical general formula of the luminescent material is Sr2-xCeO4:Smx<3+>, wherein x is the molar number of Sm<3+> replacing Sr ion, and 0<x<=0.2. According to the provided samarium-doped hollow-structure Sr2CeO4 luminescent material, dispersed carbon small spheres C are taken as a template, and the obtained Sr2CeO4 luminescent material has a spherical hollow structure, and is controllable in morphology and improved in luminescent efficiency.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a hollow structure Sr doped with samarium 2 CeO 4 Luminescent material and its preparation method. Background technique [0002] Most of the current commercial luminescent materials are prepared by high-temperature solid-phase method, high-temperature reaction [0003] High energy consumption, uneven particle distribution, and various powder shapes require ball milling to obtain phosphors with a particle size of 2-8 microns, and the particle size of the powder is inconsistent and the shape is incomplete, resulting in incomplete coating. all. People prepare phosphors by using sol-gel method, hydrothermal synthesis method, complex gel method and other methods. These methods can make up for the deficiency of high-temperature solid-phase synthesis method, but the luminous intensity of phosphor powder obtained by these methods is not as high as high temperature Solid Phase Syn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 周明杰王荣
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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