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Anti-hardening special-shaped composite luminescent powder and preparation method thereof

A luminescent powder and anti-hardening technology, which is applied in the field of nanomaterials, can solve the problems of unsatisfactory luminescence and afterglow performance of luminescent nanoparticles, difficulties in the preparation of monodisperse nanoparticles, etc., and achieve excellent luminescence performance, low cost, and reduced contact area. Effect

Active Publication Date: 2020-04-10
SUZHOU NANO FOREVER MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing technology is not enough to solve the serious agglomeration phenomenon of luminescent nanoparticles during the preparation process, and the luminescence and afterglow properties of the prepared luminescent nanoparticles are not ideal.
For example, in the preparation of rare earth long-lasting luminescent nanomaterials with high luminous efficiency, the preparation of monodisperse nanoparticles is very difficult due to the agglomeration and hardening of materials during the sintering process.

Method used

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  • Anti-hardening special-shaped composite luminescent powder and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0023] (1) Molar ratio of TEOS: P123: HCl: H 2 O: EtOH=1:0.14:5.0:110:11 Prepare the mesoporous silica precursor solution, add non-ionic surfactant P123 in the mixed solution of 60ml ethanol and water according to the above ratio and adjust the pH value with hydrochloric acid, After uniform stirring, TEOS was added dropwise to obtain a clear and transparent silica precursor solution;

[0024] (2) Add 10 ml of a mixture aqueous solution of strontium nitrate, magnesium nitrate, europium nitrate, and dysprosium nitrate to the above-mentioned silicon dioxide precursor solution, wherein the mass content of strontium nitrate is 0.06, strontium nitrate: magnesium nitrate: europium nitrate: dysprosium nitrate The mass ratio is 100:10:1:2, after stirring evenly, add 0.0125TEOS equivalent of palmitic acid and diacetone alcohol as a composite solvent, transfer the above solution to a tetrafluoroethylene high-pressure reactor, and react at a constant temperature of 140°C for 12h. Obtain ...

Embodiment 2

[0028] (1) Molar ratio of TEOS: P123: HCl: H 2 O: EtOH=1:2.05:5.0:110:11 Prepare the mesoporous silica precursor solution, add non-ionic surfactant P123 in the mixed solution of 60ml ethanol and water according to the above ratio and adjust the pH value with hydrochloric acid, After uniform stirring, TEOS was added dropwise to obtain a clear and transparent silica precursor solution;

[0029] (2) Add 10 ml of a mixture aqueous solution of strontium nitrate, magnesium nitrate, europium nitrate, and dysprosium nitrate to the above-mentioned silicon dioxide precursor solution, wherein the mass content of strontium nitrate is 0.06, strontium nitrate: magnesium nitrate: europium nitrate: dysprosium nitrate The mass ratio is 80:40:1:2, after stirring evenly, add 0.2TEOS equivalent of palmitic acid and diacetone alcohol as a composite solvent, transfer the above solution to a tetrafluoroethylene autoclave, and react at a constant temperature of 160°C for 24 hours. Obtain the precurs...

Embodiment 3

[0032] (1) Molar ratio of TEOS: P123: HCl: H 2 O: EtOH=1:0.44:0.25:110:22 Prepare the mesoporous silica precursor solution, add nonionic surfactant P123 in the mixed solution of 60ml ethanol and water according to the above ratio and adjust the pH value with hydrochloric acid, After uniform stirring, TEOS was added dropwise to obtain a clear and transparent silica precursor solution;

[0033] (2) Add 15 ml of a mixture aqueous solution of strontium nitrate, magnesium nitrate, europium nitrate, and dysprosium nitrate to the above-mentioned silicon dioxide precursor solution, wherein the mass content of strontium nitrate is 0.09, strontium nitrate: magnesium nitrate: europium nitrate: dysprosium nitrate The mass ratio is 100:20:1:2, after stirring evenly, add a composite solvent of palmitic acid and diacetone alcohol equivalent to 0.1TEOS, transfer the above solution to a tetrafluoroethylene autoclave, and react at a constant temperature of 150°C for 13h. Obtain the precursor o...

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Abstract

The invention discloses an abnormal-shape compound luminescent powder capable of resisting hardening. The precursor of long persistent luminescent power and a mesoporous silica precursor are subjected to co-assembling through a one-step method under a hydrothermal condition, a mesoporous silica material is taken as a template, the compound luminescent power is prepared in the inner limited range of the pore canal of the template, the compound solvent of palmitic acid and diacetone alcohol is used for regulating and controlling system surface tension so as to control the morphology of the mesoporous silica, reduce a contact area among luminescent powder particles and alleviate even avoid a hardening phenomenon in a calcining process, and the luminescent powder particles can be more dispersed so as to prepare the compound luminescent powder capable of resisting hardening with an excellent luminescent performance. The method has the advantages of simple preparation technology, low cost and universality. The compound luminescent powder capable of resisting hardening can quickly absorb sunlight and slowly release the sunlight under the irradiation of natural light, and can be used for illumination, emergency indication and the like under a special environment.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a special-shaped anti-boarding composite luminescent powder and a preparation method thereof. Background technique [0002] Long afterglow luminescent material is a "green" light source material, that is, it stores light radiation energy under the irradiation of natural light or artificial light source. When the light source is cut off, it can still release the stored energy in the form of visible light, showing bright and recognizable light. , is an ideal emergency light source. After hundreds of years of development, long afterglow materials have formed their own system, emerging in various fields with their own unique "charm", especially showing broad application prospects in new fields such as biological imaging. At present, the methods for preparing rare earth long-lasting luminescent materials mainly include combustion method, sol-gel method, chemic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/79B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C09K11/025C09K11/7792
Inventor 窦仁美温强叶常青周京西贾亮罗开元宋延林
Owner SUZHOU NANO FOREVER MATERIAL TECH