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Fluorescent material and preparation method thereof

A fluorescent material and fluorescent powder technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of low luminous efficiency and weak luminous performance

Inactive Publication Date: 2012-02-01
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the zinc-manganese silicate phosphor prepared by the traditional sol-gel method has weak luminous performance and low luminous efficiency.

Method used

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  • Fluorescent material and preparation method thereof
  • Fluorescent material and preparation method thereof
  • Fluorescent material and preparation method thereof

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preparation example Construction

[0022] The preparation process of the fluorescent material doped with metal nanoparticles includes the following steps:

[0023] 1. Preparation of sol containing metal nanoparticles:

[0024] 1) With water or ethanol as solvent, silver nitrate (AgNO 3 ), chloroauric acid (HAuCl 4 4H 2 O), chloroplatinic acid (H 2 PtCl 6 ·6H 2 O) or palladium chloride (PdCl 2 2H 2 O) is a solute, and is prepared with an oxidizing agent solution;

[0025] 2) using water or absolute ethanol as a solvent, and at least one of hydrazine hydrate, ascorbic acid, and sodium borohydride as a solute, to prepare a reducing agent solution;

[0026] 3) Under the state of magnetic stirring, one or more additives that play a stable dispersion role are dissolved in the above-mentioned 1) oxidant solution, and the content of the additives in the finally obtained metal nanoparticle sol is 5×10 -4 g / mL~4×10 -3 g / mL; preferred additives are polyvinylpyrrolidone (PVP), sodium citrate, cetyltrimethylammon...

Embodiment 1

[0037] 1. Preparation of Pt nanoparticle sol

[0038] Weigh 5.18mg chloroplatinic acid (H 2 PtCl 6 ·6H 2 O) be dissolved in the deionized water of 15.2mL; After chloroplatinic acid dissolves completely, take by weighing 8.0mg sodium citrate and 12.0mg sodium dodecylsulfonate, and dissolve into chloroplatinic acid aqueous solution under the environment of magnetic stirring Medium; Weigh 3.8mg of sodium borohydride and dissolve it in 10mL of deionized water to obtain a concentration of 1×10 in 10mL -2 mol / L sodium borohydride aqueous solution; under the environment of magnetic stirring, the ratio of the amount of the reducing agent to the metal ion substance is 4.8:1, add 4.8mL sodium borohydride aqueous solution dropwise to the chloroplatinic acid aqueous solution, and then continue Reaction for 45min, the content of 20mL Pt is 5×10 -4 mol / L Pt nanoparticle sol.

[0039] 2. Preparation of fluorescent materials doped with Pt nanoparticles

[0040] 1) Fully mix 3.6mL of dis...

Embodiment 2

[0043] 1. Preparation of Ag nanoparticles sol

[0044] Weigh 17.0mg silver nitrate (AgNO 3 ) into 17.4mL of deionized water; when the silver nitrate was completely dissolved, weigh 60mg of sodium citrate, and dissolve it in an aqueous solution of silver nitrate under magnetic stirring; weigh 19mg of sodium borohydride and dissolve it in 10mL of deionized water , to obtain a 10mL concentration of 5×10 -2 mol / L sodium borohydride aqueous solution; under the environment of magnetic stirring, according to the ratio of the amount of reducing agent and metal ion substance being 1.3:1, add 2.6mL5×10 to the silver nitrate aqueous solution at one time -2 mol / L sodium borohydride aqueous solution, and then continue to react for 30min to obtain 20mL silver content of 5×10 -3 mol / L Ag nanoparticle sol.

[0045] 2. Preparation of fluorescent materials doped with Ag nanoparticles

[0046] 1) Fully mix 6.0 mL of distilled water and 30 mL of absolute ethanol at a ratio of 1:5 by volume, a...

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Abstract

The invention relates to a fluorescent material and a preparation method thereof. The fluorescent material comprises a fluorescent powder main body and metallic nanoparticles doped in the fluorescent powder main body. The general formula of the fluorescent material is (Mn*Zn(1-x))2SiO4:M, wherein, M is at least one selected from the group consisting of Ag, Au, Pt and Pd nanoparticles, 0.02<=x<=0.15, and the mole ratio of M to the fluorescent powder main body (Mn*Zn(1-x))2SiO4:M is in a range of 3.73*10<-6> to 1.5*10<-3>. According to the invention, precious metallic nanoparticles are doped in zinc manganese silicate; surface plasma effects generated by the metallic nanoparticles are utilized to enhance the luminescent property of fluorescent powder; internal quantum effects generated by the metallic nanoparticles enable luminescent efficiency of fluorescent powder to be improved. The preparation method has the advantages of a simple process and low requirements for equipment; fluorescent powder prepared after the metallic nanoparticles are doped has a greatly improved luminescent property.

Description

【Technical field】 [0001] The invention relates to the technical field of photoelectric materials and lighting, in particular to a fluorescent material and a preparation method thereof. 【Background technique】 [0002] Zn 2 SiO 4 As a luminescent matrix, it has good chemical stability, strong environmental adaptability, good moisture resistance, easy preparation, and low price, so it has attracted much attention in the research of phosphors. In 1939, Jenkins and others discovered Zn through X-ray research. 2+ ions and Mn 2+ The ions have the same valence and close ionic radii, Mn 2+ Ions can be well distributed in Zn 2 SiO 4 lattice, thus Mn 2+ Can be easily incorporated into Zn 2 SiO 4 in the luminescent matrix. Zn 2 SiO 4 : Mn is a phosphor with excellent performance, high luminous brightness, good color purity, no near-infrared emission, and has been widely used in photoluminescence and cathodoluminescence. However, the zinc-manganese silicate phosphor prepared...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59
Inventor 周明杰陆树新马文波
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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