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Metal-nanoparticle-doped oxide luminescent material with hollow structure and preparation method thereof

A metal nanoparticle and hollow structure technology, which is applied in the field of oxide luminescent materials doped with metal particles and its preparation, can solve the problems of low luminous efficiency and attenuation, and achieve the effects of industrial production, simple operation, and low preparation temperature

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

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Problems solved by technology

Especially at 1.5kV voltage, existing luminescent materials for FED, such as Y 2 o 3 :Eu 3+ Oxide red luminescent materials have low luminous efficiency and serious attenuation. How to improve their luminous efficiency under low pressure is of great significance
The existing field emission oxide luminescent materials prepared by wet method or solid phase method still need to be further improved in terms of morphology and luminous brightness.

Method used

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  • Metal-nanoparticle-doped oxide luminescent material with hollow structure and preparation method thereof
  • Metal-nanoparticle-doped oxide luminescent material with hollow structure and preparation method thereof
  • Metal-nanoparticle-doped oxide luminescent material with hollow structure and preparation method thereof

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preparation example Construction

[0031] A method for preparing a hollow structure oxide luminescent material doped with metal nanoparticles, such as image 3 shown, including the following steps:

[0032] S1, according to the chemical formula nM:yCLn 2-x Eu x o 3 The stoichiometric ratio of each element in, weigh the nanoparticles of M, the raw material of C, the source compound of Ln and the source compound of Eu; wherein, M is one of Ag, Au, Pt, Pd, Cu nanoparticles, and Ln is One of Gd, Y, La, Lu, C is carbon spheres, the value range of x is 02-x Eu x o 3 The molar ratio of n is 0-3 , y is C and Ln 2-x Eu x o 3 The molar ratio of y, the value of y is 0<y≤1;

[0033]S2. Add the nanoparticles of M to an aqueous solution containing polyvinylpyrrolidone (PVP, the same below) surface treatment agent for surface treatment, then add the raw material of C after ultrasonic dispersion treatment, and stir to obtain a mixed solution;

[0034] S3. After adjusting the pH value of the mixed solution to 2-3, add ...

Embodiment 1

[0047] Embodiment 1 prepares 5 * 10 -5 Au:CGd 1.99 Eu 0.01 o 3 Luminescent material

[0048] Weigh 1g of PVP and dissolve it in 5mL of deionized water, then add 0.25ml to it to a concentration of 1×10 -3 mol / L metal Au nanoparticles, magnetically stirred for 24 hours, ready for use;

[0049] Weigh 15 mg of the prepared carbon pellets, ultrasonically separate them for 15 minutes, mix the above-mentioned surface-treated metal Au solution with this solution, and stir evenly;

[0050] Use nitric acid solution to adjust the pH value of the above solution to 2-3, and then add 0.5mol / L Gd to the above solution according to the stoichiometric ratio 3+ Ion 19.9ml, 0.5mol / L Eu 3+ Ion 0.1ml, stir evenly, slowly add 18ml of oxalic acid solution with a concentration of 1mol / L (20% excess molar ratio), gradually form a white precipitate, use ammonia water to adjust the pH to 8-9, continue to stir for 3h, age and filter , washing, and drying to obtain the precursor.

[0051] The prec...

Embodiment 2

[0052] Embodiment 2 prepares 5 * 10 -4 Ag:CGd 1.9 Eu 0.1 o 3 Luminescent material

[0053] Weigh 1g of PVP and dissolve it in 5mL of deionized water, then add 2.5ml to it to a concentration of 1×10 -3 mol / L metal Ag nanoparticles, magnetic stirring for 24h;

[0054] Weigh 30 mg of prepared carbon pellets, ultrasonically separate them for 15 minutes, mix the above-mentioned surface-treated metal Ag solution with this solution, and stir evenly;

[0055] Use nitric acid solution to adjust the pH value of the above solution to 2-3, and then add 0.5mol / L Gd to the above solution according to the stoichiometric ratio 3+ Ion 19ml, 0.5mol / L Eu 3+ 1ml of ions, stir evenly, slowly add 18ml of oxalic acid solution with a concentration of 1mol / L (20% excess molar ratio), and gradually form a white precipitate, adjust the pH value to 8-9 with ammonia water, continue stirring for 3h, age, filter, Wash and dry to obtain the precursor.

[0056] The precursor was calcined at 800°C for ...

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Abstract

The invention belongs to the field of a luminescent material and discloses a metal-nanoparticle-doped oxide luminescent material with a hollow structure and a preparation method thereof. The chemical formula of the oxide luminescent material is nM:yC@Ln2-xEuxO3; wherein M is one type of Ag, Au, Pt, Pd and Cu nano-particles, Ln is one of Gd, Y, La and Lu, C is a small carbon ball, x is greater than 0 but less than or equal to 1.5, n is the molar ratio of M nanoparticles to Ln2-xEuxO3 and is greater than 0 but less than or equal to 1*10-3, y is the molar ratio of C to Ln2-xEuxO3 and is greater than 0 but less than or equal to 1, @ means coating, Ln2-xEuxO3 is a shell, nM is a core, and nM:yC is of a hollow structure. The prepared oxide luminescent material has excellent luminescent performance. The preparation method has the advantages that the operation is simple, no pollution can be caused, the process conditions are simple and can be easily controlled, the preparation temperature is low and the like, energy can be saved, and industrial production can be facilitated.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to an oxide luminescent material doped with metal particles for a field emitter and a preparation method thereof. Background technique [0002] According to the relatively low operating voltage (200V-5kV) of the field emission device (FED), in terms of the field emission device (FED), the commercial Y 2 o 3 :Eu 3+ Oxide red luminescent material. [0003] However, in order to obtain the potential advantages of FED in terms of brightness, viewing angle, and response time, there are a series of requirements for the brightness, luminous color, luminous brightness saturation, conductivity, stability, life, luminous efficiency, and morphology of luminescent materials. Require. Especially at 1.5kV voltage, existing luminescent materials for FED, such as Y 2 o 3 :Eu 3+ Oxide red luminescent materials have low luminous efficiency and serious attenuation. How to improve their lumin...

Claims

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Application Information

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IPC IPC(8): C09K11/87C09K11/78
Inventor 周明杰梁小芳马文波
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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