Nanometer red long-afterglow luminescent material and preparation method thereof

A long-lasting luminescence and red technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., to achieve wide application prospects, improve regularity, and reduce the effect of preparation processes

Inactive Publication Date: 2012-12-19
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report at home and abroad on the preparation of yttrium oxysulfide nano-hollow spheres without templates. Therefore, the development of template-free preparation of yttrium oxysulfide red long-lasting luminescent materials with nano-hollow spheres is not only important for promoting the optical properties of nanomaterials. The research has important theoretical significance, and has very important practical significance for saving energy and further developing my country's rare earth resources

Method used

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  • Nanometer red long-afterglow luminescent material and preparation method thereof
  • Nanometer red long-afterglow luminescent material and preparation method thereof
  • Nanometer red long-afterglow luminescent material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) According to the molar ratio of yttrium nitrate: samarium nitrate: thiourea: PVP: ethylene glycol = 2: 0.01: 6: 0.05: 40, measure 40 mL of yttrium nitrate solution (0.5mol / L), samarium nitrate solution (0.05 mol / L) 2mL, ethylene glycol 250mL, weigh 4.57g of thiourea, 20g of PVP, put them in a container and stir to dissolve, form a transparent solution, and keep it sealed at 120°C for 8 hours to obtain a brown product.

[0032] (2) Centrifuge the cooled tan product, filter and wash with deionized water for 3 times, then filter and wash with ethanol for 2 times, and dry at 60°C for 12 hours to obtain the following: figure 2 The curve a in image 3 A. Figure 4 Prebody shown in a.

[0033] (3) Anneal the precursor in a reducing atmosphere at 700°C for 2 hours. Wherein, the reducing atmosphere is formed by placing the graphite crucible with the precursor in a closed corundum crucible covered with 5g of reduced C powder and 3g of sulfur powder. figure 2 The curve f...

Embodiment 2

[0036] (1) According to the molar ratio of yttrium chloride: samarium chloride: thiourea: PVP: ethylene glycol = 2: 0.03: 7: 0.08: 50, measure 40 mL of yttrium chloride solution (0.5mol / L), and chlorinate Samarium solution (0.05mol / L) 6mL, ethylene glycol 300mL, weigh 5.33g of thiourea and 32g of PVP, put them in a container and stir to dissolve, form a transparent solution, keep it sealed at 140°C for 10 hours to obtain a brown color product.

[0037] (2) Centrifuge the cooled tan product, filter and wash with deionized water for 3 times and then with ethanol for 2 times, and dry at 60°C for 12 hours to obtain the precursor.

[0038] (3) Anneal the precursor in a reducing atmosphere at 800°C for 3 hours. Wherein, the reducing atmosphere is formed by placing the graphite crucible with the precursor in a closed corundum crucible covered with 5g of reduced C powder and 3g of sulfur powder. figure 2 The red nano long afterglow luminescent material shown in the curve e.

[003...

Embodiment 3

[0041] (1) According to the molar ratio of yttrium acetate: samarium acetate: thiourea: PVP: ethylene glycol = 2: 0.05: 8: 0.1: 60, measure 40 mL of yttrium acetate solution (0.5 mol / L), samarium acetate solution (0.05 mol / L) 10mL, ethylene glycol 350mL, weighed 6.09g of thiourea, 40g of PVP, placed in a container and stirred to dissolve, formed a transparent solution, and kept it sealed at 160°C for 12 hours to obtain a brown product.

[0042] (2) Centrifuge the cooled tan product, filter and wash with deionized water for 3 times and then with ethanol for 2 times, and dry at 70°C for 10 hours to obtain the precursor.

[0043] (3) Anneal the precursor in a reducing atmosphere at 900°C for 2 hours. Wherein, the reducing atmosphere is formed by placing the graphite crucible with the precursor in a closed corundum crucible covered with 5g of reduced C powder and 3g of sulfur powder. figure 2 The curve d in image 3 The red nano long afterglow luminescent material shown in C. ...

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Abstract

The invention discloses a nanometer red long-afterglow luminescent material and a preparation method of the nanometer red long-afterglow luminescent material, belonging to the technical field of nanometer luminescent materials. The chemical formula of the material is Y202S: xSm<3+> and x=0.01-0.08; the preparation method comprises the following steps: weighing water soluble yttrium salt, water soluble samarium salt, thiocarbamide, a surfactant and ethylene glycol according to a molar ratio of 2:(0.03-0.08):(6-8):(0.05-0.1):(40-60); mixing the weighed materials for dissolution to obtain a solution; preserving the heat of the solution at a temperature from 100 DEG C to 200 DEG C in an enclosed state for 6-24 hours to obtain a brown product; cooling the brown product, filtering, washing and drying the cooled brown product to obtain a precursor; and annealing the precursor at a temperature from 600 DEG C to 1100 DEG C in a reducing atmosphere for 2-3 hours to obtain the needed product. The nanometer red long-afterglow luminescent material disclosed by the invention is good in dispersity, uniform in size and hollow in sphere structure and can be widely used for bioluminescent markers, drug release and transmission materials, light filling materials and the like.

Description

technical field [0001] The invention relates to the technical field of nano-luminescent materials, in particular to a nano-red long-lasting luminescent material and a preparation method thereof. Background technique [0002] The long afterglow luminous body activated by rare earth ions is a new generation of photoluminescent materials. Because of its characteristics of energy saving, corrosion resistance and no radioactivity, it is widely used in construction and decoration, transportation, military facilities, fire emergency, daily consumer goods and other fields. broad application prospects. Among them, the red yttrium oxysulfide long afterglow material, which can emit a striking red afterglow in the dark, has particularly practical application value and has always been the focus of researchers' attention and development. For example, the prior art discloses a chemical composition as Y 2 o 2 S: Rare-earth red long-lasting phosphors of Sm, Mg, Ti. Using the traditional ...

Claims

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Application Information

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IPC IPC(8): C09K11/84
Inventor 刘应亮邓苏青薛志萍雷炳富刘晓瑭肖勇郑明涛
Owner SOUTH CHINA AGRI UNIV
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