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Ultraviolet fluorescence up-conversion material and preparation method and application thereof

A conversion material and fluorescence technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of weak luminescence, low up-conversion efficiency, and restrictions on the practical application of rare-earth-doped up-conversion materials, and achieve cheap raw materials and simple synthesis methods Effect

Pending Publication Date: 2022-04-12
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the existing rare earth up-conversion materials such as Y 2 SiO 5 :Pr 3+ , Lu 7 o 6 f 9 :Pr 3+ Such deep ultraviolet luminescence is weak and the upconversion efficiency is low, which greatly limits the practical application of rare earth doped upconversion materials

Method used

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  • Ultraviolet fluorescence up-conversion material and preparation method and application thereof
  • Ultraviolet fluorescence up-conversion material and preparation method and application thereof
  • Ultraviolet fluorescence up-conversion material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] 0.2g Y 2 o 3 with 0.25g NH 4 Cl mixed and ground evenly, add 0.01g Li 2 CO 3 Continue grinding and mixing with 0.05g KCl, then add 0.0029g Pr 2 o 3 Continue to grind and mix evenly to obtain mixed powder. Mix the powder in 95%Ar-5%H 2 In a reducing atmosphere, the temperature was raised from room temperature to 200°C at a rate of 5°C / min for 1 hour, the temperature was raised to 500°C at a rate of 5°C / min for 1 hour, and the temperature was raised to 720°C for 1 hour at a rate of 5°C / min. UV Fluorescence Upconversion Material YOCl:Pr 3+ .

[0051] The ultraviolet fluorescent up-conversion material YOCl:Pr that this embodiment prepares 3+ The upconversion luminescence under the excitation of 450nm wavelength is as follows figure 2 shown.

[0052] The ultraviolet fluorescent up-conversion material YOCl:Pr prepared in this embodiment 3+ The X-ray diffraction patterns and scanning electron microscope pictures are as follows image 3 , Figure 4 As shown, it c...

Embodiment 2

[0054] 0.2g Y 2 o 3 with 0.3g NH 4 Mix and grind Br evenly, add 0.008g Li 2 CO 3 Continue grinding and mixing with 0.05g KBr, then add 0.0029g Pr 2 o 3 Continue to grind and mix evenly to obtain mixed powder. Mix the powder in 95%Ar-5%H 2 In a reducing atmosphere, the temperature was raised from room temperature to 240°C at a rate of 10°C / min for 1 hour, the rate was raised to 380°C for 1 hour at a rate of 5°C / min, and the temperature was raised to 650°C for 1 hour at a rate of 5°C / min. Ultraviolet Fluorescence Upconversion Material YOBr:Pr 3+ .

[0055] The ultraviolet fluorescent up-conversion material YOBr that this embodiment prepares: Pr 3+ The upconversion luminescence under the excitation of 450nm wavelength is as follows figure 2 shown.

[0056] The ultraviolet fluorescent up-conversion material YOBr:Pr prepared in this embodiment 3+ The X-ray diffraction patterns and scanning electron microscope pictures are as follows Figure 5 , Image 6 As shown, it ...

Embodiment 3

[0058] 0.3g Lu 2 o 3 with 0.3g NH 4 Mix and grind Br evenly, add 0.008g Li 2 CO 3 Continue grinding and mixing with 0.05g KBr, then add 0.0024g Pr 2 o 3 Continue to grind and mix evenly to obtain mixed powder. Mix the powder in 95%Ar-5%H 2 In a reducing atmosphere, the temperature was raised from room temperature to 300°C at a rate of 10°C / min for 1 hour, the rate was raised to 500°C for 1 hour at a rate of 5°C / min, and the temperature was raised to 830°C for 1 hour at a rate of 5°C / min. UV Fluorescence Upconversion Material LuOBr:Pr 3+ .

[0059] The ultraviolet fluorescent up-conversion material LuOBr that this embodiment prepares: Pr 3+ The upconversion luminescence under the excitation of 450nm wavelength is as follows figure 2 shown.

[0060] The ultraviolet fluorescent up-conversion material LuOBr that this embodiment prepares: Pr 3+ The X-ray diffraction pattern of Figure 7 shown by Figure 7 It can be seen that the ultraviolet fluorescent up-conversion ...

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Abstract

The invention discloses an ultraviolet fluorescent upconversion material as well as a preparation method and application thereof, and belongs to the field of upconversion fluorescent materials. The ultraviolet fluorescence up-conversion material takes rare earth oxyhalide as a matrix and praseodymium ions as an activating agent; the rare earth oxyhalide is of a tetragonal phase structure. Up-conversion luminescence of the prepared ultraviolet fluorescence up-conversion material has a real intermediate energy level, up-conversion luminescence can be realized under moderate excitation power density, and high-power-density pulse laser excitation is not needed. By doping praseodymium ions, a rare earth element R and halogen X in a rare earth oxyhalide (ROX) matrix are changed, the rare earth oxyhalide (ROX) matrix is limited to be of a tetragonal phase structure, and efficient up-conversion deep ultraviolet light emission is obtained. A solid-phase method is adopted for synthesis, and the synthesis method is simple.

Description

technical field [0001] The invention relates to the field of up-conversion fluorescent materials, in particular to an ultraviolet fluorescent up-conversion material and its preparation method and application. Background technique [0002] Deep ultraviolet fluorescence has the advantages of short wavelength and high energy, and has broad applications in the fields of photocatalytic water splitting, ultraviolet lasers, and ultraviolet biological sterilization. However, the generation of deep ultraviolet light depends on high-quality fluorescent materials and consumes a large amount of energy input. In recent years, the use of visible light in sunlight to generate ultraviolet light through optical upconversion has become a feasible technical means. [0003] The current technologies for converting visible light into ultraviolet light mainly include optical nonlinear frequency doubling, two-photon absorption, lanthanide ion upconversion and organic two-photon annihilation. The ...

Claims

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Application Information

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IPC IPC(8): C09K11/86
CPCY02E60/36
Inventor 陈献杜阳阳李滋钰王港王琦鑫
Owner SHENZHEN UNIV
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