Rare earth ions doped fluoride matrix visible-ultraviolet upconversion luminescence material, preparation method therefor and application thereof

A technology of rare earth ions and luminescent materials, applied in luminescent materials, chemical instruments and methods, irradiation, etc., can solve the problems of safety, hidden dangers, and inability to sterilize applications caused by operators, and achieve lower sterilization costs, low prices, and sterilization. or the effect of inhibiting bacterial growth

Active Publication Date: 2015-09-23
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a fluoride-based rare earth ion-doped visible-ultraviolet up-conversion luminescent material and its preparation method and application, to solve the problem that the existing up-conversion luminescent material for sterilization generally uses laser as the excitation source, which not only gives Operators bring safety hazards and cannot be applied in large-scale sterilization

Method used

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  • Rare earth ions doped fluoride matrix visible-ultraviolet upconversion luminescence material, preparation method therefor and application thereof
  • Rare earth ions doped fluoride matrix visible-ultraviolet upconversion luminescence material, preparation method therefor and application thereof
  • Rare earth ions doped fluoride matrix visible-ultraviolet upconversion luminescence material, preparation method therefor and application thereof

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Embodiment 1

[0030] Lithium carbonate, yttrium oxide, praseodymium oxide, and ammonium fluoride were weighed according to the molar ratio of yttrium:praseodymium:lithium:fluorine=0.98:0.02:1:4. After the raw materials were ground, they were fired at 900°C for 2 hours and cooled to room temperature. Take it out and grind it again to obtain the sample powder fluoride-based rare earth visible-ultraviolet up-conversion luminescent material.

Embodiment 2

[0032] Lithium carbonate, yttrium oxide, praseodymium oxide, and ammonium fluoride were weighed according to the molar ratio of yttrium:praseodymium:lithium:fluorine=0.98:0.02:1:4. After the raw materials were ground, they were fired at 700°C for 4 hours and cooled down to room temperature. Take it out and grind it again to obtain the sample powder fluoride-based rare earth visible-ultraviolet up-conversion luminescent material.

Embodiment 3

[0034] Lithium carbonate, yttrium oxide, praseodymium oxide, and ammonium fluoride were weighed according to the molar ratio of yttrium:praseodymium:lithium:fluorine=0.98:0.02:1:4. After the raw materials were ground, they were fired at 1000°C for 1.5 hours and cooled to room temperature. Take it out and grind it again to obtain the sample powder fluoride-based rare earth visible-ultraviolet up-conversion luminescent material.

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Abstract

The invention discloses a rare earth ions doped fluoride matrix visible-ultraviolet upconversion luminescence material. In the material, fluoride acts as a matrix, Pr3+ is doped in the matrix material, and the molar ratio of elements is: fluoride:Pr3+ = 0.7-0.99:0.01-0.1. In addition, the invention further provides a preparation process of the material. The preparation process comprises: (a), according to the chemical formula, precisely weighing out a carbonate material or an oxide material of the corresponding element and ammonium biphosphate in accordance with the stoichiometric ratio; and (b) grinding the material into powder, burning the material at the temperature of 700-1,000 DEG C for 1.5-4 h, cooling the material to the room temperature, and grinding the material to obtain a powdery upconversion luminescence material. It is experimentally proved that the material, when excited by a common light source (such as an incandescent lamp, an xenon lamp, a fluorescent lamp, or an LED lamp) or especially sunlight, can emit UVC ultraviolet light capable of effectively killing bacteria. The material has better application prospects concerning food safety and environmental protection.

Description

technical field [0001] The invention relates to a luminescent material and its preparation method and application, in particular to a fluoride-based rare earth ion doped visible-ultraviolet up-conversion luminescent material and its preparation method and application. Background technique [0002] Ultraviolet sterilization technology has been gradually applied in the field of sewage and industrial disinfection since the 1970s. In the 1990s, with the breakthrough of key technologies, and because of its unique environmental protection and clean characteristics, it has been widely used in European and American countries. Ultraviolet light is a kind of light wave invisible to the naked eye, which exists on the outside of the ultraviolet ray end of the spectrum, which can destroy the molecular structure of DNA (deoxyribonucleic acid) or RNA (ribonucleic acid) in the cells of microorganisms, causing growth cell death and (or ) regenerative cell death, to achieve the effect of ste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85A61L2/10
Inventor 杨艳民张伟吴建红
Owner HEBEI UNIVERSITY
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