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Phosphate or metaphosphate based visible-ultraviolet up-conversion luminescence material doped with rare earth ions, and preparation method and application thereof

A technology of metaphosphate and rare earth ions, applied in luminescent materials, applications, chemical instruments and methods, etc., can solve problems such as hidden safety hazards for operators, inability to sterilize applications, etc., achieve low price, sterilization or inhibit bacterial growth, and reduce sterilization. cost effect

Inactive Publication Date: 2015-11-04
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • Phosphate or metaphosphate based visible-ultraviolet up-conversion luminescence material doped with rare earth ions, and preparation method and application thereof
  • Phosphate or metaphosphate based visible-ultraviolet up-conversion luminescence material doped with rare earth ions, and preparation method and application thereof
  • Phosphate or metaphosphate based visible-ultraviolet up-conversion luminescence material doped with rare earth ions, and preparation method and application thereof

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Embodiment 1

[0034] Weigh yttrium oxide, praseodymium oxide and ammonium dihydrogen phosphate according to the molar ratio of each element yttrium:praseodymium:phosphorus=0.95:0.05:3, mix and grind until pulverized, then burn at 900°C for 3h, cool down to room temperature, take out, and grind , to obtain powdered yttrium metaphosphate-based rare earth visible-ultraviolet up-conversion luminescent material.

Embodiment 2

[0036] Weigh yttrium oxide, praseodymium oxide and ammonium dihydrogen phosphate according to the molar ratio of each element yttrium:praseodymium:phosphorus=0.95:0.05:3, mix and grind until pulverized, then burn at 950°C for 2.5h, drop to room temperature, take out, Grinding to obtain powdery yttrium metaphosphate-based rare earth visible-ultraviolet up-conversion luminescent material.

Embodiment 3

[0038] Weigh yttrium oxide, praseodymium oxide and ammonium dihydrogen phosphate according to the molar ratio of each element yttrium:praseodymium:phosphorus=0.95:0.05:3, mix and grind until pulverized, then burn at 850°C for 4h, cool down to room temperature, take out, and grind , to obtain powdered yttrium metaphosphate-based rare earth visible-ultraviolet up-conversion luminescent material.

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Abstract

The present invention discloses a phosphate or metaphosphate based visible-ultraviolet up-conversion luminescence material doped with rare earth ions, wherein phosphate or metaphosphate serves as a substrate, and the substrate material is doped with Pr<3+>; a molar ratio of phosphate or metaphosphate to Pr<3+> is (0.9-3):(0.01-0.1). The present invention further provides a preparation process of the material, comprising: (a) according to the chemical formula, weighing oxide materials of corresponding elements and ammonium dihydrogen phosphate according to a stoichiometric ratio; and (b) grinding the weighed materials, burning the ground materials at the temperature of 850 to 950 DEG C for 2.5-4 h, cooling the materials to the room temperature, and grinding the materials to obtain a powder-like up-conversion luminescence material. It is experimentally proved that when excited by a common light source (such as an incandescent lamp, an xenon lamp, a fluorescent lamp and an LED lamp), especially by sunlight, the material can emit ultraviolet light UVC that can effectively kill bacteria; and the material has a broad application prospect in the fields of 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 phosphate or metaphosphate-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 outside the ultraviolet 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/81H01L33/50A61L2/10A61L9/20A23L3/28
Inventor 杨艳民张伟吴建红
Owner HEBEI UNIVERSITY
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