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Silicate-based rare-earth ion doped visible-ultraviolet up-conversion luminescent material, and preparation method and application thereof

A technology of rare earth ions and luminescent materials, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of safety, hidden dangers, and inability to sterilize applications caused by operators, so as to reduce sterilization costs, low prices, and easy large-scale production. Effect

Inactive Publication Date: 2015-11-04
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 silicate-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 an excitation source, which not only It brings safety hazards to operators and cannot be applied in large-scale sterilization

Method used

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  • Silicate-based rare-earth ion doped visible-ultraviolet up-conversion luminescent material, and preparation method and application thereof
  • Silicate-based rare-earth ion doped visible-ultraviolet up-conversion luminescent material, and preparation method and application thereof
  • Silicate-based rare-earth ion doped visible-ultraviolet up-conversion luminescent material, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Weigh yttrium nitrate, praseodymium nitrate, lithium carbonate and mesoporous silica according to the molar ratio of each element yttrium:praseodymium:lithium:silicon=1.836:0.012:0.07:0.918, mix and dissolve in distilled water, ultrasonically vibrate until uniformly dispersed, drop Add NaOH solution to make the pH of the solution 7, stir for 1 h, put it into the reaction kettle, heat it at 110 °C for 20 h, cool to room temperature, filter to take the filter cake, wash it with distilled water 5 times, and dry it at 60 °C for 6 h. The powder was calcined in a high-temperature box furnace, kept at 1100°C for 4 h, and then lowered to room temperature; taken out and ground to obtain a powdery up-conversion luminescent material.

[0040] The mesoporous silica was prepared by the following method: 240 mL of distilled water, 100 mL of absolute ethanol, 24 m of ammonia water and 5.2 g of cetyltrimethylammonium bromide were mixed evenly, and 7.28 mL of Tetraethyl orthosilicate, c...

Embodiment 2

[0042] Weigh yttrium nitrate, praseodymium nitrate, lithium carbonate and mesoporous silica according to the molar ratio of each element yttrium:praseodymium:lithium:silicon=1.836:0.012:0.07:0.918, mix and dissolve in distilled water, ultrasonically vibrate until uniformly dispersed, drop Add NaOH solution to make the pH of the solution 7, stir for 1.5 h, put it into a reaction kettle, heat it at 100 °C for 25 h, cool to room temperature, filter to take the filter cake, wash with distilled water 5 times, and dry at 60 °C for 6 h. The powder was calcined in a high-temperature box furnace, kept at 1000°C for 5 h, and then lowered to room temperature; taken out and ground to obtain a powdery up-conversion luminescent material.

Embodiment 3

[0044] Weigh yttrium nitrate, praseodymium nitrate, lithium carbonate and mesoporous silica according to the molar ratio of each element yttrium:praseodymium:lithium:silicon=1.836:0.012:0.07:0.918, mix and dissolve in distilled water, ultrasonically vibrate until uniformly dispersed, drop Add NaOH solution, stir for 1 h, then put it into the reaction kettle, heat it at 120°C for 18 h, cool to room temperature, filter to take the filter cake, wash it with distilled water for 5 times, dry at 60°C for 6 h, put the powder into a high temperature box furnace Calcined at 1200°C for 4.5 h, then lowered to room temperature; taken out and ground to obtain a powdery up-conversion luminescent material.

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Abstract

The present invention discloses a silicate-based rare-earth ion doped visible-ultraviolet up-conversion luminescent material, wherein silicate is used as a substrate; the substrate material is doped with Pr<3+> and Li<+>; and the molar ratio of the silicate:Pr<3+>:Li<+> is equal to (0.77-0.99):(0.01-0.03):(0-2). The present invention also provides a preparation method of the material. The preparation method comprises: weighing nitrate, carbonate or oxide raw material that contains corresponding metal elements according to a ratio, wherein a silicon source in use is mesoporous silica; dissolving the weighed materials into distilled water, dispersing the materials evenly to obtain a mixture, regulating the pH value of the mixture to be neutral, stirring the mixture, carrying out a hydrothermal reaction on the mixture at 100-120 DEG C for 18-25 hours, cooling the mixture, filtering the mixture, washing the mixture, and drying the mixture to obtain a powdered reaction product, roasting the reaction product, cooling the roasted reaction product, and then grinding the product to obtain a powdered up-conversion luminescent material. According to an experiment, the material can emit UVC ultraviolet light that can effectively kill bacteria under excitation of a normal light source (such as an incandescent lamp, an xenon lamp, a fluorescent lamp, and an LED lamp), particularly sunlight; and the material has a wide application prospect in 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 silicate-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 ster...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/79C09K11/74C09K11/66C09K11/59C09K11/64
Inventor 杨艳民张伟吴建红
Owner HEBEI UNIVERSITY
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