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Visible-ultraviolet up-conversion luminescent material BaGd2ZnO5: Er3+, preparation method thereof and application thereof

A technology of luminescent materials and uses, applied in luminescent materials, chemical instruments and methods, light water/sewage treatment, etc., can solve the problems of poor penetrability of 254nm mercury lamps and can only deal with superficial bacteria, etc. Small size and cheap effect

Inactive Publication Date: 2014-08-20
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an up-conversion luminescent material that can generate ultraviolet (UVC) light under the excitation of a blue LED for the disadvantage of poor penetrability of the 254nm mercury lamp and can only treat superficial bacteria Sterilization of glass containers or disinfection of water bodies

Method used

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  • Visible-ultraviolet up-conversion luminescent material BaGd2ZnO5: Er3+, preparation method thereof and application thereof
  • Visible-ultraviolet up-conversion luminescent material BaGd2ZnO5: Er3+, preparation method thereof and application thereof

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Embodiment 1

[0024] Embodiment 1, visible-ultraviolet up-conversion luminescent material

[0025] The chemical formula of the up-conversion luminescent material of the present invention is: BaGd 2 ZnO 5 :1%Er 3+ , where the colon stands for doping, where "1%Er 3+ " stands for Er 2 o 3 is to replace 1% of Gd 2 o 3 .

Embodiment 2

[0026] Embodiment 2, liquid-phase preparation of up-conversion luminescent material

[0027] First, 1.795 g of gadolinium oxide Gd 2 o 3 (0.00495mol) and 0.019g erbium oxide Er 2 o 3 (0.00005mol) to the mixture was added 3ml concentrated HNO 3 Add distilled water to dilute to 60ml, after fully reacting, a transparent solution is obtained, then heat and evaporate to remove excess HNO 3 , crystallized to obtain the corresponding nitrate solid, add 1.485g zinc nitrate pentahydrate (0.005mol) and 1.305g barium nitrate (0.005mol), dissolve in 100ml deionized water, heat and magnetically stir until a transparent solution A is formed;

[0028]Then dissolve the mixture of 4.2g of citric acid and 2.5ml of ethylene glycol in 40ml of deionized water, and stir with a magnetic stirrer for 30 minutes to ensure that all the reagents are evenly dispersed to form solution B;

[0029] Finally, slowly add solution A to solution B dropwise, and heat and stir in a magnetic stirrer at 70°C fo...

Embodiment 3

[0030] Embodiment 3, solid-phase preparation of up-conversion luminescent material

[0031] Analytical pure starting material, 0.987g BaCO 3 , 1.795g Gd 2 o 3 , 0.019g Er 2 o 3 , 0.407gZnO; After grinding the raw materials in a ball mill for 4 hours, burn them at 1400°C for 3 hours, and drop them to room temperature; Take it out and grind it again to get the sample powder.

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Abstract

The invention discloses a visible-ultraviolet up-conversion luminescent material BaGd2ZnO5: Er3+. Rare earth element erbium is added to oxidizing materials of barium, gadolinium and zinc to prepare the body components of the visible-ultraviolet up-conversion luminescent material BaGd2ZnO5: Er3+. The molar ratio among all the elements, namely, the barium: the gadolinium: the zinc: erbium: oxygen is equal to 1: 1.98: 1: 0.02: 5. The visible-ultraviolet up-conversion luminescent material can be prepared by adoption of a liquid phase sol-gel method, and nanoscale powder products are obtained. Or a solid phase method is adopted, and micron-size powder products are obtained. Nanoscale materials are prepared to be water-soluble particles and the water-soluble particles are used for processing water bacteria. The materials prepared by the solid phase method or the sol-gel method are coated on the inner surface of a transparent object and the materials are used for sterilization on the inner portion of the object. The up-conversion luminescent material which aims at the defects that a 254-nm mercury lamp is poor in penetrating capacity and only can process superficial bacteria is provided, wherein the up-conversion luminescent material can generate UVC light under stimulation of a blue-light light-emitting diode (LED) is used for sterilization on the inner portion of a transparent container or disinfection of a water body.

Description

technical field [0001] The invention belongs to the technical field of up-conversion luminescent materials, relates to ultraviolet up-conversion luminescent materials and their liquid-phase and solid-phase preparations, and can be applied to the fields of biology and environmental treatment. Background technique [0002] Ultraviolet rays 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, and achieving the effect of sterilization. After testing, the effective wavelength range of ultraviolet sterilization can be divided into four different bands: UVA (400-315nm), UVB (315-280nm), UVC (280-200nm) and vacuum ultraviolet (200-100nm). In terms of sterilization speed, UVC is within the range of microbial absorption peaks, and can kill viruses and bacteria by destroying the DNA structure of microorganisms within 1 second, while UVA and UVB are outside...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78A61L2/10C02F1/32
CPCY02W10/37
Inventor 杨艳民张伟焦福运李志强杨志平武永刚
Owner HEBEI UNIVERSITY