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Preparation method of europium-doped strontium aluminate nanobelt with up-conversion luminescence property

A technology of luminescent properties and nanobelts, applied in the field of nanoluminescent materials, can solve problems such as limitation, achieve the effect of reducing droplets, avoiding the generation of impurities, and realizing green light up-conversion luminescence

Active Publication Date: 2019-07-30
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, about the preparation of SrAl by electrospinning 2 o 4 Reports on nanomaterials are rather limited

Method used

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  • Preparation method of europium-doped strontium aluminate nanobelt with up-conversion luminescence property
  • Preparation method of europium-doped strontium aluminate nanobelt with up-conversion luminescence property
  • Preparation method of europium-doped strontium aluminate nanobelt with up-conversion luminescence property

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preparation example Construction

[0038] A preparation method of the europium-doped strontium aluminate nanoribbon with up-conversion luminescence performance of the present invention comprises the following steps:

[0039] First, add aluminum nitrate and strontium nitrate into 4mL deionized water at a stoichiometric ratio of 1:2 until the raw materials are completely dissolved to obtain a transparent solution A; then compose SrAl according to the chemical formula 2 o 4 :xEu (x=0.01~0.05mol%) add dopant europium nitrate to A, the addition amount is 0.01~0.05mmol, then add 2~5mL ethanol, make it dissolve completely, the volume ratio of deionized water and ethanol 4: (2-5), to obtain a mixed solution precursor solution; then, add PVP with a mass ratio of 10% to 15%, and stir for several hours until the PVP is completely dissolved, and the solution becomes colorless and transparent with a certain viscosity. sex.

[0040] Then, turn on the electrospinning device, adjust the high voltage to 25-30kV, draw 2.5mL of...

Embodiment 1

[0044] First, weigh 0.211g Sr(NO 3 ) 3 , 0.75g Al(NO 3 ) 3 Add 4mL of deionized water to fully dissolve it, add 0.01mmol of europium nitrate to the solution, and then add 5mL of ethanol to obtain a precursor solution; weigh 10% PVP by weight, and wait until it dissolves into a transparent and viscous Colloid; start electrospinning, draw 2.5mL precursor solution with a syringe, set the receiving distance between the syringe needle and the collecting plate to 10cm, set the voltage to 25kV, and set the advancing rate to 15uL / min to obtain nanoribbons; Put the spun ribbon into the muffle furnace, set the holding time at 800°C for 3 hours, the heating rate at 4°C / min, the cooling rate at 4°C / min, and take it out after cooling to room temperature, which is the target product.

[0045] figure 1 It is the SrAl prepared according to Example 1 2 o 4 In the X-ray diffraction spectrum of the nanobelt, no impurity peaks appear, indicating that the product is pure SrAl 2 o 4 nanobel...

Embodiment 2

[0049] First, weigh 0.211g Sr(NO 3 ) 3 , 0.75g Al(NO 3 ) 3 Add 4 mL of deionized water to fully dissolve it, add 0.02 mmol of europium nitrate to the solution, and then add 4.5 mL of ethanol to obtain a precursor solution; weigh PVP with a mass ratio of 12%, and dissolve it until it becomes transparent and viscous Colloid; start electrospinning, extract 2.5mL precursor solution with a syringe, set the receiving distance between the syringe needle and the collecting plate to 12cm, set the voltage to 30kV, and set the advancing rate to 16ul / min to obtain nanobelts; Put the electrospun tape into the muffle furnace, set the holding time at 1000°C for 1 hour, the heating rate at 5°C / min, the cooling rate at 20°C / min, and take it out after cooling to room temperature, which is the target product.

[0050] Figure 4 It is the SrAl prepared according to Example 2 2 o 4 In the X-ray diffraction spectrum of the nanobelt, no impurity peaks appear, indicating that the product is pur...

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Abstract

The invention discloses a preparation method of a europium-doped strontium aluminate nanobelt with the up-conversion luminescence property. Deionized water is added into aluminum salt and strontium salt to prepare a solution A, then a dopant and ethanol are added into the solution A to prepare a solution B, and then PVP is added into the solution B to prepare a transparent and viscous precursor solution C; then the nanobelt is collected by adopting an electrostatic spinning method; finally the nanobelt is put into a muffle furnace for annealing treatment, and heating, heat preservation and cooling are carried out to obtain a target product SrAl2O4. The electrostatic spinning method is used, and the preparation method has the advantages of simplicity, feasibility, environmental protection and no harm to human bodies; meanwhile, the uniform and fine fiber belt can be obtained directly, and the possibility is provided for more application. The Eu single-doped SrAl2O4 nanobelt is obtained,and green light up-conversion luminescence is realized.

Description

technical field [0001] The invention belongs to the technical field of nano-luminescence materials, and in particular relates to a preparation method of europium-doped strontium aluminate nanobelts with up-conversion luminescence performance. Background technique [0002] Due to the rich energy level structure of rare earth ions, the luminescence of lanthanide ion doped organisms has always been a hot spot in the field of luminescence research. Luminescent materials have been used in the fields of physics, chemistry, and biology. Notable applications include light-emitting diodes (LEDs), flat panel displays, traffic signs, emergency displays, and safety instructions. Among luminescence phenomena, upconversion luminescence is a kind of luminescence phenomenon with anti-Stoke effect. This kind of luminescence can convert infrared light invisible to the naked eye into visible light visible to the naked eye, and has unique application value in the fields of anti-counterfeiting,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/7734
Inventor 葛万银高文兴徐美美常哲焦思怡张塨凡施金豆
Owner SHAANXI UNIV OF SCI & TECH
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