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Preparing method of NaBiF4: Yb3+, Er3+ material

A compound and polyol technology, applied in the field of inorganic nano-luminescent materials, can solve the problems of easy decomposition, long time, easy to be hydrolyzed, etc., and achieve the effects of simple preparation process, increased water resistance, and cheap raw materials.

Active Publication Date: 2019-09-06
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some materials are severely hydrolyzed, oxidized, and decomposed during practical application, and even have obvious biological toxicity or easily decompose into biologically toxic materials. These factors limit their wide application
Due to the poor stability of trivalent Bi ions, they are easily hydrolyzed, which greatly limits the ability of NaBiF 4 practical application of
[0005] At present, the method to improve the water resistance of materials is generally to coat the core-shell structure, in which the shell cladding material is made of SiO 2 Mainly, but dense SiO 2 The shell requires a lot of water to participate in the preparation process, which makes it unsuitable for easily hydrolyzed materials
In addition, SiO 2 The shell coating process is cumbersome and takes a long time, which will greatly increase the cost of industrial mass production of materials

Method used

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  • Preparing method of NaBiF4: Yb3+, Er3+ material
  • Preparing method of NaBiF4: Yb3+, Er3+ material
  • Preparing method of NaBiF4: Yb3+, Er3+ material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Disperse 3.12mmol of bismuth nitrate, 8mmol of sodium nitrate, 0.08mmol of erbium nitrate and 0.8mmol of ytterbium nitrate in 100mL of ethylene glycol to obtain a transparent solution A;

[0034] Then, disperse 24mmol of ammonium fluoride in 40mL of ethylene glycol to obtain a transparent solution B;

[0035] Mix solution A and solution B, and obtain a mixed solution after stirring, and divide the mixed solution into solution I and solution II equally;

[0036] Then add 120 μL of 50% aqueous solution of polyacrylic acid dropwise to solution II, heat to 50 degrees Celsius, and last for more than 5 minutes;

[0037] The solution I and the treated solution II were centrifuged and washed with alcohol, and the obtained white particles were dried at 70 degrees Celsius to obtain pure NaBiF 4 :Yb 3+ ,Er 3+ Nanoparticles and NaBiF of the present invention 4 :Yb 3+ ,Er 3+ nanoparticle material.

[0038] Get the pure NaBiF prepared by this implementation 4 :Yb 3+ ,Er 3+ ...

Embodiment 2

[0045] Disperse 3.12mmol of bismuth nitrate, 8mmol of sodium nitrate, 0.08mmol of erbium nitrate and 0.8mmol of ytterbium nitrate in 100mL of ethylene glycol to obtain a transparent solution A;

[0046] Then, disperse 24mmol of ammonium fluoride in 40mL of ethylene glycol to obtain a transparent solution B;

[0047] Mix solution A and solution B, stir and mix to obtain a mixed solution, and divide the mixed solution into solution I and solution II equally;

[0048] Then add 200 μL of 50% aqueous solution of polyacrylic acid dropwise to solution II, and then heat to 70 degrees Celsius for more than 5 minutes;

[0049] The solution I and the treated solution II were centrifuged separately and washed with alcohol, and the obtained white particles were dried at 70 degrees Celsius for 6 hours to obtain uncoated NaBiF 4 :Yb 3+ ,Er 3+ Nanoparticles and NaBiF of the present invention 4 :Yb 3+ ,Er 3+ nanoparticles.

[0050] The uncoated NaBiF prepared in this implementation 4 :...

Embodiment 3

[0053] Disperse 3.12mmol of bismuth nitrate, 8mmol of sodium nitrate, 0.08mmol of erbium nitrate and 0.8mmol of ytterbium nitrate in 100mL of ethylene glycol to obtain a transparent solution A;

[0054] Then, disperse 24mmol of ammonium fluoride in 40mL of ethylene glycol to obtain a transparent solution B;

[0055] Mix solution A and solution B, and obtain a mixed solution after mixing, and divide the mixed solution into solution I and solution II equally;

[0056] Then add 0.15 g of citric acid dropwise to solution II, and then heat to 80 degrees Celsius for more than 5 minutes;

[0057] The solution I and the treated solution II were centrifuged separately and washed with alcohol, and the obtained white particles were dried at 70 degrees Celsius for 6 hours to finally obtain uncoated NaBiF 4 :Yb 3+ ,Er 3+ Nanoparticles and NaBiF of the present invention 4 :Yb 3+ ,Er 3+ nanoparticles.

[0058] Take the NaBiF coated with the novel high water resistance organic polymer ...

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Abstract

The invention discloses a preparing method of a NaBiF4: Yb3+, Er3+ material. The method comprises the steps that a mixed liquor is prepared from polyhydric alcohols, a compound containing Na+, a compound containing Bi3+, a compound containing Yb3+, a compound containing Er3+ and a compound containing F-; the mixed liquor reacts with a proper amount of polyatomic acid at a proper temperature to prepare the NaBiF4: Yb3+, Er3+ material. The NaBiF4: Yb3+, Er3+ material has a macromolecule organic-matter shell layer with high water resistance, the shell layer has high water proofing performance andhigh humidity resistance, and can coat the surface of a material with the size as small as the nanoscale, the water resistance of the material can be improved, the properties of the material have noinfluence on the shell layer, a brand-new solution is provided for practical application of other materials with poor water resistance, and application of the material in a humid and waterish environment is achieved.

Description

technical field [0001] The invention belongs to the technical field of inorganic nano-luminescent materials, in particular to a NaBiF 4 :Yb 3+ ,Er 3+ Preparation method of nanoparticles. Background technique [0002] With the rapid development and cross integration of luminescent materials, nanomaterials and biomedical technology, upconversion nanomaterials are widely used in biological fields such as biological imaging and optical temperature measurement. [0003] In order to improve the up-conversion luminous efficiency of the material, the phonon energy is generally selected to be low (<350cm -1 ) materials as substrates, currently mostly concentrated on rare earth fluorides, whose general molecular formula is NaREF 4 (RE=Y, Gd, Sc, La, Lu, etc.). However, factors such as raw material price, preparation process, synthesis energy consumption, material toxicity and stability must be considered in practical application. Due to the expensive raw materials of various ...

Claims

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Application Information

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IPC IPC(8): C09K11/74B82Y20/00B82Y40/00
CPCC09K11/7773B82Y20/00B82Y40/00
Inventor 郭崇峰陈玉华
Owner NORTHWEST UNIV