Preparation method of water-soluble fluorescent calcium fluoride nanoparticle

A technology of fluorescent nanocrystals and calcium fluoride, applied in chemical instruments and methods, nanotechnology, nano-optics, etc., to achieve the effects of easy-to-obtain, low-cost, and simple synthesis process

Active Publication Date: 2018-03-20
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there are few reports on fluorescent calcium fluoride nanocrystals that do not rely on rare earth doping, especially the use o

Method used

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  • Preparation method of water-soluble fluorescent calcium fluoride nanoparticle
  • Preparation method of water-soluble fluorescent calcium fluoride nanoparticle
  • Preparation method of water-soluble fluorescent calcium fluoride nanoparticle

Examples

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Example Embodiment

[0031] Example 1:

[0032] 1) Dissolve 0.01mol calcium nitrate in 10g deionized water to form solution A;

[0033] 2) Dissolve 0.003mol potassium citrate and 0.001mol norleucine in 10g deionized water to form solution B;

[0034] 3) Dissolve 0.02 mol of sodium fluoride in 10 grams of deionized water to form solution C;

[0035] 4) Add the solution B obtained in step 2) dropwise to the solution A obtained in step 1) at room temperature, and stir well for 15 minutes to form a mixed solution D;

[0036] 5) Add the solution C obtained in step 3) dropwise to the mixed solution D obtained in step 4) at room temperature, and stir fully for 15 minutes to form a mixed solution E;

[0037] 6) Transfer the mixed solution E obtained in step 5) to a closed hydrothermal reactor, and after reacting at 120°C for 12 hours, it is naturally cooled to room temperature to obtain a reaction solution;

[0038] 7) Use a high-speed centrifuge to centrifuge the reaction solution obtained in step 6) to obtain the p...

Example Embodiment

[0039] Example 2 is the same as Example 1, except that:

[0040] 1) Dissolve 0.01mol calcium nitrate in 10g deionized water to form solution A;

[0041] 2) Dissolve 0.0036mol sodium citrate and 0.001mol arginine in 10 grams of deionized water to form solution B;

[0042] 3) Dissolve 0.0205 mol of potassium fluoride in 10 grams of deionized water to form solution C;

[0043] 6) Transfer the mixed solution E obtained in step 5) to a closed hydrothermal reactor, and after reacting at 150°C for 9 hours, it is naturally cooled to room temperature to obtain a reaction solution;

[0044] 7) Use a high-speed centrifuge to centrifuge the reaction solution obtained in step 6) to obtain the precipitate. Use deionized water and absolute ethanol to alternately centrifuge and wash three times to remove excess electrolyte in the system, and then redisperse it in deionized water to adjust the pH to 8.5. Obtain water-soluble calcium fluoride fluorescent nanocrystals.

Example Embodiment

[0045] Example 3 is the same as Example 1, except that:

[0046] 1) Dissolve 0.01 mol of calcium chloride in 10 grams of deionized water to form solution A;

[0047] 2) Dissolve 0.015mol potassium citrate and 0.007mol norleucine in 10 grams of deionized water to form solution B;

[0048] 3) Dissolve 0.0205 mol of potassium fluoride in 10 grams of deionized water to form solution C;

[0049] 6) Transfer the mixed solution E obtained in step 5) to a closed hydrothermal reactor, and after reacting at 180°C for 3 hours, it is naturally cooled to room temperature to obtain a reaction solution;

[0050] 7) Use a high-speed centrifuge to centrifuge the reaction solution obtained in step 6) to obtain the precipitate. Use deionized water and absolute ethanol to alternately centrifuge and wash three times to remove excess electrolyte in the system, and then redisperse it in deionized water to adjust the pH to 9.5, to obtain water-soluble calcium fluoride fluorescent nanocrystals.

[0051] The X-r...

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Abstract

The invention relates to a preparation method of water-soluble fluorescent calcium fluoride nanoparticle. The preparation method comprises the following steps of dissolving soluble calcium salt into deionized water, so as to form a solution A; dissolving soluble citrate salt and soluble amino acid into the deionized water, so as to form a solution B; dissolving soluble fluoride salt into the deionized water, so as to form a solution C; gradually dripping the solution B into the solution A, and stirring, so as to form a mixing solution D; gradually dripping the solution C into the mixing solution D, and stirring, so as to form a mixing solution E; reacting the mixing solution E in a sealed hydrothermal reactor, and cooling to room temperature, so as to obtain a reaction solution; alternatively centrifuging and washing precipitate after centrifuging of the reaction solution by the deionized water and absolute ethyl alcohol, re-dispersing into the deionized water, and adjusting the pH (potential of hydrogen) value to 8.0 to 10.0, so as to obtain the water-soluble fluorescent calcium fluoride nanoparticle. The preparation method has the advantages that the raw materials are poisonlessand green, the sources are rich, the obtaining is easy, the cost is low, and the synthesis technology is simple; the product quality is stable, the technology repeatability is good, the crystallizingdegree and stability of the particles are good, and the water-soluble fluorescent calcium fluoride nanoparticle can be applied into biological materials and coating materials.

Description

technical field [0001] The invention belongs to the field of inorganic material preparation technology, and in particular relates to a preparation method of water-soluble fluorescent calcium fluoride nanoparticles. Background technique [0002] The fluorescence property of a substance is a very important property, which is widely used in biomedicine, instrument detection, anti-counterfeiting identification and other fields. [0003] At present, the well-known fluorescent substances mainly include fluorescent proteins, organic dyes, semiconductor quantum dots, modified carbon nanotubes, metal nanoparticles, silicon quantum dots, and rare earth doped phosphors. However, there are some shortcomings in the application of these fluorescent substances, such as the high toxicity of quantum dots and the unfriendly environment; the high cost of synthesis and purification of rare earth-doped nanoparticles and colloidal gold; for example, the fluorescent physicochemical properties of f...

Claims

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Application Information

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IPC IPC(8): C09K11/61B82Y20/00B82Y40/00C01F11/22
CPCB82Y20/00B82Y40/00C01F11/22C01P2002/60C01P2004/64C01P2006/60C09K11/616
Inventor 谭军军程诚王金桃
Owner HUBEI UNIV OF TECH
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