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Up-conversion nano-material NaYbF4: Tm and preparation method thereof

A technology of nanomaterials and containers, which is applied in the field of preparation of upconversion nanomaterials, can solve problems such as poor dispersion, weak blue-violet light intensity, and uneven shape and size, and achieve high repeatability and high ratio effects

Active Publication Date: 2014-12-24
INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Benefits of technology

The inventors have developed an improved process for making up nanoparticles that can convert UV (ultraviolet) lights into visible colors when exposed to sunlight or other sources like near IR rays. This technology allows for more precise control over how much energy they emit from these materials compared to previous methods such as fluorescent lamps.

Problems solved by technology

This patented technical solution describes various ways for making highly efficient and bright yellowish emitting Eu(III)-doped CeO2) particles called Cyanoferrite® (CFL) without causing harmful effects when exposed to certain wavelength ranges like ultraviolets.

Method used

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  • Up-conversion nano-material NaYbF4: Tm and preparation method thereof
  • Up-conversion nano-material NaYbF4: Tm and preparation method thereof
  • Up-conversion nano-material NaYbF4: Tm and preparation method thereof

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preparation example Construction

[0025] see figure 1 , an upconversion nanomaterial NaYbF 4 : The preparation method of Tm, comprises the following steps:

[0026] Step S101: adding Yb oleic acid complex and Tm oleic acid complex:

[0027] In the container according to the stoichiometric ratio Yb:Tm is 95-99.8:0.2-5, add the solution of Yb oleic acid complex and the solution of Tm oleic acid complex, so that the amount of Yb and Tm reaches 1 mmol;

[0028] Step S102: adding oleic acid and 1-octadecene:

[0029] Add oleic acid and 1-octadecene to the container respectively, so that the total volume of oleic acid reaches 6-10ml, and the total volume of 1-octadecene reaches 10-15ml;

[0030] Step S103: Add NH 4 F and NaOH:

[0031] Add 4~7mmol NH to the container respectively 4 F and 1 ~ 3.5mmol NaOH;

[0032] Step S104: vacuuming:

[0033] Vacuum the container to remove oxygen and moisture in the container;

[0034] Step S105: heating up:

[0035] Then heat the container to the first temperature thres...

Embodiment 1

[0070] The preparation method of the present invention uses RE oleic acid complex as a reactant, and the specific preparation method is as follows:

[0071] Synthesis of a solution of 1 mmol of Yb oleic acid complex (Yb-oleate):

[0072] (1) According to the stoichiometric ratio Yb:sodium oleate=1:3, weigh Yb(NO 3 ) 3 ·6H 2 O and sodium oleate;

[0073] ⑵According to the ratio of sodium oleate: cyclohexane: secondary water: absolute ethanol is 6 (mmol): 7 (ml): 3 (ml): 4 (ml), give Yb (NO 3 ) 3 ·6H 2 Add cyclohexane, secondary water and absolute ethanol in the mixture of O and sodium oleate;

[0074] (3) Stir continuously for 24 hours in a sealed container at room temperature;

[0075] (4) Use a separatory funnel to stand for stratification, separate, discard the lower liquid and keep the upper liquid, add ethanol: water = 1:1 (volume ratio) to the upper liquid to clean, and let it stand for stratification again. Placement, separation and cleaning were repeated three t...

Embodiment 2

[0088] Synthesis of a solution of 1 mmol of Yb oleic acid complex (Yb-oleate):

[0089] (1) According to the stoichiometric ratio Yb:sodium oleate=1:4, weigh Yb(NO 3 ) 3 ·6H 2 O and sodium oleate;

[0090] ⑵According to the ratio of sodium oleate: cyclohexane: secondary water: absolute ethanol is 6 (mmol): 14 (ml): 2 (ml): 8 (ml), give Yb (NO 3 ) 3 ·6H 2 Add cyclohexane, secondary water and absolute ethanol in the mixture of O and sodium oleate;

[0091] (3) Stir continuously for 12 hours in a sealed container at room temperature;

[0092] (4) Use a separatory funnel to stand for stratification, separate, discard the lower liquid and keep the upper liquid, add ethanol: water = 1:0.5 (volume ratio) to the upper liquid to clean, and let it stand for stratification again. Placement, separation and cleaning were repeated twice;

[0093] (5) Pour the cleaned upper liquid into a single-necked flask, and rotate it at 60°C until cyclohexane, water and ethanol are all removed to ...

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Abstract

The invention discloses an up-conversion nano-material NaYbF4: Tm and a preparation method thereof. The method comprises the following steps: 1)adding a Yb oleic acid compound and a Tm oleic acid compound in a container according to stoichiometric ratio of Yb to Tm being 95-99.8 to 0.2-5, 2)respectively adding oleic acid and 1-octadecene in the container; 3)respectively adding NH4F and NaOH; 4) vacuumizing the container to remove oxygen and moisture in the container; 5)heating to the temperature of 100-140 DEG C, keeping the temperature for 30-60 minutes, dissolving NH4F and NaOH; heating to the temperature of 280-350 DEG C, keeping the temperature for 40-120 minutes; and 6)cooling to the room temperature, centrifuging the reaction liquid, and cleaning by absolute ethyl alcohol to obtain NaYbF4: Tm. The prepared up-conversion nano-material NaYbF4: Tm has the advantages of high repeatability, small size, uniform morphology, and high ratio of intensity of blue-violet light and infrared peak.

Description

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Claims

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Application Information

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Owner INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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