Method for preparing water-soluble NaYF4 up-conversion luminescent material

A luminescent material, water-soluble technology, applied in luminescent materials, chemical instruments and methods, rare earth metal compounds, etc., can solve problems such as difficult to disperse, achieve the effects of pollution-free by-products, low equipment requirements, and easy scale-up

Inactive Publication Date: 2010-12-29

DONGHUA UNIV

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AI-Extracted Technical Summary

Problems solved by technology

The surface of UCNPs obtained by the current method is usually hydrophobic organic ligands, ma...

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Abstract

The invention relates to a method for preparing a water-soluble NaYF4 up-conversion luminescent material, which comprises the following steps of: (1) adding 1 to 30mmol of NaF solid into 3 to 20mL of ethylene glycol to obtain solution A; (2) adding 0.1 to 2g of polyvinylpyrrolidone into the 3 to 20mL of ethylene glycol, dispersing, and adding 0.05 to 5mmol of solid LnCl3 to obtain solution B; and (3) adding A into B, performing ultrasonic stirring for 30 minutes, transferring to a high pressure reactor, reacting at the temperature of between 140 and 240 DEG C for 1 to 48 hours, and centrifugally drying to obtain the water-soluble NaYF4 up-conversion luminescent material. The method has the characteristics of low reaction temperature, short reaction time, low requirement on equipment, no harm of byproducts, simpler operation, and easy industrialization; and the prepared material has the advantages of controllable crystalline phase, adjustable luminescence, and good application prospect.

Application Domain

Rare earth metal compoundsLuminescent compositions

Technology Topic

ChemistryWater soluble +7

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Examples

Experimental program(9)

Example Embodiment

[0018] Example 1

[0019] (A) Weigh 25mmol of NaF solid in a beaker, then add 20mL of ethylene glycol, dissolve and stir under ultrasound for 20 minutes at room temperature; (B) Add 1g of polyvinylpyrrolidone K-30 to 20mL of ethylene glycol (PVP), ultrasonic dissolving and stirring at room temperature for 20 minutes; after the dispersion is complete, add 3mmol solid LnCl 3 (Ln=80mol%Y+18mol%Yb+2mol%Er), dissolve with ultrasonic stirring for about 20 minutes. Under stirring conditions, A was added to B, followed by ultrasonic stirring for 30 minutes. Finally, it was transferred to an autoclave and reacted at 140°C for 12 hours. After the reaction, the water-soluble NaYF with adjustable crystal phase and luminescence can be obtained by centrifugal drying 4 Up-conversion luminescent material.

Example Embodiment

[0020] Example 2

[0021] (A) Weigh 25mmol of NaF solid in a beaker, then add 20mL of ethylene glycol, dissolve and stir under ultrasound for 20 minutes at room temperature; (B) Add 1g of polyvinylpyrrolidone K-30 to 20mL of ethylene glycol (PVP), ultrasonic dissolving and stirring at room temperature for 20 minutes; after the dispersion is complete, add 3mmol solid LnCl 3 (80mol% Y+18mol% Yb+2mol% Er), dissolve with ultrasonic stirring for about 20 minutes. Under stirring conditions, A was added to B, followed by ultrasonic stirring for 30 minutes. Finally, it was transferred to an autoclave and reacted at 180°C for 12 hours. After the reaction, the water-soluble NaYF with adjustable crystal phase and luminescence can be obtained by centrifugal drying 4 Up-conversion luminescent material.

Example Embodiment

[0022] Example 3

[0023] (A) Weigh 25mmol of NaF solid in a beaker, then add 20mL of ethylene glycol, dissolve and stir under ultrasound for 20 minutes at room temperature; (B) Add 1g of polyvinylpyrrolidone K-30 to 20mL of ethylene glycol (PVP), ultrasonic dissolving and stirring at room temperature for 20 minutes; after the dispersion is complete, add 3mmol solid LnCl 3 (80mol% Y+18mol% Yb+2mol% Er), dissolve with ultrasonic stirring for about 20 minutes. Under stirring conditions, A was added to B, followed by ultrasonic stirring for 30 minutes. Finally, it was transferred to an autoclave and reacted at 220°C for 12 hours. After the reaction, the water-soluble NaYF with adjustable crystal phase and luminescence can be obtained by centrifugal drying 4 Up-conversion luminescent material.

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Low reaction temperature
Short reaction time

Method for preparing water-soluble NaYF4 up-conversion luminescent material

A luminescent material, water-soluble technology, applied in luminescent materials, chemical instruments and methods, rare earth metal compounds, etc., can solve problems such as difficult to disperse, achieve the effects of pollution-free by-products, low equipment requirements, and easy scale-up

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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