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Preparation method of high-stability boron nitride nanosheet-based fluorescent composite material

A composite material and high-stability technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of inorganic substrates that are rarely reported, and achieve the problems of solid-state fluorescence quenching and thermal quenching, strong fluorescence response, production low cost effect

Active Publication Date: 2022-06-24
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although boron nitride nanosheets are widely used in polymer materials as thermally conductive fillers, there are few reports on their use as inorganic substrates in luminescent materials.

Method used

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  • Preparation method of high-stability boron nitride nanosheet-based fluorescent composite material
  • Preparation method of high-stability boron nitride nanosheet-based fluorescent composite material
  • Preparation method of high-stability boron nitride nanosheet-based fluorescent composite material

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Effect test

Embodiment 1

[0028] A preparation method of a highly stable boron nitride nanosheet-based fluorescent composite material is as follows:

[0029] (1) adding 1.0 g of boron nitride powder with a particle size of 2 to 20 μm into the mixed molten alkali composed of 2.16 g of potassium hydroxide and 2.84 g of sodium hydroxide and evenly ground to no graininess to obtain a mixture;

[0030] (2) Dissolving 0.08 g of nitrogen-doped carbon quantum dots with an emission wavelength of 570 nm in 1 mL of distilled water, adding it to the mixture obtained in step (1), and stirring into a paste-like mixture;

[0031] (3) put the paste mixture into a stainless steel autoclave lined with 25mL polytetrafluoroethylene, and react at 200°C for 2h;

[0032] (4) The product obtained after the reaction in step (3) was dispersed in 500 mL of distilled water, 220W ultrasonic peeling was performed for 1 h, and after the ultrasonication was completed, the obtained dispersion was centrifuged at 2000 rpm for 20 min, th...

Embodiment 2

[0037] A preparation method of a highly stable boron nitride nanosheet-based fluorescent composite material is as follows:

[0038] (1) adding 1.0 g of boron nitride powder with a particle size of 2 to 10 μm into the mixed molten alkali composed of 2.16 g of potassium hydroxide and 2.84 g of sodium hydroxide and evenly ground to no graininess to obtain a mixture;

[0039] (2) Dissolve 0.08g of nitrogen and sulfur-doped carbon quantum dots with an emission wavelength of 520nm in 1mL of distilled water, then add it to the mixture obtained in step (1), and stir to form a paste mixture;

[0040] (3) put the paste mixture into a 25mL PTFE-lined stainless steel autoclave, and react at 190°C for 2h;

[0041] (4) Disperse the product obtained after the reaction in step (3) in 500 mL of distilled water, 200W ultrasonic peeling for 2h, after the end of ultrasonication, centrifuge the obtained dispersion at 1500rpm for 30min, collect the supernatant and the lower sediment respectively, a...

Embodiment 3

[0046] A preparation method of a highly stable boron nitride nanosheet-based fluorescent composite material is as follows:

[0047] (1) 1.0g of boron nitride powder with a particle size of 2~20μm is added to the mixed molten alkali composed of 2.16g of potassium hydroxide and 2.84g of sodium hydroxide, and the powder is uniformly ground to no graininess to obtain a mixture;

[0048] (2) 0.08 g of boron-doped carbon quantum dots with an emission wavelength of 450 nm were dissolved in 1 mL of distilled water, then added to the mixture obtained in step (1), and stirred into a paste-like mixture;

[0049] (3) put the paste mixture into a stainless steel autoclave lined with 25mL polytetrafluoroethylene, and react at 180°C for 2h;

[0050] (4) Disperse the product obtained after the reaction in step (3) in 500 mL of distilled water, 180W ultrasonic peeling for 3 hours, after the end of ultrasonication, centrifuge the obtained dispersion at 1000 rpm for 40 min, collect the supernatant...

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Abstract

The invention belongs to the technical field of inorganic luminescent materials, and particularly relates to a preparation method of a high-stability boron nitride nanosheet-based fluorescent composite material. According to the technical scheme, the preparation method comprises the following steps: adding boron nitride powder into molten alkali, uniformly grinding until no granular sensation exists, adding a doped carbon quantum dot solution, blending into paste, filling into a stainless steel high-pressure kettle with a polytetrafluoroethylene lining, heating and reacting, dispersing a product into distilled water after the reaction is finished, and collecting supernate after ultrasonic and centrifugal treatment, so as to obtain the boron nitride / carbon quantum dot composite material. And finally, drying to obtain the high-stability boron nitride nanosheet-based fluorescent composite material. The preparation method disclosed by the invention is simple and convenient in synthesis process, green and environment-friendly, and low in production cost, and the prepared boron nitride nanosheet-based fluorescent composite material is high in luminous intensity, adjustable in emission wavelength, excellent in luminous stability and thermal stability, and can be applied to the fields of LED (Light Emitting Diode) illumination, fluorescent sensors, anti-counterfeiting encryption and the like.

Description

technical field [0001] The invention belongs to the technical field of inorganic light-emitting materials, and in particular relates to a preparation method of a highly stable boron nitride nanosheet-based fluorescent composite material. Background technique [0002] In recent years, carbon quantum dots have attracted extensive attention due to their low cost, low toxicity, good biocompatibility, and unique photoluminescence properties. However, problems such as self-quenching caused by aggregation between solid-state carbon quantum dots and poor thermal stability caused by surface chemical bond changes severely limit the performance of carbon quantum dots in practical applications. The most direct and effective way to solve the above problems is to encapsulate carbon quantum dots in matrix materials with high thermal conductivity. But so far, there are few thermally conductive materials suitable for improving the thermal conductivity of luminescent composites. Since therm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/63C09K11/65
CPCC09K11/0883C09K11/65C09K11/63Y02B20/00
Inventor 何丽丽张向东贾凯葛春华刘蕊关宏宇
Owner LIAONING UNIVERSITY
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