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Hydrophilic boron nitride nanosheet and preparation method and application thereof

A technology of boron nitride and nanosheets, which is applied in the field of nanomaterials, can solve the problems of cumbersome experimental process, harsh reaction conditions, and large size of boron nitride nanosheets, and achieve simple experimental equipment, low production costs, and low environmental pollution. Effect

Inactive Publication Date: 2017-11-10
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although boron nitride nanosheets can be successfully prepared by the above method, there are still disadvantages such as long reaction time, cumbersome experimental process, harsh reaction conditions and expensive reaction reagents.
The yield of the reported method for preparing boron nitride nanosheets is still low, and the size of the prepared boron nitride nanosheets is large and poor in water dispersibility, which also greatly limits its application in biomedicine

Method used

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  • Hydrophilic boron nitride nanosheet and preparation method and application thereof
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  • Hydrophilic boron nitride nanosheet and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of alkali ion intercalation boron nitride complex

[0034] A. Disperse the hexagonal boron nitride powder in 30mL ethanol to prepare a dispersion liquid. The concentration of the hexagonal boron nitride powder in the prepared dispersion liquid is 1mg / mL; then add 2mL concentration of 2.5mol to the dispersion liquid / L of potassium hydroxide aqueous solution, ultrasonically mixed to obtain a mixed solution;

[0035] B. Evenly transfer the mixed solution obtained in step A to the reaction kettle through a graduated cylinder, seal it; place it in an oven with a temperature of 180°C for 12 hours, wait to cool to room temperature, vacuum filter and wash with deionized water and collect the deposited The white powder on the microporous filter membrane is put into a vacuum drying oven to dry to remove excess water, and the alkali ion intercalation boron nitride compound can be obtained.

[0036] (2) Preparation of boron nitride nanosheets

[0037] C. Redisper...

Embodiment 2

[0041] (1) Preparation of alkali ion intercalation boron nitride complex

[0042]A. Disperse the hexagonal boron nitride powder in 30mL of ethylene glycol to prepare a dispersion liquid. The concentration of the hexagonal boron nitride powder in the prepared dispersion liquid is 0.5mg / mL; then add 1mL concentration to the dispersion liquid 2.5mol / L aqueous sodium hydroxide solution, ultrasonically mixed to obtain a mixed solution;

[0043] B. Evenly transfer the mixed solution obtained in step A to the reaction kettle through a graduated cylinder, seal it; place it in an oven with a temperature of 160°C for 16 hours, wait to cool to room temperature, vacuum filter and wash with deionized water and collect the deposited The white powder on the microporous filter membrane is put into a vacuum drying oven to dry to remove excess water, and the alkali ion intercalation boron nitride compound can be obtained.

[0044] (2) Preparation of boron nitride nanosheets

[0045] C. Redisp...

Embodiment 3

[0048] (1) Preparation of alkali ion intercalation boron nitride complex

[0049] A. Disperse the hexagonal boron nitride powder in 30mL of glycerol to prepare a dispersion. The concentration of the hexagonal boron nitride powder in the prepared dispersion is 2mg / mL; mol / L lithium hydroxide aqueous solution, and ultrasonically mix to obtain a mixed solution;

[0050] B. Evenly transfer the mixed solution obtained in step A to the reaction kettle through a graduated cylinder, seal it; place it in an oven with a temperature of 120°C for 24 hours, wait to cool to room temperature, vacuum filter and wash with deionized water and collect the deposited The white powder on the microporous filter membrane is put into a vacuum drying oven to dry to remove excess water, and the alkali ion intercalation boron nitride compound can be obtained.

[0051] (2) Preparation of boron nitride nanosheets

[0052] C. Redisperse the alkali ion-intercalated boron nitride complex obtained in step (1...

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Abstract

The invention belongs to the technical field of nanomaterials, and discloses a hydrophilic boron nitride nanosheet and a preparation method and application thereof. The preparation method specifically comprises the following steps that firstly, hexagonal boron nitride powder is dispersed in an alcohol solvent, and a certain quantity of alkali saturated aqueous solution is added; secondly, the alcohol dispersion solution of the boron nitride powder is put into a reaction kettle to be sealed, and reacts for a period of time under a high-temperature closed condition; thirdly, after the product is cooled to the room temperature, the product is washed with deionized water to be neutral after vacuum suction filtration, and freeze drying is conducted to obtain alkali ion intercalated boron nitride compound powder; fourthly, the composite powder is re-dispersed in deionized water, ultrasonic treatment is conducted for 10 minutes, and an aqueous dispersion solution of the boron nitride nanosheet can be obtained after dialysis and purification. The preparation method is simple in process, easy to operate, low in cost and environmentally friendly, the yield of the obtained boron nitride nanosheet is high, and the boron nitride nanosheet has good water dispersibility and stability. The hydrophilic boron nitride nanosheet has potential application prospects in the fields of drug carriers, biological sensing and the like.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a hydrophilic boron nitride nanosheet and its preparation method and application. Background technique [0002] Hexagonal boron nitride (h-BN) is also called "white graphite". As a structural analog of graphite, due to its unique physical and chemical properties, it has attracted extensive attention from researchers at home and abroad. Low-dimensional h-BN nanomaterials have excellent biocompatibility, excellent drug loading capacity and unique photoluminescence and electroluminescence properties, making them ideal for drug carriers, biosensing, bioimaging and tumor therapy, etc. Research hotspots in the field of biomedicine. After the hexagonal boron nitride powder is peeled off layer by layer, single-layer or few-layer boron nitride nanosheets can be obtained. Boron nitride nanosheets are considered to be an excellent carrier for drug and protein deli...

Claims

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Application Information

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IPC IPC(8): C01B21/064B82Y30/00B82Y40/00
Inventor 胡超凡刘应亮战岩郑明涛董汉武梁业如
Owner SOUTH CHINA AGRI UNIV
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