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Method for preparing two-dimensional nanosheet material through all-directional ultrasonic agitation process

A stirring ultrasonic, two-dimensional nanotechnology, applied in nanotechnology, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of high solvent price, high temperature and high pressure, low output, etc. high effect

Inactive Publication Date: 2015-08-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But these methods all have a fatal shortcoming, that is, the output is very low, which cannot meet the needs of scientific research and production.
In addition, the equipment used for stripping, the solvent price is very expensive, and CVD growth also requires high temperature and high pressure, which consumes a lot of energy

Method used

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  • Method for preparing two-dimensional nanosheet material through all-directional ultrasonic agitation process
  • Method for preparing two-dimensional nanosheet material through all-directional ultrasonic agitation process
  • Method for preparing two-dimensional nanosheet material through all-directional ultrasonic agitation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Weigh 0.12g of graphite, measure 10ml of deionized water, and disperse the two in a quartz tube.

[0019] (2) The quartz tube was placed in an ultrasonic device with an ultrasonic frequency of 20 KHz, and the dispersion liquid in the quartz tube was magnetically stirred at 25° C. for 48 hours. Fully disperse in all directions without dead ends in an ultrasonic environment to peel off the sample.

[0020] (3) The reaction product in step (2) is suction filtered and washed, and dried in a drying oven to obtain graphite two-dimensional nanosheets. If the obtained two-dimensional nanosheets are dispersed in a desired solvent, dispersed two-dimensional nanosheets can be obtained.

[0021] The scanning electron microscope photographs, atomic force microscope photographs and transmission electron microscope photographs of the prepared graphene two-dimensional nanosheets are as follows: figure 1 , figure 2 and image 3 shown.

Embodiment 2

[0023] The difference between this embodiment and Example 1 is that in step (1), the surfactant polyvinylpyrrolidone is added in an amount of 0.01-0.015 moles, so that the molar ratio of polyvinylpyrrolidone to graphene is 1:1-1.5 : Any choice between 1.

Embodiment 3

[0025] (1) Weigh 0.1gh-BN, measure 20ml ethanol, and disperse the two in a quartz tube.

[0026] (2) The quartz tube was placed in an ultrasonic device with an ultrasonic frequency of 30 KHz, and the dispersion liquid in the quartz tube was magnetically stirred at 30° C. for 35 hours.

[0027] (3) The reaction product in the step (2) is suction-filtered and washed, and dried in a drying oven to obtain a BN two-dimensional nanosheet. If the obtained two-dimensional nanosheets are dispersed in a desired solvent, dispersed two-dimensional nanosheets can be obtained.

[0028] The scanning electron microscope photographs, atomic force microscope photographs and transmission electron microscope photographs of the prepared BN two-dimensional nanosheets are as follows: figure 1 , figure 2 and image 3 shown.

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Abstract

The invention discloses a method for preparing two-dimensional nanosheet material through an all-directional ultrasonic agitation process. The method comprises the following steps: (1) dispersing the raw materials to be stripped in a solvent to form a dispersion solution; (2) putting the dispersion solution in the ultrasonic environment, magnetically stirring at the temperature of 25-100 DEG C, carrying out ultrasonic agitation for 1-48 hours and enabling the dispersion solution to be fully dispersed and stripped in all directions without dead angles; (3) filtering and washing a product obtained by the step (2) to prepare the two-dimensional nanosheet material. According to the method, the two-dimensional nano material is prepared by the all-directional ultrasonic agitation process; the method is simple to operate and free of dead angles in ultrasonic agitation; the solvent is cheap, easily available and recyclable. The two-dimensional nanosheet material is free of toxicity to the environment, low in desired temperature and high in yield; expensive instruments and devices are not required.

Description

technical field [0001] The invention relates to a method for preparing two-dimensional nanosheets by using omni-directional stirring and ultrasonic efficient stripping of sheet materials, and belongs to the technical field of two-dimensional nanomaterial preparation. Background technique [0002] Two-dimensional nanosheets, such as graphene, hexagonal boron nitride (h-BN) nanosheets, molybdenum disulfide (MoS 2 ) nanosheets and tungsten disulfide (WS 2 ) nanosheets, etc., have excellent electrical, optical and chemical properties, and have broad application prospects in lasers, electronics, catalysis, biology, etc. Therefore, they have become a research hotspot in the material industry in recent years. With the gradual deepening of research, the demand for two-dimensional nanosheets is increasing. However, due to the strong intermolecular force and ionic bond force between the layers of the sheet material, it is very difficult to prepare them by exfoliation. In particular...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B21/064C01G39/06C01G41/00B22F9/04B82Y40/00
Inventor 郝霄鹏赵刚吴拥中邵永亮
Owner SHANDONG UNIV
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