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Two-dimensional nanosheet and preparation method and usage thereof

A two-dimensional nano, alkyl lithium technology

Inactive Publication Date: 2019-10-25
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it cannot be mass-produced, and at the same time, the size and thickness of the exfoliated nanosheets are difficult to control.
Chemical vapor deposition (CVD) is an effective method to produce high-quality two-dimensional nanosheets, and it is easy to control the size and thickness of the material. However, strict experimental conditions such as high temperature and high vacuum and specific substrates limit the size and thickness of nanosheets. practical application of

Method used

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  • Two-dimensional nanosheet and preparation method and usage thereof
  • Two-dimensional nanosheet and preparation method and usage thereof
  • Two-dimensional nanosheet and preparation method and usage thereof

Examples

Experimental program
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preparation example Construction

[0085] The preparation method of the present invention will be further described in detail in conjunction with specific examples below. It should be understood that the following examples are only for illustrating and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies realized based on the above contents of the present invention are covered within the scope of protection intended by the present invention.

[0086] The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents and materials used in the following examples can be obtained from commercial sources unless otherwise specified.

[0087] Instruments and Equipment

[0088] The optical microscope photos are tested with an optical microscope manufactured by Nikon. The test method is to directly observe the silicon wafer sample containing nanosheets on the stage to characterize ...

Embodiment 1

[0097] Example 1MoS 2 Preparation of dispersion

[0098] 1) Preparation of n-butyllithium intercalated MoS 2

[0099] At room temperature, add 0.5g MoS to a 25ml autoclave 2powder, then add 5ml of n-butyllithium n-hexane solution in an inert atmosphere, and stir at room temperature for 20 minutes; then place it in an oven and heat at 100°C for 24 hours, and after 24 hours of reaction, take out the autoclave and cool it to room temperature; The mixture was poured into 50ml of n-hexane, vacuum filtered, the filter residue was washed with n-hexane solution to remove residual n-butyllithium, and the filter residue was blown to dryness with argon to obtain a large amount of black solid.

[0100] 2) MoS 2 Preparation of dispersion

[0101] 0.5g of synthesized intercalated MoS 2 Added to 100ml dimethyl sulfoxide solution. Put it in a 250ml beaker, sonicate at a lower power for 120 minutes, and get a black solution with a lot of precipitation, which is MoS 2 Dispersion liquid,...

Embodiment 2

[0126] Example 2TiS 2 Preparation of dispersion

[0127] The preparation method is basically the same as in Example 1, the difference is only that step 1) is

[0128] At room temperature, add 0.5g TiS to a 25ml autoclave 2 powder, then add 5ml n-butyllithium n-hexane solution in an inert atmosphere, and stir at room temperature for 20 minutes; pour the mixture into 50ml n-hexane, vacuum filter, and wash the filter residue with n-hexane solution to remove residual n-butyl Lithium, the filter residue was blown to dryness with argon to obtain a large amount of black solid.

[0129] Monolayer TiS can be obtained by the above method 2 The dispersion liquid has a size of more than ten microns and a thickness of 0.6-3 nanometers.

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Abstract

The invention provides a two-dimensional nanosheet and a preparation method and usage thereof. Through a means of solution stripping, the two-dimensional nanosheet which is large in sheet layer size,high in quality and small in defect number and mainly takes a single layer is prepared. The morphology of the two-dimensional nanosheet is represented through an optical microscope, a scanning electron microscope, a transmission electron microscope and an atomic force microscope. A Raman spectrum is utilized to represent that the two-dimensional nanosheet obtained through solution stripping and atwo-dimensional nanosheet obtained through a chemical vapor deposition method have the equally high crystalline quality. An infrared transmittance spectrum is utilized to represent successful modification of organic matter to the two-dimensional nanosheet. Research results show that the two-dimensional nanosheet synthesized through the preparation method has the advantages of being large in size,high in quality, small in defect number, easy to modify and the like.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a two-dimensional nanosheet and its preparation method and application. Background technique [0002] Recently, the successful exfoliation of graphene (Science 2004, 306, 666-669) has stimulated researchers' enthusiasm for research on graphene-like two-dimensional materials. This kind of material has a sheet-like structure, the lateral dimension is larger than 100 nanometers or as high as several microns or even larger, and the thickness is only a single atom or a few atoms thick (generally less than 5 nanometers). At the same time, these two-dimensional materials have excellent properties different from bulk materials due to the quantum confinement effect, such as ultra-high room temperature mobility, quantum Hall effect, ultra-high specific surface area, high Young's modulus, and excellent optical transparency. And excellent electrical and thermal conductivity...

Claims

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Application Information

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IPC IPC(8): C01B17/20C01G23/00C01G35/00C01G39/06C01G41/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B17/20C01G23/007C01G35/00C01G39/06C01G41/00C01P2002/72C01P2002/82C01P2004/02C01P2004/03C01P2004/04
Inventor 郑健王少芝
Owner INST OF CHEM CHINESE ACAD OF SCI
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