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A kind of preparation method of two-dimensional material

A two-dimensional material and raw material technology, applied in the field of nanomaterials, can solve the problems of molybdenum sulfide sheets with reduced catalytic performance and photoelectric performance, molybdenum sulfide nanosheets with functional groups, etc., to achieve easy large-scale production, improve comprehensive economic benefits, highly active effect

Active Publication Date: 2017-11-21
广东一纳科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the surface of molybdenum sulfide nanosheets stripped by oxidant will have functional groups left by oxidant.
These functional groups will lead to the degradation of the catalytic performance and photoelectric performance of the molybdenum sulfide sheet

Method used

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  • A kind of preparation method of two-dimensional material
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  • A kind of preparation method of two-dimensional material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 (preparation of molybdenum sulfide two-dimensional material)

[0040] 1) molybdenum sulfide powder after 800 mesh sieves (see the morphology of powder figure 1 Shown) and lithium chloride were mixed according to the mass ratio of 5:1, then added to deionized water, and mixed evenly. Add the mixed liquid into the ball mill tank, select agate balls as the spherical film medium, select the size of the ball milling medium as 0.1mm, the range of the ball material ratio is 1:5, the ball milling speed is 200rpm to 500rpm, and the time is 1h.

[0041] 2) The product of the previous step is sieved to remove the ball milling medium. Then the residue was subjected to high-speed centrifugation, the centrifugation speed was 2000rmp, and the centrifugation time was 20 minutes. After the end, the upper liquid was removed, and the centrifuged sediment was repeatedly washed with alcohol and deionized water. The washed product was dried under vacuum environment.

[0042]...

Embodiment 2

[0045] Embodiment 2 (preparation of niobium selenide two-dimensional material)

[0046] 1) niobium selenide powder (see the morphology of powder Figure 5 Shown) and lithium chloride were mixed according to the mass ratio of 5:1, then added to deionized water, and mixed evenly. Add the mixed liquid into the ball milling tank, choose agate balls as the ball milling medium, the diameter of the agate balls is 0.2mm, the ratio of ball to material is 1:5, and the speed of ball milling is 300rpm. The time is 1h.

[0047] 2) The product of the previous step is sieved to remove the ball milling medium. Then the residue was subjected to high-speed centrifugation, the centrifugation speed was 3000rmp, and the centrifugation time was 20 minutes. After the end, the upper liquid was removed, and the centrifuged sediment was repeatedly washed with alcohol and deionized water. The washed product was dried under vacuum environment.

[0048] 3) Add the product in step 2 into the stripping...

Embodiment 3

[0051] Embodiment 3 (preparation of titanium sulfide two-dimensional material)

[0052] 1) Mix titanium sulfide powder and lithium chloride at a mass ratio of 5:1, then add to deionized water, and mix well. Add the mixed liquid into the ball mill tank, choose agate balls as the spherical film medium, select the size of the ball milling medium as 0.1mm, the range of the ball-material ratio is 1:5, the speed of the ball milling is 200rpm to 500rpm, and the time is 1h.

[0053] 2) The product of the previous step is sieved to remove the ball milling medium. Then the residue was subjected to high-speed centrifugation, the centrifugation speed was 3000rmp, and the centrifugation time was 20 minutes. After the end, the upper liquid was removed, and the centrifuged sediment was repeatedly washed with alcohol and deionized water. The washed product was dried under vacuum environment.

[0054] 3) Add the product in step 2 into the stripping liquid at a concentration of 1 g / L, and pe...

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Abstract

The invention discloses a preparing method for a two-dimensional material. According to the method, the ball milling technology and the liquid-phase ultrasonic stripping technology are combined to prepare the two-dimensional material, and meanwhile, the method of combining centrifugal separation and vacuum filtration is adopted for separating the two-dimensional material and a stripping solvent. The two-dimensional material prepared with the method has the advantages of being high in purity and yield and the like, and materials used in the method can be reused. The method is free of pollution to the environment, high in production efficiency and good in economic benefit. The two-dimensional material prepared with the method can be used for the fields such as photoelectric detection, catalysis, energy storage, lubrication, gas detection and superconduction.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a preparation method of a two-dimensional material. Background technique [0002] A two-dimensional material refers to a material in which electrons can only move freely (planar motion) on a non-nanoscale (1-100nm) in two dimensions, which means that a two-dimensional material is non-nanoscale in the plane where electrons move freely. And the thickness in the direction perpendicular to the plane of electron motion is on the scale of several atoms or tens of atoms, or in other words, on the scale of nanometers. Due to their excellent catalytic and photoelectric properties, two-dimensional materials have attracted more and more attention from researchers. The earliest reports of two-dimensional materials began with the discovery of graphene, and later researchers discovered that transition metal dichalcogenides, hexagonal boron nitride and black scale also have a layered str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G39/06C01B19/04C01G23/00C01B32/205B02C17/10B02C17/20
CPCB02C17/10B02C17/20C01B19/007C01G23/007C01G39/06C01P2004/03C01P2004/04C01P2004/61C01P2004/62
Inventor 杨国伟王建兴刘心悦
Owner 广东一纳科技有限公司
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