Two-dimensional transition metal boride material, and preparation method and application thereof

A transition metal and pre-transition metal technology, applied in the field of materials, can solve the problems of the synthesis mechanism of MBenes materials, the lack of systematic research on the influence of surface functional groups on structural stability, etc., and achieve the effect of simple preparation process and easy operation of preparation process.

Active Publication Date: 2021-08-10
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current research on MBenes materials is still in its infancy, and there is still a lack of systematic res

Method used

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  • Two-dimensional transition metal boride material, and preparation method and application thereof
  • Two-dimensional transition metal boride material, and preparation method and application thereof
  • Two-dimensional transition metal boride material, and preparation method and application thereof

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[0025] Another aspect of the embodiments of the present invention provides a method for preparing a two-dimensional transition metal boride, comprising: removing the A-site element in the MAB phase material by etching with a dilute alkali solution, and obtaining the two-dimensional transition metal boride material .

[0026] In some embodiments, the preparation method includes: etching the MAB phase material in a dilute alkali solution with a concentration of 0.1mol / L-2mol / L for 0.5h-24h, and stripping the A-site Al element of the MAB phase. Two-dimensional transition metal boride materials were obtained.

[0027] Wherein, the preparation method of the MAB phase material comprises: uniformly mixing M and / or materials containing M, A and / or materials containing A, B and / or materials containing B according to the molar ratio of the target materials, and the obtained The mixture is reacted at a high temperature of 1000-1200° C. for 6-12 hours in an inert atmosphere to obtain the...

Embodiment 1

[0039] Embodiment 1: In this embodiment, the M position is the manganese element Mn 2 B 2 Material.

[0040] The Mn 2 B 2 The preparation method of the material is as follows:

[0041] (1) Weigh 2.20 g of manganese powder with a particle size of 1 μm, 0.65 g of 200-mesh aluminum powder, 0.43 g of 2-3 μm boron powder, 5.84 g of sodium chloride, and 7.45 g of potassium chloride, and grind and mix the above materials to obtain a mixture.

[0042] (2) Put the mixture into a tube furnace for reaction. The reaction conditions are: reaction temperature 1050°C, holding time 6h, inert atmosphere protection. After the temperature of the sintering system drops to room temperature, the reaction product in the alumina crucible is taken out.

[0043] (3) Wash the reaction product with deionized water and alcohol: put the reaction product into a beaker, add deionized water, stir and ultrasonically clean for 30 minutes, then let it stand for 1 hour, and pour off the supernatant. After ...

Embodiment 2

[0049] Embodiment 2: In this embodiment, the M position is the manganese element Mn 2 B 2 Material. Adjust the etchant concentration to 1mol / L.

[0050] The Mn 2 B 2 The preparation method of the material is as follows:

[0051] (1) Weigh 2.20 g of manganese powder with a particle size of 1 μm, 0.65 g of 200-mesh aluminum powder, 0.43 g of 2-3 μm boron powder, 5.84 g of sodium chloride, and 7.45 g of potassium chloride, and grind and mix the above materials to obtain a mixture.

[0052] (2) Put the mixture into a tube furnace for reaction. The reaction conditions are: reaction temperature 1050°C, holding time 6h, inert atmosphere protection. After the temperature of the sintering system drops to room temperature, the reaction product in the alumina crucible is taken out.

[0053] (3) Wash the reaction product with deionized water and alcohol: put the reaction product into a beaker, add deionized water, stir and ultrasonically clean for 30 minutes, then let it stand for ...

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Abstract

The invention discloses a two-dimensional transition metal boride material, and a preparation method and application thereof. The molecular formula of the two-dimensional transition metal boride material is shown as MB or MnB2n-2, M is selected from previous transition metals Mn and W or a combination of Mn, W, any two or more of Cr, Fe and Mo, B is a boron element, and n is 2, 3 or 4. The two-dimensional transition metal boride has a tetragonal system structure, and the space group is Cmmm. The invention also provides a preparation method of the two-dimensional transition metal boride material by etching the MAB phase in a dilute alkali solution. The layered material of the two-dimensional transition metal boride material provided by the invention has a series of advantages of magnetic adjustability, heat conduction, electric conduction, multiple active sites and the like, and the structure and the property of the material are regulated and controlled by regulating and controlling the content, the position and the type of an M-site element; in addition, the preparation process is simple and easy to operate, and has potential application prospects in the fields of wave absorption, energy storage, catalysis and the like.

Description

technical field [0001] The invention relates to an inorganic material, in particular to a two-dimensional transition metal boride material and its preparation method and application, and belongs to the field of material technology. Background technique [0002] MBenes is a new type of two-dimensional transition metal boride material. Similar to two-dimensional transition metal carbide (nitride) MXenes, MBenes nanosheets can theoretically pass through the parent phase MAB phase (M refers to transition metal elements, A is the main Group element, B is boron) by chemical etching at the A site, with the subsequent physical stripping to obtain [J. 】. At present, more than 20 kinds of MAB phases have been synthesized, including MoAlB, WAlB, Fe 2 AlB 2 、Cr 2 AlB 2 , Mn 2 AlB 2 、Cr 3 AlB 4 、Cr 4 AlB 6 , (Mo x ,Cr 1-x ) AlB, (Mo x ,W 1-x ) AlB, (Fe 2 ,Cr 2-x )AlB 2 Wait. Wherein, when n=1, the space group of MoAlB and WAlB is Cmcm, and its crystal structure is repr...

Claims

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Application Information

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IPC IPC(8): C01B35/04
CPCC01B35/04C01P2002/72C01P2004/03C01P2006/42
Inventor 陈科黄庆周小兵宋育杰周洁
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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