A kind of two-dimensional transition metal boride material, its preparation method and application

A transition metal and boride 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: 2022-07-26
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • 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 research on the synthesis mechanism, structural stability, and influence of surface functional groups of MBenes materials.

Method used

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  • A kind of two-dimensional transition metal boride material, its preparation method and application
  • A kind of two-dimensional transition metal boride material, its preparation method and application
  • A kind of two-dimensional transition metal boride material, its preparation method and application

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preparation example Construction

[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 using a dilute alkaline solution etching reaction to obtain the two-dimensional transition metal boride material .

[0026] In some embodiments, the preparation method includes: etching the MAB phase material in a dilute alkaline 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 are obtained.

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

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 materials were prepared 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) The mixture is put into a tube furnace for reaction. The reaction conditions are as follows: the reaction temperature is 1050°C, the holding time is 6h, and the inert atmosphere is protected. After the temperature of the sintering system dropped to room temperature, the reaction product in the alumina crucible was 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, and then let stand for 1 hour, and then p...

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 1 mol / L.

[0050] The Mn 2 B 2 The materials were prepared 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) The mixture is put into a tube furnace for reaction. The reaction conditions are as follows: the reaction temperature is 1050°C, the holding time is 6h, and the inert atmosphere is protected. After the temperature of the sintering system dropped to room temperature, the reaction product in the alumina crucible was 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 minu...

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Abstract

The invention discloses a two-dimensional transition metal boride material, a preparation method and application thereof. The molecular formula of the two-dimensional transition metal boride material is represented as MB or M n B 2n‑2 , M is selected from pre-transition metals Mn, W, or a combination of any two or more of Mn, W and Cr, Fe, Mo, B is boron element, and n is 2, 3 or 4. The two-dimensional transition metal boride has a tetragonal crystal structure, and the space group is Cmmm. The present invention also provides a method for preparing the aforementioned two-dimensional transition metal boride material by etching the MAB phase in a dilute alkaline solution. The layered material of the two-dimensional transition metal boride material provided by the present invention has a series of advantages such as adjustable magnetic properties, thermal conductivity, electrical conductivity, multiple active sites, etc. Its structure and properties are regulated by regulating the content, position and type of M-site elements Moreover, 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, a preparation method and application thereof, and belongs to the technical field of materials. Background technique [0002] MBenes is a new type of two-dimensional transition metal boride material. Similar to the two-dimensional transition metal carbon (nitride) MXenes, MBenes nanosheets can theoretically also pass through the matrix MAB phase (M refers to transition metal elements, A is the main phase) Group elements, B is boron), chemically etched the A site, and obtained with subsequent physical stripping [J.Mater.Chem.A, 2017, 5:23530–23535; Chem.Mater., 2017, 29:8953-8957 ]. More than 20 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. Among them, when n=1, for example, the sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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