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MXene material and preparation method and application thereof

A high-temperature reaction, 1axn technology, applied in chemical instruments and methods, rare earth metal compounds, inorganic chemistry, etc., to achieve the effect of simple and easy preparation methods and rich and adjustable space

Inactive Publication Date: 2019-12-06
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, MXene materials that have been synthesized such as Ti 3 C 2 T x 、Ti 2 CT x 、Zr 3 C 2 T x , Nb 2 CT x 、 Ta 4 C 3 T x , V 2 CT x 、Ti 4 N 3 T x 、Mo 2 CT x 、Hf 3 C 2 T x etc. Most of its surface groups are composed of -OH, -O, -F, and MXene materials with other types of surface groups (such as -Cl) have just been reported, but MXene materials with surface groups of -Br or -I have so far not yet reported

Method used

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  • MXene material and preparation method and application thereof
  • MXene material and preparation method and application thereof
  • MXene material and preparation method and application thereof

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Embodiment 1

[0037] In this embodiment, the MXene material with Br as the surface group is Ti 3 C 2 Br 2 , the precursor MAX phase is Ti 3 AlC 2 , the transition metal chloride is CuBr 2 , and these raw materials can be obtained through commercially available channels and the like. The Ti 3 C 2 Br 2 The preparation method is as follows:

[0038] (1) Weigh CuBr 2 0.15 mol, Ti with a particle size of 10 μm 3 AlC 2 0.05 moles of powder, and the above materials were ground and mixed to obtain a mixed product.

[0039] (2) Put the mixture in a corundum crucible and put it into a high-temperature tube furnace for reaction. The reaction conditions are: 700°C, 7 hours, under argon protection. After the temperature of the tube furnace dropped to room temperature, the reaction product in the crucible was taken out.

[0040] (3) Wash the reaction product with deionized water: put the reaction product into a beaker, add deionized water, stir and ultrasonically clean for 30 minutes, then...

Embodiment 2

[0044] In this embodiment, the MXene material with Br as the surface group is Ti 3 C 2 Br 2 , the precursor MAX phase is Ti 3 AlC 2 , the transition metal chloride is NiBr 2 , and these raw materials can be obtained through commercially available channels and the like. The Ti 3 C 2 Br 2 The preparation method is as follows:

[0045] (1) Weigh NiBr 2 0.75 mol, Ti with a particle size of 10 μm 3 AlC 2 0.05 moles of powder, and the above materials were ground and mixed to obtain a mixed product.

[0046] (2) Put the mixture in a corundum crucible and put it into a high-temperature tube furnace for reaction. The reaction conditions are: 700°C, 7 hours, under argon protection. After the temperature of the tube furnace dropped to room temperature, the reaction product in the crucible was taken out.

[0047] (3) Wash the reaction product with deionized water: put the reaction product into a beaker, add deionized water, stir and ultrasonically clean for 30 minutes, then...

Embodiment 3

[0052] In this embodiment, the MXene material with I as the surface group is Ti 3 C 2 I 2 , the precursor MAX phase is Ti 3 AlC 2 , the transition metal chloride is CuI 2 , and these raw materials can be obtained through commercially available channels and the like. The Ti 3 C 2 I 2 The preparation method is as follows:

[0053] (1) Weigh CuI 2 0.3 mol, Ti with a particle size of 10 μm 3 AlC 2 0.05 moles of powder, and the above materials were ground and mixed to obtain a mixed product.

[0054] (2) Put the mixture in a corundum crucible and put it into a high-temperature tube furnace for reaction. The reaction conditions are: 700° C., 12 hours, under argon protection. After the temperature of the tube furnace dropped to room temperature, the reaction product in the crucible was taken out.

[0055] (3) Wash the reaction product with deionized water: put the reaction product into a beaker, add deionized water, stir and ultrasonically clean for 30 minutes, then le...

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Abstract

The invention discloses an MXene material and a preparation method and application thereof. A molecular formula of the MXene material is shown as M<n+1>X<n>Br<2> or M<n+1>X<n>I<2>, where M is Sc, Ti,V, Cr, Zr, Nb, Mo, Hf, Ta and the like, X is C and / or N element, and n is 1, 2, 3 or 4. The preparation method comprises the following steps: mixing a precursor MAX phase material, a transition metalbromide and / or a transition metal iodide, and carrying out a high temperature reaction to obtain the MXene material with Br or I as a surface group. The MXene material with Br or I as the surface group can be used independently as a large-capacity, high-stability halogen battery electrode, the -Br and -I groups can carry out a reversible redox reaction between MXene layers, a stable reaction source is provided for battery charging and discharging, and the feature is not possessed by other element groups such as -F, -Cl, and -O.

Description

technical field [0001] The invention relates to the technical field of two-dimensional crystal materials, in particular to an MXene material with Br / I as a surface group and its preparation method and application. Background technique [0002] Since the discovery of graphene in 2004, two-dimensional materials have received extensive attention and research due to their high specific surface area, high aspect ratio, and unique electronic structure. In 2011, Naguib et al. reported a new class of 2D materials called MXenes. MXene materials are a class of layered two-dimensional carbon / nitrides, which are usually extracted from their parent phase material MAX phase (M n+1 AX n , n=1-3, M is a transition metal, A is a IIIA or IVA group element, and X is C or N) obtained from the atomic layer of the A layer. Owing to the rich elemental composition, tunable surface functional groups, various magnetic orders, and large spin-orbit coupling, in addition, high specific surface area, ...

Claims

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Application Information

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IPC IPC(8): C01G23/00C01G35/00C01F17/00
CPCC01G23/002C01G35/006C01P2004/03C01P2002/72C01P2004/61
Inventor 黄庆覃桂芳李勉李友兵丁浩明
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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