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MXene material with Cl as surface group and its preparation method and application

A technology of groups and uses, applied in the field of MXene materials and their preparation, can solve problems such as limiting the application prospects of MXene materials, and achieve the effect of enriching the adjustable space and making the preparation method simple and feasible

Active Publication Date: 2021-10-26
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

However, 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 other types of MXene materials (such as -Cl) have not been reported so far.
[0004] The environmental pollution and -F group brought by the traditional HF etching method greatly limit the application prospects of MXene materials

Method used

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  • MXene material with Cl as surface group and its preparation method and application
  • MXene material with Cl as surface group and its preparation method and application
  • MXene material with Cl as surface group and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0042] In this embodiment, the MXene material with Cl as the surface group is Ti 3 C 2 Cl 2 , the precursor MAX phase is Ti 3 AlC 2 , the transition metal chloride is ZnCl 2 , and these raw materials can be obtained through commercially available channels and the like. The Ti 3 C 2 Cl 2 The preparation method is as follows:

[0043] (1) Weigh ZnCl with a particle size of 500nm 2 0.15mol, Ti with a particle size of 10μm 3 AlC 2 powder 0.05mol, the above materials were ground and mixed to obtain a mixed product.

[0044] (2) Put the mixture in a corundum crucible and put it into a high-temperature tube furnace for reaction. The reaction conditions are: 400°C, 48 hours, under argon protection. After the temperature of the tube furnace dropped to room temperature, the reaction product in the crucible was taken out.

[0045] (3) Wash the reaction product with deionized water: put the reaction product into a beaker, add deionized water, stir and ultrasonically clean fo...

Embodiment 2

[0051] In this embodiment, the MXene material with Cl as the surface group is Ti 3 C 2 Cl 2 , the precursor MAX phase is Ti 3 AlC 2 , the transition metal chloride is ZnCl 2 , and these raw materials can be obtained through commercially available channels and the like. The Ti 3 C 2 Cl 2 The preparation method is as follows:

[0052] (1) Weigh ZnCl with a particle size of 800nm 2 0.3mol, Ti with a particle size of 10μm 3 AlC 2 powder 0.05mol, the above materials were ground and mixed to obtain a mixed product.

[0053] (2) Put the mixture in a corundum crucible and put it into a high-temperature tube furnace for reaction. The reaction conditions are: 600° C., 24 hours, under argon protection. After the temperature of the tube furnace dropped to room temperature, the reaction product in the crucible was taken out.

[0054] (3) Wash the reaction product with deionized water: put the reaction product into a beaker, add deionized water, stir and ultrasonically clean f...

Embodiment 3

[0058] In this embodiment, the MXene material with Cl as the surface group is Ti 3 C 2 Cl 2 , the precursor MAX phase is Ti 3 AlC 2 , the transition metal chloride is ZnCl 2 , and these raw materials can be obtained through commercially available channels and the like. The Ti 3 C 2 Cl 2 The preparation method is as follows:

[0059] (1) Weigh ZnCl with a particle size of 600nm 2 0.5mol Ti with particle size 10μm 3 AlC 2 powder 0.05mol, the above materials were ground and mixed to obtain a mixed product.

[0060](2) Put the mixture in a corundum crucible and put it into a high-temperature tube furnace for reaction. The reaction conditions are: 800°C, 1 hour, under the protection of argon. After the temperature of the tube furnace dropped to room temperature, the reaction product in the crucible was taken out.

[0061] (3) Wash the reaction product with deionized water: put the reaction product into a beaker, add deionized water, stir and ultrasonically clean for 3...

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Abstract

The invention discloses an MXene material with Cl as a surface group, a preparation method and application thereof. The molecular formula of the MXene material with Cl as the surface group is expressed as M n+1 x n Cl 2 , where M is any one or a combination of two or more elements of Sc, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and X is any one or a combination of two of C and N elements , n is 1, 2, 3 or 4. The preparation method includes: mixing a precursor MAX phase material and a transition metal chloride, performing a high-temperature reaction at 400° C. to 800° C., and then performing post-treatment to obtain an MXene material with Cl as a surface group. The preparation method of the present invention is simple, easy and environmentally friendly, and the obtained MXene material with Cl as the surface group has good applications in the fields of electrode materials for electrochemical energy storage, supercapacitor materials, electromagnetic absorption and shielding materials, catalysts, and the like.

Description

technical field [0001] The invention relates to the technical field of two-dimensional crystal materials, in particular to an MXene material with Cl 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. MXene materials are widely used in the fields of electrode materials for electrochemical energy storage, supercapacitor materials, electromagnetic absorption and shielding mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/194
CPCC01B32/194
Inventor 黄庆李勉李友兵罗侃周小兵都时禹
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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