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Preparation method of two-dimensional transition metal carbide or nitride

A metal carbide and transition metal technology, applied in the field of preparation of two-dimensional transition metal carbides or nitrides, can solve problems such as the inability to obtain single-layer MXene nanosheets

Inactive Publication Date: 2017-05-31
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of being unable to obtain single-layer MXene nanosheets in the above-mentioned prior art, the present invention aims to provide a method for preparing two-dimensional transition metal carbides or nitrides

Method used

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  • Preparation method of two-dimensional transition metal carbide or nitride
  • Preparation method of two-dimensional transition metal carbide or nitride

Examples

Experimental program
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Embodiment 1

[0022] 1. Put Ti 2 AlC (0.1g), KOH solid (3.5g) and water (135ml) were stirred evenly, wherein, H 2 O / KOH molar ratio=120;

[0023] 2. Put the ground mixture in a hydrothermal kettle and continue to react at 200°C for 10 hours;

[0024] 3. Wash the obtained mixture with deionized water to obtain a monolayer dispersed MXene colloidal solution.

[0025] MXene in the MXene colloidal solution (Ti 3 C 2 ) Scanning electron micrographs of nanosheets such as figure 1 As shown, it can be seen that, compared with the loosely packed structure of the accordion after HF treatment, the sheet of the material obtained according to this embodiment is transparent, indicating that the MXene sheet obtained by this method is thinner and better than the HF treatment method.

[0026] MXene in the MXene colloidal solution (Ti 3 C 2 ) atomic force microscope (AFM) photo of nanosheets as figure 2 As shown, it can be seen that the thickness of the sheet is about 1.2 nanometers, which is less t...

Embodiment 2

[0028] 1. Put V 2 AlC (0.1g) and KOH solid (0.35g) are ground in the air evenly;

[0029] 2. Put the ground mixture in a hydrothermal kettle and continue to react at 180°C for 24 hours;

[0030] 3. Wash the obtained mixture with deionized water to obtain a monolayer dispersed MXene colloidal solution.

Embodiment 3

[0032] 1. Add Nb 2 AlC (0.1g) and KOH solid (3.5g) are ground evenly;

[0033] 2. Put the ground mixture in a hydrothermal kettle and continue to react at 180°C for 24 hours;

[0034] 3. Wash the obtained mixture with deionized water to obtain a monolayer dispersed MXene colloidal solution.

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Abstract

The invention relates to a preparation method of two-dimensional transition metal carbide or nitride. The preparation method comprises the following steps: uniformly mixing metal carbide or metal nitride with strong alkali to obtain a mixture, wherein the metal carbide or the metal nitride is selected from at least one in the group consisting of Ti2AlC, Ti3AlC2, Ti3SiC2, Ti4SiC3, Ti2AlN, V2AlC, V3AlC2, V4AlC3, V4SiC3, Nb2AlC, Nb4AlC3, Nb4SiC3, Ta2AlC, Ta3AlC2 and Ta3SiC2; the strong alkali is selected from at least one in the group consisting of KOH, RbOH and CsOH; washing the mixture by use of deionized water to obtain a single-layer dispersed two-dimensional transition metal carbide or nitride colloidal solution. The preparation method disclosed by the invention is an environmental-friendly and pollution-free method for obtaining a single-layer two-dimensional nanometer lamella.

Description

technical field [0001] The invention relates to two-dimensional transition metal carbides or nitrides, and more particularly to a preparation method of two-dimensional transition metal carbides or nitrides. Background technique [0002] MAX is a metal carbide or metal nitride containing C or N, and its chemical formula is M n+1 AX n , where 'M' represents transition metal elements (Ti, Nb, V, Ta, etc.), 'A' is mainly the third and fourth main group elements (Al, Si, etc.), and 'X' is carbon or nitrogen. A new type of two-dimensional nanomaterial called two-dimensional transition metal carbide or nitride (MXene) can be obtained by selectively etching the elements of layer A in the precursor MAX phase by chemical method. This two-dimensional nanomaterial has unique and excellent mechanical, electronic, and magnetic properties. Ti with Al element 3 AlC 2 Phase as an example, the Ti 3 AlC 2 The powder is added to a certain concentration of HF aqueous solution and stirred ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/06C01B32/914C01B32/921B82Y30/00B82Y40/00
CPCC01B21/06B82Y30/00B82Y40/00C01P2004/03C01P2004/04
Inventor 李亮李庚南谭理张宇萌
Owner EAST CHINA UNIV OF SCI & TECH
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