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Preparation method of three-dimensional MXene

A three-dimensional, inert gas technology, applied in chemical instruments and methods, tungsten/molybdenum carbides, inorganic chemistry, etc., can solve the problems of restricting large-scale production and application, easy pollution of the environment, harsh conditions, etc., to achieve favorable ion Transmission and electron conduction, green and pollution-free cost, simple and easy operation

Inactive Publication Date: 2018-07-27
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Three-dimensional MXene is a three-dimensional porous material obtained through structural optimization of two-dimensional MXene. It has a three-dimensional network structure, high porosity, and high specific surface area, which overcomes the problems of MXene's easy agglomeration, stacking, and poor conductivity between sheets.
There are safety problems in the preparation process of alkalization method, because KOH is a strong base with strong corrosiveness
However, the solvothermal method needs to add organic solvent (ethylenediamine), which is easy to cause pollution to the environment, and its conditions are harsh and the preparation process is relatively cumbersome, which limits its large-scale production and application to a certain extent.

Method used

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  • Preparation method of three-dimensional MXene

Examples

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Effect test

Embodiment 1

[0020] A three-dimensional Ti 3 C 2 The preparation method, under the protection of inert gas argon, 0.4g of two-dimensional Ti 3 C 2 The powder was placed in boiled 100mL deionized water, and ultrasonically dispersed for 30min with a cell pulverizer to form a two-dimensional Ti 3 C 2 Dispersion liquid, ultrasonically dispersed two-dimensional Ti 3 C 2 Pour the dispersion liquid into the plate that has been protected by argon for 30 minutes before, continue to pass argon for about 10 minutes, and pour the prepared liquid nitrogen on the Ti 3 C 2 The surface of the dispersion liquid is instantly frozen, and the frozen material is wrapped with tin foil and then placed in a freeze dryer and dried at minus 40°C for 150 hours to obtain a three-dimensional Ti 3 C 2 .

[0021] The Ti used in this example 3 C 2 It was prepared with reference to Zhang C, Anasori B, Seral‐Ascaso A, et al. Transparent, Flexible, and Conductive 2D Titanium Carbide (MXene) Filmswith High Volumet...

Embodiment 2

[0024] A three-dimensional Ti 2 The preparation method of C, under the protection of inert gas argon, 0.6g commercially available two-dimensional Ti 2 C powder was placed in boiled 100mL deionized water, and ultrasonically dispersed for 60min with an ultrasonic cleaner to form two-dimensional Ti 2 N dispersion liquid, ultrasonically dispersed two-dimensional Ti 2 Pour the C dispersion into the plate that has been protected by argon for 30 minutes before, continue to pass argon for about 10 minutes, and pour the prepared liquid nitrogen on the Ti 2 The surface of the dispersion of C is instantly frozen, and the frozen material is wrapped with tin foil and then placed in a freeze dryer and dried at minus 35°C for 100 hours to obtain a three-dimensional Ti 2 c.

Embodiment 3

[0026] A three-dimensional Mo 2 The preparation method of C, under the protection of inert gas nitrogen, 1.0g commercially available two-dimensional Mo 2 C powder was placed in 100mL ethanol deoxygenated, and ultrasonically dispersed with an ultrasonic cleaner for 90min to form two-dimensional Mo 2 C dispersion liquid, ultrasonically dispersed two-dimensional Mo 2 C dispersion is poured into the PTFE beaker that has been protected by nitrogen gas for 30 minutes before, continue to pass nitrogen gas for about 10 minutes, seal the beaker and put it in a refrigerator at minus 80°C for rapid freezing. The frozen material is wrapped with tin foil and then placed. Dry in a freeze dryer at minus 50°C for 60 hours to obtain three-dimensional Mo 2 c.

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Abstract

The invention discloses a preparation method of three-dimensional MXene and belongs to the technical field of functional materials. The preparation method comprises the following steps: dispersing two-dimensional MXene into a solvent according to the mass / volume ratio (g to mL) of (0.2 to 1) to 100 under the protection of inert gas; carrying out ultrasonic dispersion for 30 to 90min to form a two-dimensional MXene dispersion solution; then freezing; after freezing, drying in a freezing dryer to obtain three-dimensional MXene. The method disclosed by the invention has the advantages of simplicity in operation, moderate preparation conditions, greenness and no pollution and low cost; laminar stacking problems in two-dimensional laminar MXene preparation and application processes can be solved; the prepared three-dimensional MXene has a three-dimensional porous net-shaped structure and a high specific surface area.

Description

technical field [0001] The invention specifically relates to a preparation method of a three-dimensional porous MXene material, which belongs to the technical field of functional materials. Background technique [0002] Three-dimensional MXene is a three-dimensional porous material obtained by optimizing the structure of two-dimensional MXene. It has a three-dimensional network structure, high porosity, and high specific surface area, which overcomes the problems of easy agglomeration, stacking, and poor conductivity between sheets of MXene. It has good application prospects in the fields of photoelectrocatalysis, energy storage, adsorption and flame retardancy. At present, its preparation methods mainly include alkalization method and solvothermal method. There are safety problems in the preparation process of alkalization method, because KOH is a strong base and has strong corrosiveness. However, the solvothermal method needs to add organic solvent (ethylenediamine), whi...

Claims

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Application Information

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IPC IPC(8): C01B32/921C01B32/949C01B32/914C01B32/907C01B21/076C01B21/082
CPCC01B21/0768C01B21/0828C01P2004/03C01P2002/72C01P2006/40
Inventor 廉培超李华梅毅杨鹏龙超孙娅
Owner KUNMING UNIV OF SCI & TECH
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