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Preparation method of multilayered two-dimensional lamellar transition metal carbide material MXene

A transition metal, two-dimensional layered technology, applied in carbides, carbon compounds, chemical instruments and methods, etc., can solve the problems of less applied research, serious environmental pollution, dangerous operation, etc., to improve preparation efficiency and structure stability. Good performance and clear layer spacing

Inactive Publication Date: 2018-08-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of two-dimensional layered transition metal carbides is mainly prepared by hydrofluoric acid etching. This method is dangerous to operate and seriously pollutes the environment, and the transition metal carbides of a single layer cannot be prepared, and the efficiency is low.
At present, domestic research on two-dimensional layered transition metal carbides MXene is mainly in supercapacitors, sensors, catalysts, etc., and there are few applications in the fields of rubber and plastics.

Method used

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  • Preparation method of multilayered two-dimensional lamellar transition metal carbide material MXene
  • Preparation method of multilayered two-dimensional lamellar transition metal carbide material MXene
  • Preparation method of multilayered two-dimensional lamellar transition metal carbide material MXene

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Dissolve 2 g of ammonium fluoride in 30 ml of concentrated hydrochloric acid (concentration: 35 wt %), and stir in a three-necked polytetrafluoroethylene flask for 5 minutes.

[0035] (2) 3gTi 3 AlC 2 Slowly added to the three-necked flask of step (1) within 10 minutes, stirred at a high speed of 300 rpm in a constant temperature oil bath at 50°C for 18h, centrifuged to remove the supernatant, and dried in vacuum at 50°C for 10h.

[0036] (3) the two-dimensional transition metal carbide Ti obtained in step (2) 3 C 2 Add 15ml of dimethyl sulfoxide solvent and stir for 1.5h, centrifuge to remove the supernatant, and vacuum dry at 50°C for 10h.

[0037] (4) Ti obtained by step (3) 3 C 2 Mix it with 80ml of deionized water, add it to a multi-functional microreactor, and conduct a hydrothermal reaction at a high temperature of 175°C for 35 minutes, collect the product in the reactor, and obtain a two-dimensional layered transition metal carbide Ti 3 C 2 .

[0038...

Embodiment 2

[0041] (1) Weigh 2g of ammonium fluoride and dissolve it in 30ml of concentrated hydrochloric acid (concentration: 35wt%), and stir in a three-necked polytetrafluoroethylene flask for 10 minutes.

[0042] (2) 3gTi 2 AlC was slowly added to the three-neck flask in step (1) within 10 minutes, stirred at a high speed of 300 rpm in a constant temperature oil bath at 50°C for 18h, centrifuged to remove the supernatant, and dried in vacuum at 50°C for 10h.

[0043] (3) the two-dimensional transition metal carbide Ti obtained in step (2) 2 C was added to 15ml of dimethyl sulfoxide solvent and stirred for 1.5h, centrifuged to remove the supernatant, and dried in vacuum at 50°C for 10h.

[0044] (4) Ti obtained by step (3) 2 C was mixed with 80ml deionized water, added to a multi-functional micro-reactor and hydrothermally reacted at a high temperature of 175°C for 35 minutes, and the product in the reactor was collected to obtain a two-dimensional layered transition metal carbide Ti...

Embodiment 3

[0048] (1) Weigh 2g of ammonium fluoride and dissolve it in 30ml of concentrated hydrochloric acid (concentration: 35wt%), and stir in a three-necked polytetrafluoroethylene flask for 10 minutes.

[0049] (2) 3gTi 4 SiC 3 Slowly added to the three-necked flask of step (1) within 10 minutes, stirred at a high speed of 300 rpm in a constant temperature oil bath at 50°C for 18h, centrifuged to remove the supernatant, and dried in vacuum at 50°C for 10h.

[0050] (3) the two-dimensional transition metal carbide Ti obtained in step (2) 4 C 3 Add 15ml of dimethyl sulfoxide solvent and stir for 1.5h, centrifuge to remove the supernatant, and vacuum dry at 50°C for 10h.

[0051] (4) Ti obtained by step (3) 4 C 3 Mix it with 80ml of deionized water, add it to a multi-functional microreactor, and conduct a hydrothermal reaction at a high temperature of 175°C for 35 minutes, collect the product in the reactor, and obtain a two-dimensional layered transition metal carbide Ti 4 C 3 ...

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Abstract

The invention discloses a preparation method of a multilayered two-dimensional lamellar transition metal carbide material MXene and belongs to the field of carbide composite materials. The two-dimensional lamellar transition metal carbide material MXene takes one or more of Ti3AlC2, Ti2AlC, Ti3SiC2 and Ti4SiC3 as a base material and the base material is heated and stirred under a reaction environment of ammonium fluoride and hydrochloric acid; then a reaction product is centrifuged until the pH (Potential of Hydrogen) is nearly neutral and then is transferred into a dimethyl sulfoxide solvent;after the reaction product is stirred, the reaction product is added into a multifunctional mini-type reactor to prepare two-dimensional lamellar transition metal carbide. The preparation method hasthe advantages of simple preparation process, safety and convenience for operation and small pollution and a two-dimensional lamellar structure with uniform composition and structure is prepared. Thetwo-dimensional lamellar material disclosed by the invention has clear inter-lamellar spacing and good structure stability.

Description

technical field [0001] The invention belongs to the field of carbide composite materials, in particular to a method for preparing a multi-layer two-dimensional layered transition metal carbide material MXene. Background technique [0002] At present, there are more and more two-dimensional materials. Due to its excellent performance, it has attracted extensive research attention. The most studied two-dimensional material is graphene, which has high intrinsic mobility, good conductivity and excellent The stability of mechanical properties enables flexible and wide-ranging applications. However, the new two-dimensional layered transition metal carbide MXene has the characteristics of high specific surface area and high electrical conductivity of graphene, and has the advantages of flexible and adjustable components and controllable minimum nanometer layer thickness. It has been used in energy storage, adsorption, sensors, Areas such as conductive fillers show great potential....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/921C01B32/914
CPCC01P2002/72C01P2004/03
Inventor 贾志欣李群洋李彰杰贾德民罗远芳
Owner SOUTH CHINA UNIV OF TECH
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