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Preparation method and application of lamellar two-dimensional material MXene

A two-dimensional material, layered technology, applied in the field of chemical preparation, can solve the problems of complex equipment, unfavorable industrial promotion, easy operation and other problems, and achieve the effect of low equipment cost, lower threshold and complexity

Inactive Publication Date: 2017-12-29
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The equipment used in the current MXene preparation process is relatively complicated, which is not conducive to industrial promotion. In addition, the safety factor of the current preparation process is also low, and it is prone to danger during operation

Method used

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  • Preparation method and application of lamellar two-dimensional material MXene
  • Preparation method and application of lamellar two-dimensional material MXene
  • Preparation method and application of lamellar two-dimensional material MXene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment prepares the layered two-dimensional material Ti 2 c. Concrete preparation steps are as follows:

[0036] S100: Preparation of ternary material Ti by atmospheric pressure sintering process 2 AlC.

[0037] Wherein step S100 comprises following operation steps again:

[0038] S110: Weigh an appropriate amount of elemental powder Ti powder, pure Al powder and graphite powder; the Ti powder used in this example is (100 mesh, mass fraction 99.6%), and the pure Al powder is (200 mesh, mass fraction 99.7%) And graphite powder (400 mesh, mass fraction 99.85%). The specific operation is to weigh 11.05g of Ti powder; 3.57g of pure Al powder and 1.38g of graphite powder, according to the atomic ratio M:A:X is 2:1.15:1. The Al above the stoichiometric number here is mainly to prevent the evaporation of Al during the sintering process. What needs to be explained here is that the ratio of the elemental powder can be arbitrary, and the elemental powder exceeding ...

Embodiment 2

[0052] This embodiment prepares the layered two-dimensional material Ti 2 c. Concrete preparation steps are as follows:

[0053] S100: Preparation of ternary material Ti by atmospheric pressure sintering process 2 AlC.

[0054] Wherein step S100 comprises following operation steps again:

[0055] S110: Weigh an appropriate amount of elemental powder Ti powder, pure Al powder and graphite powder; the Ti powder used in this example is (100 mesh, mass fraction 99.6%), and the pure Al powder is (200 mesh, mass fraction 99.7%) And graphite powder (400 mesh, mass fraction 99.85%).

[0056] S120: uniformly mix the weighed multiple elemental powders and perform briquette processing to obtain a briquette. Before the briquetting process, it is best to use a high-speed ball mill to mill the mixture for 5-30 hours. The purpose of the ball milling process is to obtain a mixed powder with uniform particles. The briquetting treatment in this embodiment is to briquette the mixed powder ...

Embodiment 3

[0071] This embodiment prepares the layered two-dimensional material Ti 2 c. Concrete preparation steps are as follows:

[0072] S100: Preparation of ternary material Ti by atmospheric pressure sintering process 2 AlC. This step is the same as in Embodiment 1. But the atmospheric pressure sintering is carried out under the protection of nitrogen.

[0073] S200: Ternary material Ti obtained by sintering at atmospheric pressure 2 AlC is crushed into powder.

[0074] S300: Using HNO 3 Mix KF to perform etching treatment on the powder, and the etching treatment time is 50 hours.

[0075] The specific operation steps of etching treatment are: take 30 mL 6 M HNO 3 solution, 1.98 g of KF (analytical grade) was added to it. The sample powder obtained in step S200 is divided into several times, and a small amount is slowly added to the mixed etching solution each time, and magnetic stirring is performed at the same time to prevent bumping. The corrosion process lasted for 50 ...

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Abstract

The invention provides a preparation method of a lamellar two-dimensional material MXene. The preparation method comprises the following steps: S100: preparing a ternary material Mn+1AXn by adopting a normal-pressure sintering technology, wherein M is transition metal, A is a third or fourth main group element, X is an element C or N and n is 1, 2 or 3; S200: crushing the ternary material Mn+1AXn which is obtained by normal-pressure sintering into powder; S300: carrying out etching treatment on the powder, wherein the time for the etching treatment is 8h to 50h; S400: carrying out washing treatment and drying treatment on a powder mixed solution subjected to the etching treatment to obtain the lamellar two-dimensional material MXene. According to the preparation method provided by the invention, a pressurizing flow in a high-temperature process is replaced through a separation and pressurization and heating manner, so that the threshold and the complexity of preparing a precursor are reduced. Furthermore, equipment used for normal-pressure sintering is relatively low, so that the preparation method is especially suitable for industrial production.

Description

technical field [0001] The invention relates to the field of chemical preparation, in particular to a method for preparing a layered two-dimensional material MXene. Background technique [0002] In recent years, layered two-dimensional materials (2D materials) have attracted extensive attention from the scientific research community due to their unique properties and great application potential. Since the discovery of the first two-dimensional material, graphene, more and more materials have joined the ranks, such as boron nitride, chalcogenides (TMDs), some metal oxides, and hydroxides. MXenes, or two-dimensional layered transition metal carbides, nitrides, or carbonitrides, are the latest of these materials. Some special properties of this material have also attracted extensive attention in recent years. Two-dimensional metal (transition metal) carbide, carbonitride - MXene, is a new two-dimensional layered material jointly researched and prepared by Yury Gogotsi and Mic...

Claims

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Application Information

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IPC IPC(8): C01B32/921C01B32/90
CPCC01P2002/72C01P2004/03C01P2004/20C01P2004/61C01P2006/40
Inventor 黄青松刘文韬齐瑞峰
Owner SICHUAN UNIV
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