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A kind of method for preparing mxenes material from molten salt

A technology of molten salt and halide salt, which is applied in the field of MXenes materials, can solve problems such as long preparation time, increased cost, and greater harm, and achieve the effects of shortening reaction time, improving efficiency, and reducing production costs

Active Publication Date: 2022-03-01
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The preparation of MXenes materials is mainly obtained by using high-concentration HF solution or LiF and high-concentration HCl to generate HF in situ to etch MAX phase materials. Since HF is highly corrosive, this method is harmful to the environment and human body. Larger; in 2019, a study proposed to use molten Lewis acid salt to etch the MAX phase at 650 ° C for more than 5 hours to prepare MXenes materials, and successfully prepared Ti 3 C 2 Tx MXenes, and have good lithium storage performance, this method is safer and shorter preparation time than the HF etching method, but this method requires argon protection, which increases the cost, and needs to be kept at 650 ° C for 5 More than hours, longer preparation time

Method used

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  • A kind of method for preparing mxenes material from molten salt
  • A kind of method for preparing mxenes material from molten salt
  • A kind of method for preparing mxenes material from molten salt

Examples

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Embodiment 1

[0032] A kind of molten salt described in the present embodiment prepares the method for MXenes material, comprises the steps:

[0033] (1) First put Ti 3 AlC 2 and CuCl 2 Grind with KCl and NaCl in a molar ratio of 1:4:3:3 for 5 minutes to make the powder evenly mixed, in which Ti 3 AlC 2 0.5g, then transferred to the crucible;

[0034] (2) Grind NaCl and KCl in a molar ratio of 1:1 with a mortar for 5 minutes to make the mixture uniform, wherein NaCl is 0.1 mole, then transfer to the crucible of step (1) and cover on the mixture prepared in step (1) as a salt bed;

[0035] (3) Transfer the crucible that has been batched in step (2) to a muffle furnace and heat it to 660°C at 8°C / min and keep it at 660°C for 30min. After the heat preservation is over, stop the heating process and allow the crucible to cool with the furnace;

[0036] (4) Take out the solidified product and dissolve it with deionized water, then add ammonium persulfate (APS) to remove Cu and then filter w...

Embodiment 2

[0039] A kind of molten salt described in the present embodiment prepares the method for MXenes material, comprises the steps:

[0040] (1) First, the CuCl 2 with CaCl 2 and NaCl at a molar ratio of 4:3:3 for 5 minutes with a mortar to mix the powder evenly, among which CuCl 2 1.382g, then transferred to the crucible;

[0041] (2) CaCl 2 Grind with NaCl in a molar ratio of 1:1 for 5 minutes to make the mixture uniform, in which CaCl 2 Be 0.1 mole, transfer to the crucible of step (1) then and cover on the mixture that step (1) prepares as salt bed;

[0042] (3) Transfer the crucible that has been prepared in step (2) to a muffle furnace and heat it to 660°C at 8°C / min. 2 After melting the mixed salt with NaCl, add 0.5g Ti 3 AlC 2 , and then keep it warm for 20 minutes, stop the heating program after the heat preservation is over and take out the crucible to make it air-cooled;

[0043] (4) Take out the solidified product and dissolve it with deionized water, then add a...

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Abstract

The invention specifically relates to a method for preparing MXenes material from molten salt. The halide salt is used as the salt bed, and the MAX phase, the Lewis acid salt and the halide salt are heated and melted. The MXenes material was obtained by suction filtration and drying. The method is carried out in an air atmosphere and has a short preparation time, which can significantly reduce the production cost and improve the production efficiency.

Description

technical field [0001] The invention belongs to the field of MXenes materials, in particular to a method for preparing MXenes materials from molten salts. Background technique [0002] Since the advent of MXenes materials in 2011, because of their unique two-dimensional layered structure and excellent electrical conductivity, they have broad application prospects in many fields, such as energy storage, catalysis, sewage purification, optics, etc., especially It has great application prospects in electrochemical energy storage. [0003] The preparation of MXenes materials is mainly obtained by using high-concentration HF solution or LiF and high-concentration HCl to generate HF in situ to etch MAX phase materials. Since HF is highly corrosive, this method is harmful to the environment and human body. Larger; in 2019, a study proposed to use molten Lewis acid salt to etch the MAX phase at 650 ° C for more than 5 hours to prepare MXenes materials, and successfully prepared Ti ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/921
CPCC01B32/921C01P2002/72C01P2004/03
Inventor 林紫锋刘颖陈津津
Owner SICHUAN UNIV