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Method for preparing laminated MXenes material from ternary MAX materials

A layered and raw material technology, applied in the field of preparation of special layered materials, can solve the problems of uneven corrosion, low corrosion yield, long corrosion time, etc., to achieve good results, strong operability, and good microscopic appearance. Effect

Active Publication Date: 2017-09-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small distance between the original MAX sheets, the corrosion products are difficult to be discharged smoothly, which will hinder the mutual contact between the reactants of the A layer and HF, resulting in long corrosion time, slow corrosion process, and low corrosion yield. Uneven corrosion, complete erosion, etc.

Method used

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  • Method for preparing laminated MXenes material from ternary MAX materials
  • Method for preparing laminated MXenes material from ternary MAX materials
  • Method for preparing laminated MXenes material from ternary MAX materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Ti, Al, C, Nb 2 o 5 And the compound K salt is mixed evenly with wet ball milling to obtain a mixture; the specific raw material ratio is shown in Table 1 below, KCl in the compound potassium salt: K 2 SO 4 The molar ratio of the compound potassium salt is 2:1, and the dosage of the compound potassium salt is twice the total weight of all other raw materials.

[0034] The weight percentage of each raw material of table 1 embodiment 1

[0035] Ti Al C Nb 2 o 5

total wt.% 62.5 23 11 3.5 100

[0036] The mixed material was prepared into a slurry with absolute ethanol, and the absolute ethanol:mixed material (mass ratio) was 2.2:1; the slurry was mixed uniformly by ball milling for 2.5 hours. Put the mixed raw materials into a drying oven at a drying temperature of 40°C to prevent oxidation of the raw materials when the temperature is too high. After the ethanol is completely volatilized, the raw materials are ground and pulveriz...

Embodiment 2

[0044] 1) Combine Cr, Al, C, Nb 2 o 5 And the compound K salt is mixed evenly with wet ball milling to obtain a mixture, and the specific raw material ratio is shown in Table 2 below. In the compound potassium salt, KCl: K 2 SO 4 The molar ratio of the compound potassium salt is 1.8:1, and the dosage of the compound potassium salt is twice the total weight of other raw materials.

[0045] The weight percent of each raw material of table 2 embodiment 2

[0046] Cr Al C V 2 o 5

total wt.% 58.5 26 12 3.5 100

[0047] The mixed material was prepared into a slurry with absolute ethanol, and the absolute ethanol:mixed material (mass ratio) was 2.2:1; the slurry was mixed uniformly by ball milling for 2.5 hours. Put the mixed raw materials into a drying oven at a drying temperature of 40°C to prevent oxidation of the raw materials when the temperature is too high. After the ethanol is completely volatilized, the raw materials are ground and pu...

Embodiment 3

[0051] 1) Ti, Mo, Al, C, Al 2 o 3 And the compound K salt is mixed evenly with wet ball milling to obtain a mixture, and the specific raw material ratio is shown in Table 3 below. In the compound potassium salt, KCl: K 2 SO 4 The molar ratio of the compound potassium salt is 4:1, and the dosage of the compound potassium salt is twice the total weight of other raw materials.

[0052] The weight percent of each raw material of table 3 embodiment 3

[0053] Ti Mo Al C Al 2 o 3

total wt.% 24 32.5 27 12 4.5 100

[0054] The mixed material was prepared into a slurry with absolute ethanol, and the absolute ethanol:mixed material (mass ratio) was 2.2:1; the slurry was mixed uniformly by ball milling for 2.5 hours. Put the mixed raw materials into a drying oven at a drying temperature of 40°C to prevent oxidation of the raw materials when the temperature is too high. After the ethanol is completely volatilized, the raw materials are ground a...

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Abstract

The invention provides a method for preparing a laminated MXenes material from ternary MAX materials. Corrosion liquid is added into a pressure container; then, ternary MAX material powder is added into the corrosion liquid; the pressure container is sealed; through external gas pressure, a corrosion environment with the pressure higher than the atmospheric pressure is formed in the pressure container; corrosion is performed under the stirring condition at the corrosion liquid temperature of 4 to 60 DEG C; after the corrosion, the pressure is fast relieved; washing and drying are performed; the laminated MXenes materials are obtained. The method has the advantages that simplicity is realized; the operability is high; the realization result is good; the Mxenes material with good microtopography and high peeling degree can be obtained.

Description

technical field [0001] The invention relates to a preparation process of a special layered material, in particular to a method for preparing a layered MXenes material by using a ternary MAX material. Background technique [0002] Since the discovery of graphene in 2004, two-dimensional nanomaterials (two-dimensional nanomaterials) have attracted widespread attention due to their unique properties. Huge application potential. At present, the commonly used preparation methods can be divided into two categories, bottom-up synthesis method and top-down exfoliation method, that is, two-dimensional layered materials are obtained by growing zero-dimensional or one-dimensional materials or exfoliated from three-dimensional materials. Crystal (layered material) exfoliation in liquid phase system is a common method for the controllable preparation of two-dimensional nanomaterials. MAX material is a new type of three-dimensional layered crystal with layered structure, and its general...

Claims

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Application Information

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IPC IPC(8): C01B32/921C01B32/914C01B32/90B82Y30/00
CPCB82Y30/00C01P2002/72C01P2004/03
Inventor 张佩朱浩南方媛秦毅朱建锋武文玲方园
Owner SHAANXI UNIV OF SCI & TECH
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