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MXene nanosheet with free radical capturing function as well as preparation method and application of MXene nanosheet

A technology of free radicals and nanosheets, applied in the field of MXene nanosheets and their preparation, can solve the problems of MXene nanosheets with great influence on the electrical conductivity and thermoelectric effect, stacking and agglomeration of MXene nanosheets, complicated operation process, etc., and achieve excellent electrical conductivity. Effects of performance and pyroelectric sensing properties, short response time, and simple preparation method

Active Publication Date: 2022-04-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) The method of controlling the storage environment and improving the etching method is to enhance the oxidation stability of MXene nanosheets by reducing the defect density on the surface of the sheet, but the effect is not ideal;
[0005] 2) The terminating groups on the surface of MXene nanosheets can be adjusted by annealing in a reducing atmosphere, but the operation process is more complicated, and it is easy to cause stacking and agglomeration of MXene nanosheets;
[0006] 3) Although the physical packaging method can greatly improve the stability of MXene nanosheets, due to the existence of metal oxides and other groups, it has a great influence on the electrical conductivity and thermoelectric effect of MXene nanosheets

Method used

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  • MXene nanosheet with free radical capturing function as well as preparation method and application of MXene nanosheet
  • MXene nanosheet with free radical capturing function as well as preparation method and application of MXene nanosheet
  • MXene nanosheet with free radical capturing function as well as preparation method and application of MXene nanosheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055]A kind of MXene nano sheet with free radical trapping function, its preparation method comprises the following steps:

[0056] 1) Add 10g of titanium carbide MXene (sheet diameter is about 3μm, interlayer distance is about 0.2nm) into 20mL of deionized water, and then placed in an ice-water bath for ultrasonic dispersion for 1.5h, ultrasonic power is 400W, to obtain MXene dispersion ;

[0057] 2) Add 3.3 g of tannic acid dropwise to the MXene dispersion, stir at room temperature for 48 hours, and then perform suction filtration. The filtered solid is washed 3 times with absolute ethanol and then freeze-dried for 48 hours to obtain a free radical capture function. MXene nanosheets (referred to as F-MXene).

[0058] Performance Testing:

[0059] 1) The scanning electron microscope (SEM) image of F-MXene is as follows figure 1 shown.

[0060] Depend on figure 1 It can be seen that after titanium carbide MXene is modified by tannic acid, the interlamellar force becomes ...

Embodiment 2

[0078] A kind of MXene nano sheet with free radical trapping function, its preparation method comprises the following steps:

[0079] 1) Add 10 g of niobium carbide MXene (sheet diameter is about 3 μm, layer spacing is about 0.1 nm) into 20 mL of acetone-deionized water mixed solvent (the volume ratio of acetone and deionized water is 1:1), and then Put it in an ice-water bath for ultrasonic dispersion for 3 hours, and the ultrasonic power is 400W to obtain the MXene dispersion;

[0080] 2) Add 1 g of tannic acid dropwise to the MXene dispersion, stir at room temperature for 48 hours, and then perform suction filtration. The filtered solid is washed 3 times with absolute ethanol and then freeze-dried for 48 hours to obtain the MXene with free radical capture function. MXene nanosheets (referred to as F-MXene).

[0081] A kind of intelligent fireproof material, its preparation method comprises the following steps:

[0082] 1) Disperse the MXene nanosheets with free radical tr...

Embodiment 3

[0087] A kind of MXene nano sheet with free radical trapping function, its preparation method comprises the following steps:

[0088] 1) Add 10 g of vanadium carbide MXene (sheet diameter is about 8 μm, interlayer distance is about 2 nm) into 20 mL of acetone, and then ultrasonically disperse at 10 ° C for 1 h, and the ultrasonic power is 400 W to obtain the MXene dispersion;

[0089] 2) Add 20 g of phytic acid dropwise to the MXene dispersion, stir at room temperature for 24 hours, and then perform suction filtration. The filtered solid is washed 3 times with absolute ethanol and then freeze-dried for 8 hours to obtain MXene with free radical capture function. Nanosheets (referred to as F-MXene).

[0090] A kind of intelligent fireproof material, its preparation method comprises the following steps:

[0091] 1) Disperse the MXene nanosheets with free radical trapping function in acetone to make a dispersion with a concentration of 30mg / mL;

[0092] 2) Immerse the polyuretha...

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Abstract

The invention discloses an MXene nanosheet with a free radical capturing function as well as a preparation method and application of the MXene nanosheet. The preparation method of the MXene nanosheet with the free radical capturing function comprises the following steps: 1) adding MXene into a solvent, and carrying out ultrasonic dispersion to obtain an MXene dispersion liquid; and 2) adding organic acid into the MXene dispersion liquid, and stirring to obtain the MXene nanosheet with the free radical capturing function. The MXene nanosheet has an excellent free radical capturing function, not only has excellent storage stability in a water-oxygen environment, but also can quench high-activity peroxy free radicals, inhibit a combustion reaction and play an efficient flame-retardant role during combustion, and also has excellent conductivity and thermoelectric sensing characteristics; the method can be used in the fields of motion monitoring, temperature sensing, fire early warning and the like, and has a very wide application prospect.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to an MXene nanosheet with a free radical capture function and a preparation method and application thereof. Background technique [0002] The two-dimensional layered nanomaterial MXene is an emerging two-dimensional inorganic compound composed of transition metal carbides, nitrides or carbonitrides with a thickness of several atomic layers, which has high specific surface area, metal conductivity, thermoelectric The sensing properties, hydrophilicity, and rich surface chemical properties have attracted extensive attention from scholars at home and abroad, and have shown good application prospects in the fields of adsorption, sensing, catalysis, energy storage, electromagnetic shielding, and intelligent fire protection. However, MXene nanosheets have some structural defects, and are embedded with active transition metals and termination groups, and the edges and defects of MXe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/921C01B32/914B82Y40/00B27K3/04B27K5/04D06M11/74D06M13/207D06M15/643C08J9/40C08J9/42C08J7/05C08J7/06C09D1/00C09D183/04C09D5/18D06M101/06
Inventor 赖学军王冰林曾幸荣李红强邓惠琳马文杰张安强雷雨风
Owner SOUTH CHINA UNIV OF TECH
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