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MXene black phosphorene composite sponge and preparation method thereof

A technology of composite sponge and phosphorene, applied in the field of nanomaterials, can solve the problems of loss of excellent performance of pure MXene materials, easy mutual aggregation of sheets, loss of high specific surface area, etc., and achieve good photoelectric characteristics, excellent performance, and simple equipment Effect

Active Publication Date: 2020-07-03
JIANGSU XFNANO MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the strong van der Waals force between the MXene sheets, the sheets are easy to agglomerate and lose the characteristics of high specific surface area.
In addition, MXene sheets are very sensitive to temperature (Chemistry of Materials, 29(11), 4848-4856.), and are easily oxidized to lose their excellent properties
At present, most of the MXene materials prepared are in the form of powder particles, and various binders need to be added during use, which greatly loses the excellent performance of pure MXene materials.

Method used

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  • MXene black phosphorene composite sponge and preparation method thereof
  • MXene black phosphorene composite sponge and preparation method thereof
  • MXene black phosphorene composite sponge and preparation method thereof

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preparation example Construction

[0060] Another aspect of the embodiments of the present invention provides the preparation method of the described MXene purple phosphorene composite sponge, which includes:

[0061] Add an appropriate proportion of phosphorene into the MXene dispersion under an inert atmosphere, and through a mixing process, obtain the MXene phosphorene composite dispersion;

[0062] Add a crosslinking agent to the above-mentioned MXene purple phosphorene composite dispersion, and let it stand for a period of time to make it shape;

[0063] The MXene phosphorene composite wet sponge with a certain shape obtained above is processed through a cycle freeze-drying process to obtain the MXene phosphorene composite sponge.

[0064] As one of the preferred schemes, the concentration of the MXene dispersion is 0.05mg / ml-5mg / ml.

[0065] Preferably, the described MXene dispersion comprises Ti 2 CT x , Nb 2 CT x , V 2 CT x 、TiNbCT x 、Ti 3 CNT x 、Ti 3 C 2 T x 、 Ta 4 C 3 T x or Nb 4 C 3...

Embodiment 1

[0098] (1) Preparation of MXene phosphorene mixed solution: 5 mg of phosphorene was added to 10 ml of 5 mg / ml MXene aqueous dispersion, and then argon gas was passed into the dispersion at a rate of 10 ml / min for 30 min. The dispersion liquid passed through the inert gas was magnetically stirred in a cold trap at 0° C. for 1 hour, and then placed in an ice-water bath with 100 W power for 3 hours. Finally, the ultrasonic dispersion was placed in a cold trap at -10°C for 1 hour, and then taken out and naturally returned to room temperature to obtain a uniformly dispersed MXene purple phosphorene composite dispersion.

[0099] (2) Preparation of MXene purple phosphorene composite sponge: add 1% by mass of MXene diethylamine to the mixed dispersion, and let it stand at 25° C. for 36 hours to obtain a bulk composite sponge. The composite sponges were then soaked in deionized water for 4 hours and repeated 20 times. Freeze the cleaned composite sponge in a -60°C cold trap for 30 mi...

Embodiment 2

[0102] (1) Preparation of MXene phosphorene mixed solution: Add 1 mg of phosphorene into 50 ml of 1 mg / ml MXene aqueous dispersion, and then blow argon into the dispersion at a rate of 200 ml / min for 120 min. The dispersion liquid passed through the inert gas at 0 ℃ Magnetic stirring was used in a cold trap for 2 hours, and then placed in an ice-water bath with 600W power for 0.5 hours of ultrasonication. Finally, the liquid will be ultrasonically dispersed at -10 ℃ The cold trap was left to freeze for 1.5 hours, and then it was taken out and naturally returned to room temperature to obtain a uniformly dispersed MXene phosphorene composite dispersion.

[0103] (2) Preparation of MXene purple phosphorene composite sponge: 1% of the mass of MXene diethylamine was added to the mixed dispersion liquid, and the mixture was left to stand at 25°C for 24 hours to obtain a block composite sponge. The composite sponges were then soaked in deionized water for 6 hours and repeated 10 ti...

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Abstract

The invention discloses an MXene black phosphorene composite sponge and a preparation method thereof. The MXene black phosphorene composite sponge has a three-dimensional macrostructure, has a continuous three-dimensional porous structure inside, contains micropores, mesopores and macropores, and has a specific surface area of 3-500 m<2> / g and conductivity of 0.01-1000 S / cm. The preparation methodcomprises the following steps: adding black phosphorene into an MXene dispersion under the protection of inert gas, uniformly dispersing, adding a cross-linking agent, standing, molding, carrying outsolution replacement, and carrying out circulating freeze-drying treatment to obtain the MXene black phosphorene composite sponge material. The MXene black phosphorene composite sponge provided by the invention has the advantages of high conductivity, high strength, high specific surface area and excellent photoelectric properties, and has wide application prospects in the fields of electronic information, energy environments and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to an MXene phosphorene composite sponge and a preparation method thereof. Background technique [0002] Due to their excellent physical and chemical properties, two-dimensional materials have great application prospects in the fields of catalysis, energy, and electronic information. As a new member of the two-dimensional material family, MXene has excellent electrical conductivity, high specific surface area and good hydrophilicity, making it attract much attention in the fields of information, energy and environment. The preparation of MXene generally obtains two-dimensional flakes of nanometer or micrometer size by acid etching MAX phase ceramics, but in practical applications, it is necessary to assemble microscopic MXene flakes into macroscopic bodies for practical application. However, due to the strong van der Waals force between the MXene sheets, the sheet...

Claims

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Application Information

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IPC IPC(8): C01B32/921C01B32/914C01B32/90C01B21/082C01B25/00
CPCC01B32/921C01B32/914C01B32/90C01B21/0828C01B25/003C01P2006/16C01P2006/17C01P2006/12C01P2006/14C01P2006/10C01P2006/40C01P2004/03C01P2004/04C01P2004/80Y02E60/10
Inventor 蒋旭董大鹏
Owner JIANGSU XFNANO MATERIALS TECH CO LTD
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