Preparation method of a two-dimensional layered transition metal nanosheet gel

A transition metal, two-dimensional layered technology, applied in the direction of gel preparation, chemical instruments and methods, colloid chemistry, etc., can solve the problems of high cost, long preparation time, complicated preparation process, etc., and save the trouble of removing impurities Process, good conductivity, fast preparation process

Active Publication Date: 2022-02-25
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
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Problems solved by technology

Two-dimensional layered transition metal nanosheet hydrogels are usually prepared by self-assembly method, solution mixing method, in-situ polymerization method or chemical reduction method. Long time and high cost are not conducive to retaining the excellent physical and chemical properties of two-dimensional layered transition metal nanosheets
[0004] The highly isotropic hydrogel skeleton network has strong conductivity in all directions, and its structure is stable, which facilitates the transport of substances between networks. However, its preparation is difficult, and it is difficult to ensure the conductivity of hydrogels by traditional methods. While building a stable three-dimensional network, to achieve its isotropy

Method used

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  • Preparation method of a two-dimensional layered transition metal nanosheet gel
  • Preparation method of a two-dimensional layered transition metal nanosheet gel
  • Preparation method of a two-dimensional layered transition metal nanosheet gel

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preparation example Construction

[0030] The invention provides a preparation method of a two-dimensional layered transition metal nanosheet gel, such as figure 1 shown, including the following steps:

[0031] Step S1: providing two-dimensional layered transition metal nanosheets (MXene nanosheets) with specific functional groups as a solute, and dissolving the two-dimensional layered transition metal nanosheets in a solvent to form a nanodispersion.

[0032] Specifically, the specific functional groups in the two-dimensional layered transition metal nanosheets with specific functional groups may be carboxyl, hydroxyl, ether, ester, ketone, carbonyl, acid anhydride, epoxy functional groups, fluorine, sulfonic acid groups , one or more of amino groups, secondary amines, tertiary amines and aromatic functional groups. The above-mentioned specific functional groups in the two-dimensional layered transition metal nanosheets with specific functional groups can improve the dispersion of the two-dimensional layered ...

Embodiment 1

[0050] Disperse the two-dimensional layered transition metal nanosheets in water to form a 2mg / mL aqueous solution of two-dimensional layered transition metal nanosheets, measure 2mL of the aqueous solution of two-dimensional layered transition metal nanosheets and place it in a 5mL centrifuge tube , with FeCl 2 As a metal ion cross-linking agent, add 0.2 mL of 5 mg / mL FeCl to the aqueous solution of two-dimensional layered transition metal nanosheets 2 solution, the reaction temperature was room temperature, and then allowed to stand. The obtained products were subjected to conductivity tests and electrochemical tests in different directions.

Embodiment 2

[0052] Disperse the two-dimensional layered transition metal nanosheets in water, configure a 3mg / mL aqueous solution of two-dimensional layered transition metal nanosheets, measure 2mL of the aqueous solution of two-dimensional layered transition metal nanosheets and place it in a 5mL centrifuge tube , with FeCl 2 As a metal ion cross-linking agent, add 0.2 mL of 5 mg / mL FeCl to the aqueous solution of two-dimensional layered transition metal nanosheets 2 solution, the reaction temperature was room temperature, and then allowed to stand. The obtained products were subjected to conductivity tests and electrochemical tests in different directions.

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Abstract

The invention provides a preparation method of a two-dimensional layered transition metal nanosheet gel, comprising the following steps: providing a two-dimensional layered transition metal nanosheet with a specific functional group as a solute, and using the two-dimensional layered transition metal nanosheet Dissolved in a solvent to form a nano-dispersion; provide a cross-linking agent solution containing a metal ion cross-linking agent, the metal ion cross-linking agent includes positive divalent or positive trivalent metal ions, and combine the cross-linking agent solution with the The nano-dispersion liquid is mixed, and the two-dimensional layered transition metal nanosheet gel is formed after mixing.

Description

technical field [0001] The invention relates to the field of chemical engineering, in particular to a method for preparing a two-dimensional layered transition metal nanosheet gel. Background technique [0002] Two-dimensional layered transition metal nanosheets are layered two-dimensional nanosheets with excellent conductivity, catalytic activity and adsorption. Gelation of two-dimensional nanosheets can effectively improve the sheet utilization of nanosheets and endow them with The advantages of hydrogels can expand the application prospects of two-dimensional layered transition metal nanosheets in the fields of energy storage, catalysis, high-strength materials, electronics, chemistry, and biological detection. [0003] However, compared with other zero-dimensional or one-dimensional materials, one of the most significant problems of two-dimensional materials is their tendency to "face-to-face" stacking. That is, macroscopically, it appears to be gel-like, but microscopi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/00
CPCB01J13/0052
Inventor 吕伟邓亚茜罗冲游从辉杨全红康飞宇
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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