Two-dimensional metal carbonitride derived nano-material and preparation method therefor

A technology of metal carbonitrides and nanomaterials, applied in chemical instruments and methods, titanium compounds, alkali metal titanates, etc., can solve the problems of easy deterioration, easy stacking and agglomeration, and achieve non-deterioration, high reactivity, and specific The effect of high surface area

Active Publication Date: 2018-10-16
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of easy stacking, agglomeration and easy deterioration in the preparation and application of two-dimensional

Method used

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  • Two-dimensional metal carbonitride derived nano-material and preparation method therefor
  • Two-dimensional metal carbonitride derived nano-material and preparation method therefor
  • Two-dimensional metal carbonitride derived nano-material and preparation method therefor

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 2g Ti 3 AlC 2 Shake reaction with 200mL 40% hydrofluoric acid for 72h, centrifuge and wash with high-purity water, and vacuum-dry at 60°C for 24h to obtain accordion-shaped Ti 3 C 2 . 0.1g accordion-shaped Ti 3 C 2 with 0.67mL H 2 o 2 30mL of 1mol / L NaOH solution was mixed evenly, placed in a 50mL hydrothermal kettle, and treated at 140°C for 12h to obtain ultra-thin sodium titanate nanobelts.

[0035] The resulting accordion-shaped Ti 3 C 2 The scanning electron micrographs of the sodium titanate nanoribbons are as follows figure 1 , figure 2 As shown in a, the transmission electron microscope image of sodium titanate nanoribbons is as follows figure 2 as shown in b. from figure 1 and figure 2 It can be seen that through NaOH and H 2 o 2 Solution-processed, accordion-shaped Ti 3 C 2 It becomes a sea urchin-shaped microsphere assembled by nanoribbons, and the nanoribbons have the structural characteristics of thin thickness and narrow width.

Embodiment 2

[0037] 2g Ti 3 AlC 2Shake reaction with 200mL 40% hydrofluoric acid for 72h, centrifuge and wash with high-purity water, and vacuum-dry at 60°C for 24h to obtain accordion-shaped Ti 3 C 2 . 0.1g accordion-shaped Ti 3 C 2 with 0.67mL H 2 o 2 30mL of 1mol / L KOH solution was mixed evenly, placed in a 50mL hydrothermal kettle, and treated at 140°C for 12h to obtain ultra-thin potassium titanate nanobelts. Depend on image 3 Electron microscope photos show that, through KOH and H 2 o 2 Solution-processed, accordion-shaped Ti 3 C 2 It becomes a potassium titanate nanoribbon network structure.

Embodiment 3

[0039] 2g Ti 3 AlC 2 Shake reaction with 200mL 40% hydrofluoric acid for 72h, centrifuge and wash with high-purity water, and vacuum-dry at 60°C for 24h to obtain accordion-shaped Ti 3 C 2 . 0.1g accordion-shaped Ti 3 C 2 with 0.67mL H 2 o 2 30mL of 5mol / L NaOH solution was mixed uniformly, placed in a 50mL hydrothermal kettle, and treated at 140°C for 12h to obtain sodium titanate nanowires ( Figure 4 ).

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Abstract

The invention discloses a two-dimensional metal carbonitride derived nano-material and a preparation method therefor. The derived nano-material has a chemical composition represented as AMO, wherein Ais alkali metal, M is a transition metal element in an MXene precursor, and O is an oxygen element; and the derived nano-material has a sea-urchin-shaped microsphere structure, a porous network structure or a nano-wire microsphere structure, and ultrathin nano-ribbons or ultrafine nano-wires serve as basic structural units of the derived nano-material. The preparation method for the derived nano-material comprises the steps of treating a dense layered ternary metal carbide (MAX phase) material with an etching agent so as to prepare accordion-shaped two-dimensional MXene, and then, carrying out oxidating and alkalizing treatment on the accordion-shaped MXene material, thereby obtaining derived materials of different nanostructures. According to the method disclosed by the invention, through adopting the special layered MXene as a precursor, derived materials with a variety of unique nanostructures can be prepared in a regulated and controlled manner; and the method is easy and feasible, can be used for preparing nanostructures, which are not easily achieved by other methods, and has an important application prospect in the fields of electrochemical energy storage, catalysis, adsorption and the like.

Description

technical field [0001] The invention belongs to the field of nano energy materials, and in particular relates to a two-dimensional metal carbide derived nano material and a preparation method thereof. Background technique [0002] Two-dimensional materials represented by graphene have unusual electrical, optical and mechanical properties, and have been extensively studied in a variety of applications in the past decade. They can be used as suitable structural units to build a series of layered structures, thin films and composite materials. Although several 2D materials composed of single elements have been successfully prepared, such as graphene, silicene, germanene, and phosphorene, most 2D materials contain two or more elements, such as clay. [0003] Transition metal carbides, carbonitrides, and nitrides (MXene) are a new class of two-dimensional material family. Common MXenes include Ti 2 CT x 、Ti 3 C 2 T x and Nb 4 C 3 T x , and their chemical formula is gener...

Claims

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Application Information

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IPC IPC(8): C01G23/00
CPCC01G23/005C01P2004/03C01P2004/04C01P2004/20
Inventor 吴忠帅包信和董琰峰郑双好
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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