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Preparation method of two-dimensional Ti2AlC nanosheets

A technology of nanosheets and powders, which is applied in the field of preparation of two-dimensional Ti2AlC nanosheets, can solve the problems of high risk factor, complicated steps, and harsh preparation conditions, and achieve the effects of avoiding agglomeration, simple operation, and simple equipment structure

Active Publication Date: 2017-01-11
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above preparation methods either use HF acid, which has a high risk factor, or solid solution synthesis, and the preparation conditions are harsh and the steps are complicated.

Method used

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  • Preparation method of two-dimensional Ti2AlC nanosheets
  • Preparation method of two-dimensional Ti2AlC nanosheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step 1: Put 2.5gTi 2 AlC powder is added to 250mlN,N dimethylformamide (DMF) to form a mixture, mixed and stirred at room temperature, and mechanically sheared by a high-speed shear emulsifier, with a mechanical speed of 8000r / min and a shearing time of 2h ;

[0020] Step 2: Centrifuge the solution obtained after shearing at low speed at 2500r / min. Take out the supernatant and filter with suction to obtain two-dimensional Ti 2 AlC nanosheets.

Embodiment 2

[0022] Step 1: Add 1.25gTi 2 AlC powder was added to 250ml of hydrazine hydrate (HM) solvent to form a mixture, mixed and stirred at room temperature, and mechanically sheared by a high-speed shear emulsifier, with a mechanical speed of 4000r / min and a shearing time of 12h;

[0023] Step 2: Centrifuge the solution obtained after shearing at a low speed at 1500r / min, take out the supernatant and filter with suction to obtain two-dimensional Ti 2 AlC nanosheets.

[0024] figure 1 Two-dimensional Ti prepared in Example 2 2 Transmission electron microscopy (TEM) and selected area electron diffraction (SAED) images of AlC nanosheets. It can be seen from the figure that the two-dimensional nanosheet obtained by the present invention shows regular diffraction spots, indicating that it is a single crystal.

[0025] figure 2 Two-dimensional Ti prepared in Example 2 2 High-resolution transmission electron micrograph of AlC nanosheets. After measurement, the lattice fringe spacing is 0.2329n...

Embodiment 3

[0027] Step 1: Add 2.0gTi 2 AlC powder was added to 250ml of N-methylpyrrolidone (NMP) to form a mixture, mixed and stirred at room temperature, and mechanically sheared by a high-speed shear emulsifier at a mechanical speed of 6000r / min and a shearing time of 8h;

[0028] Step 2: Centrifuge the solution obtained after shearing at a low speed at 2000r / min. Take out the supernatant and filter with suction to obtain two-dimensional Ti 2 AlC nanosheets.

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Abstract

The invention discloses a preparation method of two-dimensional Ti2AlC nanosheets. Firstly, a mixture is prepared from Ti2AlC powder and a dispersion solvent in a certain mass ratio, and mechanical shearing is performed in a room-temperature environment at a certain mechanical rotating speed; secondly, a solution obtained after shearing is centrifuged at a low rotating speed, a liquid supernatant is taken out and subjected to suction filtration, and the two-dimensional Ti2AlC nanosheets are obtained. The two-dimensional Ti2AlC nanosheets can be obtained through mechanical shearing assisted liquid phase stripping, and the preparation method has the characteristics that the preparation conditions are mild, the operation is simple and the repeatability is high.

Description

Technical field [0001] The invention belongs to the technical field of nano material preparation, and particularly relates to a two-dimensional Ti 2 Preparation method of AlC nanosheets. Background technique [0002] MXenes is a general term for a type of two-dimensional nano-transition metal carbon / nitrides. The thickness of a single layer of MXene is usually below 1nm. Typical MXenes are Ti 3 C 2 , Ti 2 C, Ta 4 C 3 , Nb 2 C, V 2 C, Ti 3 CN. The precursor MAX phase is a three-dimensional layered crystal, usually expressed as M n+1 AX n (n=1, 2, 3), where M represents a transition metal element, A is mainly an element of the third or fourth main group, and X is a carbon element or a nitrogen element. The two-dimensional material MXenes generally has good electrical conductivity and has good application prospects in the fields of sensing, electronic devices, catalysis, and electrochemical energy storage systems. The preparation of MXenes nanosheets with few or single layers from ...

Claims

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Application Information

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IPC IPC(8): C01G23/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G23/002C01P2002/01C01P2002/70C01P2004/64
Inventor 刘毅李樊李莹欣张利锋郭守武
Owner SHAANXI UNIV OF SCI & TECH
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