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Preparation method of monolayer MoS2 nano-sheet solution

A nanosheet and solution technology, applied in the field of nanomaterials, can solve the problems of no clear report on the stability of single-layer MoS2 solution, harsh reaction conditions, and difficult industrialization, etc., to achieve short preparation cycle, improved solubility and dispersion, and low cost Effect

Inactive Publication Date: 2012-07-18
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction conditions are harsh, the cost is high, and it is not easy to be industrialized
At the same time, the alkyllithium compound used in the reaction is not compatible with many solvents, which makes the preparation of monolayer MoS 2 When nanosheets form nanocomposites with other metals, a more complex process is required
In addition, monolayer MoS prepared by liquid phase exfoliation 2 The stability of the solution was not clearly reported

Method used

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  • Preparation method of monolayer MoS2 nano-sheet solution
  • Preparation method of monolayer MoS2 nano-sheet solution
  • Preparation method of monolayer MoS2 nano-sheet solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 100ml of N-methylpyrrolidone solvent, add 50mg of MoS to it 2 Put the powder on a magnetic stirrer and stir for 30 minutes, transfer the solution into a 150ml hydrothermal reaction kettle, place it in an oven, set the reaction temperature to 120°C, and the reaction time to 6h. After the reaction, the solution was taken out and placed in a beaker, and 0.5 g of cetyltrimethylammonium bromide was added to the solution, and stirred on a magnetic stirrer for 30 minutes. Then place the beaker in an ultrasonic pulverizer for ultrasonic exfoliation, set the power of the ultrasonic pulverizer to 180w, and the ultrasonic time to 2h. The solution treated by the ultrasonic pulverizer was centrifuged for 2 hours, and the speed of the centrifuge was 800 rpm / h. Take the supernatant to get monolayer MoS 2 nanosheet solution.

Embodiment 2

[0021] Take 100ml N-vinylpyrrolidone, add 100mg MoS to it 2 Put the powder on a magnetic stirrer and stir for 30 minutes, transfer the solution into a 150ml hydrothermal reaction kettle, place it in an oven, set the reaction temperature to 100°C, and the reaction time to 7h. After the reaction, the solution was taken out and placed in a beaker, and 1.0 g of cetyltrimethylammonium chloride was added to the solution, and stirred on a magnetic stirrer for 30 minutes. Then place the beaker in an ultrasonic pulverizer for ultrasonic exfoliation, set the power of the ultrasonic pulverizer to 200w, and the ultrasonic time to 1h. The solution treated by the ultrasonic pulverizer was centrifuged for 1 h, and the speed of the centrifuge was 1400 rpm / h. Take the supernatant to get monolayer MoS 2 nanosheet solution.

Embodiment 3

[0023] Take 50ml of N-dodecylpyrrolidone and add 60mg of MoS to it 2 Put the powder on a magnetic stirrer and stir for 30 minutes, transfer the solution into a 150ml hydrothermal reaction kettle, place it in an oven, set the reaction temperature to 80°C, and the reaction time to 8h. After the reaction, the solution was taken out and placed in a beaker, and 1.0 g of cetyltrimethylammonium bromide was added to the solution, and stirred on a magnetic stirrer for 30 minutes. Then place the beaker in an ultrasonic pulverizer for ultrasonic exfoliation, set the power of the ultrasonic pulverizer to 200w, and the ultrasonic time to 1h. The solution treated by the ultrasonic pulverizer was centrifuged for 2 h, and the speed of the centrifuge was 1000 rpm / h. Take the supernatant to get monolayer MoS 2 nanosheet solution.

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Abstract

The invention discloses a preparation method of a monolayer MoS2 nano-sheet solution. The preparation method provided by the invention comprises the following steps of weighing MoS2 powder, putting the MoS2 powder into a pyrrolidone solvent, carrying out magnetic stirring of the mixture, transferring the stirred mixture to a hydrothermal reactor, carrying out hydrothermal pre-treatment, adding a surfactant into the mixture subjected to hydrothermal pre-treatment, carrying out ultrasonic stripping by an ultrasonic destrustor, carrying out centrifugation treatment, and collecting a supernatant liquor, wherein the supernatant liquor is the monolayer MoS2 nano-sheet solution. Compared with the prior art for preparing a monolayer MoS2 nano-sheet solution by a reaction of MoS2 and alkyl lithium and ultrasonic stripping, the preparation method provided by the invention has the advantages of the adopted organic solvent is not sensitive to the environment; a whole preparation period is short; and the obtained monolayer MoS2 nano-sheets have better dispersibility and stability and a lower cost.

Description

technical field [0001] The invention belongs to the field of nanomaterials, in particular to a single-layer MoS synthesized by hydrothermal reaction pretreatment and ultrasonic liquid phase exfoliation 2 Preparation method of nanosheet solution. Background technique [0002] transition metal sulfide MoS 2 It is a layered structure with strong chemical bonds in the layer and extremely weak van der Waals force between layers. By destroying the van der Waals force between layers, a single layer of MoS can be obtained 2 nanosheets, this two-dimensional structured MoS 2 Nanosheets have broad application prospects in the fields of nanoelectronics, friction, catalysis, energy and high-performance composite materials. Monolayer MoS is currently prepared 2 The methods of nanosheets include mechanical exfoliation and liquid phase exfoliation. The preparation amount of the mechanical exfoliation method is small, and it is difficult to meet the requirements of industrialization. C...

Claims

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Application Information

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IPC IPC(8): C01G39/06B82Y40/00
Inventor 阎鑫赵鹏艾涛
Owner CHANGAN UNIV
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