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Method for obtaining molybdenum disulfide nanosheet through simple intercalation stripping

A molybdenum disulfide and nanosheet technology is applied in the field of simple intercalation and exfoliation to prepare molybdenum disulfide nanosheets, which can solve the problems of difficulty in large-scale production, harsh equipment requirements and high temperature, and achieves easy washing and removal, low cost and convenient operation. Effect

Active Publication Date: 2018-02-23
PINGDINGSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with other methods, this method has extremely strict requirements on equipment, and requires high temperature and high cost during the reaction, so it is not easy to produce on a large scale.

Method used

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  • Method for obtaining molybdenum disulfide nanosheet through simple intercalation stripping
  • Method for obtaining molybdenum disulfide nanosheet through simple intercalation stripping
  • Method for obtaining molybdenum disulfide nanosheet through simple intercalation stripping

Examples

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Effect test

Embodiment 1

[0030] In this example, the preparation of molybdenum disulfide nanosheets with a thickness of 50 to 300 nm by intercalation exfoliation is taken as an example to illustrate the specific implementation steps of the method for obtaining molybdenum disulfide nanosheets by simple intercalation exfoliation in the present invention:

[0031] Step 1: Use molybdenum disulfide (analytical pure) with a particle size of micron as the raw material. ) in deionized water and mixed thoroughly to obtain a dispersion system.

[0032] See figure 1 Shown is the scanning electron microscope image of the raw material molybdenum disulfide, which shows that the molybdenum disulfide before peeling has a micron-scale lamellar structure with a relatively large thickness and irregular morphology.

[0033] The second step: heat the dispersion system prepared in the first step to 180-200°C in a high-pressure reactor, and perform intercalation treatment for 3-6 hours. A certain high pressure is generate...

Embodiment 2

[0041] In this embodiment, the method for obtaining molybdenum disulfide nanosheets by simple intercalation and exfoliation uses high-purity molybdenum disulfide with a particle size of micron as a raw material to prepare molybdenum disulfide nanosheets. The steps are as follows:

[0042] 1) Using magnesium chloride and sodium sulfide as intercalation agents, mix molybdenum disulfide, magnesium chloride and sodium sulfide with deionized water in a mass ratio of 50-100:1:0.5-1:600, and stir to obtain a dispersion system; Units of mass are grams or kilograms.

[0043] 2) Heat the dispersion system prepared in step 1) in a high-pressure reactor to 180-200°C for intercalation treatment, and the duration of intercalation treatment is 3-6 hours;

[0044] 3) Cool the dispersion system obtained in step 2) to room temperature, and then use ultrasonic treatment for peeling, and the duration of ultrasonic peeling is 30-60 minutes;

[0045] 4) The dispersion system obtained in step 3) wa...

Embodiment 3

[0047] The method for obtaining molybdenum disulfide nanosheets described in this example is different from Example 2 in that in step 3), 50 mL of the dispersion obtained after step 2) is placed in a beaker, Add 100-150mL of deionized water, and then place the beaker in a KQ-500B ultrasonic cleaner (power 50W, frequency 50KHz) for 40-50min to obtain relatively uniform single-layer or few-layer molybdenum disulfide nanoparticles. tablet dispersion system.

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Abstract

The invention relates to a simple intercalation stripping method for a molybdenum disulfide nanosheet. According to the method for obtaining the molybdenum disulfide nanosheet through simple intercalation stripping, high-purity molybdenum disulfide with a micron-grade particle size is adopted as a raw material, and the method comprises the following steps: 1) using magnesium chloride and sodium sulfide as intercalation agents, mixing the molybdenum disulfide, the magnesium chloride, the sodium sulfide and deionized water according to a mass ratio of (50-100):1:(0.5-1):600, and performing stirring to obtain a disperse system; 2) and putting the disperse system prepared in the step 1) into a high-pressure reaction kettle for heating to 180-200 DEG C, performing intercalation treatment, wherein the intercalation treatment lasts for 3-6 hours; 3) cooling the disperse system obtained in the step 2) to a room temperature, and then performing stripping by ultrasonic treatment, wherein the ultrasonic stripping lasts for 30-60 minutes; and 4) performing centrifugal separation on the disperse system obtained in the step 3), and then performing washing with deionized water, and performing vacuum drying to obtain the molybdenum disulfide nanosheet powder.

Description

technical field [0001] The invention relates to a method for preparing molybdenum disulfide nanosheets by simple intercalation and exfoliation. Background technique [0002] Molybdenum disulfide is a black powder with a two-dimensional structure similar to graphite. It is divided into a single-layer hexagonal crystal system and a multi-layer "sandwich biscuit" structure. Natural molybdenum disulfide is generally a semiconductor compound with chemical properties. It is very stable, with strong covalent bond in the layer, and van der Waals force between the layers. Therefore, it is easy to peel off between layers, and compared with graphite, molybdenum disulfide has a lower friction coefficient, and has radiation resistance and high load-bearing capacity, which can greatly reduce the direct contact between metals, and has a good It is widely used as lubricating materials in industries such as automobile machinery. [0003] Molybdenum disulfide can absorb photons of visible l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06B82Y40/00
CPCB82Y40/00C01G39/06C01P2002/01C01P2002/72C01P2002/82C01P2004/03C01P2004/62C01P2004/64C01P2006/80
Inventor 田正山曹可生白素贞理记涛
Owner PINGDINGSHAN UNIVERSITY
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