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Preparation method of MoS2 nanosheets adopting two-dimensional nanostructures

A two-dimensional nanostructure and nanosheet technology, applied in nanotechnology, molybdenum sulfide, etc., to achieve low cost, good crystallinity, and controllable layers

Active Publication Date: 2017-08-18
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods cannot meet the requirements of simple steps, controllable number of nanosheet layers and large-scale production at the same time.

Method used

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  • Preparation method of MoS2 nanosheets adopting two-dimensional nanostructures
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  • Preparation method of MoS2 nanosheets adopting two-dimensional nanostructures

Examples

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Effect test

example 1

[0042] 1. Preparation of MoS 2 Nanosheets:

[0043] Put 3.8 g of ammonium molybdate and 6.6 g of thiourea into 70 mL of distilled water, and stir them under magnetic force at 30 °C to dissolve them to obtain ammonium molybdate concentration of 0.05 g / mL, thiourea concentration of 0.09 g / mL and molybdenum atoms Add 2 mL of HNTs powder at 60 °C to the above mixing system with a molar ratio of 1:4 to the sulfur atom, continue to stir to make the solid-liquid mix evenly, and transfer it to a stainless steel autoclave lined with polytetrafluoroethylene , reacted at 180 °C, 5 rpm for 48 h.

[0044] After the reaction, the system was naturally cooled to room temperature, and the product was washed with 20% hydrofluoric acid aqueous solution and 20% hydrochloric acid aqueous solution to remove template HNTs, and then washed with deionized water and absolute ethanol for 3 ~5 times, centrifuge, filter, dry at 50 °C for 12 h, and collect the black product after grinding.

[0045] Such...

example 2

[0049] 1. Preparation of MoS 2 Nanosheets:

[0050] Put 3.8 g of ammonium molybdate and 4.7 g of thioacetamide into 70 mL of distilled water, and stir them under magnetic force at 40 °C to dissolve them to obtain a concentration of ammonium molybdate of 0.05 g / mL and a concentration of thioacetamide of 0.07 g / mL. mL of a solution with a molar ratio of molybdenum atoms and sulfur atoms of 1:3, add 2 mL of HNTs powder at 80 °C to the above mixing system, continue to stir to make the solid-liquid mix evenly, and transfer it to a polytetrafluoroethylene-lined stainless steel In a high-pressure reactor, the reaction was carried out at 220 °C and 10 rpm for 24 h.

[0051] After the reaction, the system was naturally cooled to room temperature, and the product was washed with 30% hydrofluoric acid aqueous solution and 30% hydrochloric acid aqueous solution respectively to remove the template, and then washed with deionized water and absolute ethanol for 3~ Five times, centrifuge, f...

example 3

[0056] 1. Preparation of MoS 2 Nanosheets:

[0057] Put 4.3 g of sodium molybdate and 3.3 g of sodium sulfide in 70 mL of distilled water, and stir them under magnetic force at 60 °C to dissolve them to obtain a concentration of sodium molybdate of 0.06 g / mL, a concentration of sodium sulfide of 0.05 g / mL and molybdenum atoms Add 2 mL of 100 °C HNTs powder to the above mixed system with a molar ratio of 1:2 to the sulfur atom, continue to stir to make the solid-liquid mix evenly, and transfer it to a stainless steel autoclave lined with polytetrafluoroethylene , reacted at 240 °C, 15 rpm for 12 h.

[0058] After the reaction, the system was naturally cooled to room temperature, and the product was washed with 40% hydrofluoric acid aqueous solution and 38% hydrochloric acid aqueous solution respectively to remove the template, and then washed with deionized water and absolute ethanol for 3~ Five times, centrifuge, filter, dry at 80 °C for 24 h, and collect the product after g...

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Abstract

The invention relates to a preparation method of MoS2 nanosheets adopting two-dimensional nanostructures and relates to the technical field of preparation of nanomaterials. According to the preparation method, a powdery halloysite nanotube is taken as a template, a mixed solution of a molybdenum source and a sulfur source is added, thus, the molybdenum source and the sulfur source are deposited on the outer surface and the interlayer of the template and can react quickly, and molybdenum disulfide crystal nucleuses are produced in the template and grow rapidly into curled sheets; the template is removed, and a curled molybdenum disulfide crude product is obtained; multilayer flaky MoS2 nanosheets adopting two-dimensional layered structures are formed by spreading curled molybdenum disulfide through own tension. The preparation method has the advantages that the preparation cost is low, the stability is good, the nanosheets are prepared with a template method, besides, the steps are simple, the number of layers of nanosheets can be controlled, and large-scale production is realized.

Description

technical field [0001] The invention relates to the technical field of preparation of nanometer materials, in particular to the technical field of lubricating materials. Background technique [0002] Transition metal chalcogenides, especially molybdenum disulfide, have a lamellar structure similar to graphite, the van der Waals force between layers is very weak, and the layers are easy to peel off, so their friction coefficient is very low, and slippage is very easy to occur; The covalent bond in the layer is very strong, indicating that it has good mechanical strength, good thermal stability in an inert environment, and has the characteristics of free dangling bonds on the surface, which can prevent the lubricant film from being penetrated on the protruding part of the metal surface. And the sulfur atoms exposed on the surface of the crystal will have a strong adhesion to the metal surface, forming a very strong film, making its lubricating performance superior to that of g...

Claims

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Application Information

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IPC IPC(8): C01G39/06B82Y40/00
CPCC01G39/06C01P2004/03C01P2004/04C01P2004/20
Inventor 程志林吴沛蓉刘赞
Owner YANGZHOU UNIV
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