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Method for preparing mono-disperse molybdenum disulfide nano sheet

A molybdenum disulfide and nanosheet technology, which is applied in the fields of molybdenum sulfide, nanostructure manufacturing, nanotechnology, etc., can solve the problems of limiting catalytic performance, incapable of lateral basal plane segmentation and refinement, etc., achieving simple and easy process and improving lubrication. performance and catalytic performance, the effect of preventing particle growth

Inactive Publication Date: 2010-05-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tye et al. from the University of British Columbia (UBC) prepared a monolayer of molybdenum disulfide by exfoliation technology and studied its catalytic performance. The results showed that the monolayer structure can effectively improve the catalytic activity, but the exfoliation technology is only for longitudinal structural solution. Therefore, the preparation of nano-scale monodisperse sheet-like nanostructures has become a bottleneck that limits the further improvement of its catalytic performance.

Method used

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  • Method for preparing mono-disperse molybdenum disulfide nano sheet
  • Method for preparing mono-disperse molybdenum disulfide nano sheet
  • Method for preparing mono-disperse molybdenum disulfide nano sheet

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Mix 5g of molybdenum oxide and 10g of sulfur into a stainless steel ball milling tank, pass in argon as a protective gas, use stainless steel balls as a ball milling medium, the ball-to-material ratio is 60:1, and mill at 400rpm for 24h. Take 1g of the activated product from ball milling and put it into a porcelain boat, and take another porcelain boat and fill it with 2g of sulfur; the tube furnace is pre-filled with argon to exhaust the air, and heated to 600°C, then place the above two boats in the heating zone , where the porcelain boat filled with sulfur is placed at the upper stream of the gas as a supplementary sulfur source; after being kept at a constant temperature for 2 hours in an argon atmosphere, it is cooled to 200°C with the furnace, the porcelain boat is taken out, and the black powder is collected to obtain monodisperse molybdenum disulfide Nanosheets, particle size between 50-200nm.

Embodiment 2

[0021] Mix 5g of molybdenum oxide and 10g of sulfur into a stainless steel ball milling tank, pass in argon as a protective gas, use stainless steel balls as a ball milling medium, the ball to material ratio is 60:1, and mill at 400rmp for 24h. Take 1g of the activated product from ball milling and put it into a porcelain boat. The tube furnace is filled with argon gas to exhaust the air, and heated to 600°C. Then place the porcelain boat in the heating zone without supplementary sulfur source; under argon atmosphere After constant temperature for 2 hours, cool down to 200°C with the furnace, take out the porcelain boat, collect the black powder, and use XRD for detection. The results show that the product contains molybdenum disulfide and part of molybdenum oxide, indicating that the vulcanization is not complete, so the sulfur source must be supplemented in advance.

Embodiment 3

[0023] Mix 5g of molybdenum oxide and 10g of sulfur into a stainless steel ball milling tank, pass in argon as a protective gas, use stainless steel balls as a ball milling medium, the ball to material ratio is 60:1, and mill at 400rmp for 24h. Take 1g of the activated product from ball milling and put it into a porcelain boat, and take another porcelain boat and fill it with 2g of sulfur; the tube furnace is pre-filled with argon to exhaust the air, and heated to 400°C, then place the above two boats in the heating zone , where the porcelain boat filled with sulfur is placed at the upper stream of the gas as a supplementary sulfur source; after being kept at a constant temperature for 2 hours in an argon atmosphere, it is cooled to 200°C with the furnace, the porcelain boat is taken out, and the black powder is collected to obtain monodisperse molybdenum disulfide The nanosheet has the same morphology and structure as Example 1, but the crystallinity is relatively poor.

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Abstract

The invention provides a method for preparing a mono-disperse molybdenum disulfide nano sheet, which is characterized in that a mixture of molybdenum oxide and sulfur is used as a raw material, and the mixture is activated through ball milling in protective atmosphere; and then the mixture is annealed at the constant temperature of between 400 and 700 DEG C to be fully vulcanized so as to obtain mono-disperse molybdenum disulfide nano sheet granules. A large amount of mono-disperse molybdenum disulfide nano material is prepared through the simple and effective chemical synthesis method; and the method is simple and quick, has low production cost, and provides possibility for the broad application of the material in the aspects of lubrication and catalysis.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation and relates to a preparation method of monodisperse molybdenum disulfide nanosheets. technical background [0002] Molybdenum disulfide (MoS) nanoparticles 2 ) has broad application prospects in electronic probes, petroleum catalysis, hydrogen storage materials, friction lubrication, and solar cells due to its high specific surface area and good optical, electrical, lubricating, and catalytic properties. At present, the methods for preparing molybdenum disulfide nanomaterials mainly include high-temperature gas-solid reaction method, thermal decomposition method, hydrothermal method, electrochemical method, chemical vapor deposition method and so on. The morphology and structure of prepared molybdenum disulfide nanomaterials are also different, including nanotubes, nanowires, nanorods, nanoflowers, hollow nanospheres and inorganic fullerene structures, but there are few reports on two-dime...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06B82B3/00
Inventor 王德志吴壮志孙傲魁汪异
Owner CENT SOUTH UNIV
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