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Laser rapid preparation method of inorganic molybdenum disulfide microsphere with fullerene like structure

A technology of fullerene molybdenum disulfide and molybdenum disulfide, applied in the fields of molybdenum sulfide, petroleum industry, additives, etc., can solve the problems of cumbersome preparation process and harsh conditions, and achieve simple process, easy control of conditions and low preparation cost Effect

Active Publication Date: 2016-07-06
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the existing fullerene-like structure molybdenum disulfide preparation process, such as cumbersome and harsh conditions, the present invention proposes for the first time the use of pulsed laser irradiation to prepare fullerene-like structure molybdenum disulfide

Method used

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  • Laser rapid preparation method of inorganic molybdenum disulfide microsphere with fullerene like structure
  • Laser rapid preparation method of inorganic molybdenum disulfide microsphere with fullerene like structure
  • Laser rapid preparation method of inorganic molybdenum disulfide microsphere with fullerene like structure

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Experimental program
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Effect test

Embodiment 1

[0036] (1) Weigh 750mg of original molybdenum disulfide powder (purity 98%, particle size 800nm) into a 100mL beaker, add 50mL dimethylformamide, and ultrasonically disperse for 30min to form a suspension;

[0037] (2) Irradiate the suspension prepared in the above step (1) with the krypton-fluorine laser beam (248nm) focused by the mirror and convex lens, and ablate the molybdenum disulfide powder in the solvent. The laser energy density is 1800mJpulse -1 cm -1 , the frequency is 10Hz, the laser pulse is 5ns, and the irradiation time is 20min. During laser beam irradiation, the container containing the suspension was placed in an ice-water mixture to keep the temperature low, and the suspension was continuously stirred with a magnetic stirrer at a speed of 1500 r / min.

[0038] (3) After irradiation, centrifuge the suspension, and then dry the powder at 60°C to obtain the product.

[0039] figure 1 It is the scanning electron microscope picture of the original molybdenum disu...

Embodiment 2

[0041] (1) Weigh 250mg of original molybdenum disulfide powder (purity 98%, particle size 600nm) into a 100mL beaker, add 50mL dimethylformamide, and ultrasonically disperse for 20min to form a suspension.

[0042] (2) Irradiate the suspension prepared in the above step (1) with the krypton-fluorine laser beam (248nm) focused by the mirror and convex lens, and ablate the molybdenum disulfide powder in the solvent. The laser energy density is 1600mJpulse -1 cm -1 , the frequency is 8Hz, the laser pulse is 25ns, and the irradiation time is 30min. During the laser beam irradiation process, the container containing the suspension was placed in an ice-water mixture to keep the temperature low, and the suspension was continuously stirred with a magnetic stirrer at a speed of 1000 r / min.

[0043] (3) After the irradiation, the suspension was centrifuged, and the powder was dried at 60°C to obtain fullerene-like molybdenum disulfide microspheres. The appearance of the product obtain...

Embodiment 3

[0045] (1) Weigh 25mg of original molybdenum disulfide powder (purity 98%, particle size 400nm) into a 100mL beaker, add 50mL dimethylformamide, and ultrasonically disperse for 10min to form a suspension.

[0046] (2) Irradiate the suspension prepared in the above step (1) with the krypton-fluorine laser beam (248nm) focused by the mirror and the convex lens, and ablate the molybdenum disulfide powder in the solvent, and the laser energy density is 1000mJpulse -1 cm -1 , the frequency is 5Hz, the laser pulse is 50ns, and the irradiation time is 40min. During laser beam irradiation, the container containing the suspension was placed in a mixture of ice and water to keep the temperature low, and the suspension was continuously stirred with a magnetic stirrer at a speed of 800 r / min.

[0047] (3) After the irradiation, the suspension was centrifuged, and the powder was dried at 60°C to obtain fullerene-like molybdenum disulfide microspheres. The appearance of the product obtain...

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Abstract

The invention discloses a laser rapid preparation method of an inorganic molybdenum disulfide microsphere with a fullerene like structure. The preparation method comprises the following steps: dissolving molybdenum disulfide powder into an organic solvent to form suspension liquid; radiating the suspension liquid by pulse laser so as to convert the molybdenum disulfide powder into a fullerene like structure under the effect of the organic solvent and pulse laser; after radiation, subjecting the suspension liquid to centrifugation and separation, and drying the obtained precipitate so as to obtain the inorganic molybdenum disulfide microsphere with a fullerene like structure. Molybdenum disulfide suspension liquid is directly radiated by laser beams, so that molybdenum disulfide powder in suspension liquid can obtain great energy in a very short time (nano second level), molybdenum disulfide powder is ablated and rapidly cooled (nano second level) by the solvent; and molybdenum disulfide microsphere is prepared therefore. The method has the advantages of simple operation, low cost, high product purity, and no impurity. The obtained molybdenum disulfide microsphere can reduce the friction during the friction process.

Description

technical field [0001] The invention relates to a method for preparing molybdenum disulfide microspheres with a fullerene-like structure, in particular to a method for simply and quickly forming molybdenum disulfide microspheres with a fullerene-like structure by using pulsed laser irradiation, belonging to The technical field of preparation of micro-nano powder. Background technique [0002] Layered molybdenum disulfide (2H-MoS 2 ) has been widely used as an additive to traditional solid lubricants, lubricating oils, and greases, but due to the presence of dangling bonds at its ends, it has high chemical activity and is easily oxidized, which increases the friction coefficient and limits its use in wet and Use in oxygen-enriched environments. In 1993, Margulis first proposed the inorganic fullerene molybdenum disulfide (IF-MoS 2 ) preparation method (Nature,1993,365:113-114), compared to the sheet-like 2H-MoS 2 particles, IF-MoS 2 It has a spherical or cylindrical stru...

Claims

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Application Information

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IPC IPC(8): C01G39/06C10M125/22C10N30/06
CPCC01G39/06C01P2004/03C01P2004/04C01P2004/62C01P2006/80C10M125/22C10M2201/066C10N2030/06
Inventor 罗婷曹丙强杨树华王平
Owner UNIV OF JINAN
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