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Rapid laser preparing method for composite with graphene loaded with spherical inorganic fullerene molybdenum disulfide

A technology of fullerene molybdenum disulfide and molybdenum disulfide, applied in graphene, molybdenum sulfide, petroleum industry, etc., can solve the problems of cumbersome preparation process and harsh conditions, achieve high product purity, fast reaction, and avoid harsh conditions Effect

Inactive Publication Date: 2017-02-15
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at existing IF-MoS 2 / The preparation process of graphene composite materials is cumbersome and the conditions are harsh. For the first time, it is proposed to use pulsed laser irradiation to prepare graphene-loaded spherical inorganic fullerene-like molybdenum disulfide composites.

Method used

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  • Rapid laser preparing method for composite with graphene loaded with spherical inorganic fullerene molybdenum disulfide
  • Rapid laser preparing method for composite with graphene loaded with spherical inorganic fullerene molybdenum disulfide
  • Rapid laser preparing method for composite with graphene loaded with spherical inorganic fullerene molybdenum disulfide

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Experimental program
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Effect test

Embodiment 1

[0032] (1) Weigh 0.24 g of sodium molybdate (purity 99%) and 0.15 g of thioacetamide (purity 98%) into a beaker, add 50 mL of deionized water, stir magnetically until the powder is completely dissolved; then transfer the solution into the reaction Kettle, kept at 180°C for 24 hours; after cooling, centrifuged and washed 7 times with deionized water to obtain flake molybdenum disulfide suspension evenly dispersed in aqueous solution;

[0033] (2) 2.0 mL of graphene oxide solution (0.8 mg mL -1 ) was added to the above molybdenum disulfide suspension, and the concentration after mixing the two was 0.8 mg mL -1 , ultrasonic dispersion for 5 min;

[0034] (3) Irradiate the mixed suspension prepared in the above step (2) with the krypton-fluorine laser beam (248 nm) focused by the mirror and the convex lens, and the laser energy density is 300 mJ pulse -1 cm -1 , the frequency is 15 Hz, and the irradiation time is 20 min. During laser beam irradiation, a magnetic stirrer was u...

Embodiment 2

[0038] (1) Weigh 0.24 g sodium molybdate (99% purity), 0.19 g thioacetamide (98% purity) and 0.15 g silicotungstic acid (98% purity) into a beaker, add 50 mL deionized water, Stir magnetically until the powder is completely dissolved; then transfer the solution into a reaction kettle and keep it warm at 220°C for 10 h; after cooling, wash it with deionized water for 7 times to obtain a flake molybdenum disulfide suspension evenly dispersed in the aqueous solution;

[0039] (2) 2 mL of graphene oxide solution (0.8 mg mL -1 ) was added to the above molybdenum disulfide suspension, and the concentration after mixing the two was 5 mg mL -1 , ultrasonic dispersion for 15 min;

[0040] (3) The mixed suspension prepared in the above step (2) is irradiated with the krypton-fluorine laser beam (248 nm) focused by the mirror and the convex lens, and the laser energy density is 500 mJ pulse -1 cm -1 , the frequency is 10 Hz, and the irradiation time is 40 min. During laser beam irra...

Embodiment 3

[0043] (1) Weigh 0.24 g sodium molybdate (purity 99%), 0.21 g thioacetamide (purity 98%) and 0.15 g polyethylene glycol (purity 98%) into a beaker, add 50 mL deionized water , magnetically stirred until the powder was completely dissolved; then the solution was transferred into a reaction kettle and kept at 200°C for 16 h; after cooling, it was centrifugally washed with deionized water for 5 times to obtain a flaky molybdenum disulfide suspension uniformly dispersed in an aqueous solution ;

[0044] (2) 3 mL of graphene oxide solution (0.8 mg mL -1 ) was added to the above molybdenum disulfide suspension, and the concentration after mixing the two was 15 mg mL -1 , ultrasonic dispersion for 30 min;

[0045] (3) Irradiate the mixed suspension prepared in the above step (2) with the krypton-fluorine laser beam (248 nm) focused by the mirror and the convex lens, and the laser energy density is 700 mJ pulse -1 cm -1 , the frequency was 5 Hz, and the irradiation time was 60 mi...

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Abstract

The invention discloses a preparing method for a composite with graphene loaded with spherical inorganic fullerene molybdenum disulfide. The preparing method includes the following steps that sheetlike molybdenum disulfide and an oxidized graphene solution are mixed, and the mixture is ultrasonically dispersed into a suspension; the mixed suspension is irradiated with pulse lasers and converted into an interlayer structure under the effect of the pulse lasers and a liquid-phase solution solvent, wherein the interlayer structure is formed by the reduced oxidized graphene and nanometer / submicron inorganic fullerene molybdenum disulfide small spheres loaded on the surface of the reduced oxidized graphene alternately; after irradiation, the suspension is centrifuged, the obtained sediment is dried, and the composite with the reduced oxidized graphene loaded with the spherical inorganic fullerene molybdenum disulfide is obtained. According to the preparing method, the mixed suspension is irradiated directly with a laser beam, suspended particles instantaneously (in the nanosecond order) obtain high energy and are ablated and rapidly (in the nanosecond order) cooled with a solution, and therefore reduction of the oxidized graphene and conversion of the structure of the sheetlike molybdenum disulfide into the spherical inorganic fullerene structure are achieved in a one-step mode; the method is easy to operate, low in cost and free of impurity pollution, and the obtained composite shows excellent friction reduction performance in the friction process.

Description

technical field [0001] The invention relates to a method for preparing graphene-supported spherical inorganic fullerene-like molybdenum disulfide, in particular to a simple and rapid method for realizing the reduction of graphene oxide and flake molybdenum disulfide to spherical inorganic molybdenum by using pulsed laser irradiation technology. The transformation of fullerene structure belongs to the technical field of preparation of micronano powder. Background technique [0002] The global energy loss caused by friction and wear accounts for about one-third of the total mechanical energy loss. Facing the rapid development of the world economy and the strong demand for energy conservation and emission reduction, the research on anti-wear and anti-friction materials will make outstanding contributions to the realization of energy conservation and emission reduction. Layered molybdenum disulfide (2H-MoS 2 ) has been widely used as an additive to traditional solid lubricants,...

Claims

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Application Information

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IPC IPC(8): C10M125/00C01G39/06C01B32/184B82Y30/00C10N30/06C10N10/12
CPCB82Y30/00C01G39/06C01P2002/01C01P2004/03C01P2004/04C01P2004/80C10M125/00C10M2201/041C10M2201/066C10N2030/06C10N2010/12
Inventor 罗婷曹丙强王平杨树华
Owner UNIV OF JINAN
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