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High-concentration high-dispersity ultrathin molybdenum disulfide dispersion liquid and preparation method thereof

A molybdenum disulfide, high dispersibility technology, applied in the direction of molybdenum sulfide, etc., can solve the problems of molybdenum disulfide nanosheet structure defects, low concentration of molybdenum disulfide dispersion liquid, etc., achieve complete peeling, low production cost, and improve dispersibility Effect

Pending Publication Date: 2021-04-02
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can prepare molybdenum disulfide stably dispersed in water, long-term ultrasonic and energy consumption may cause structural defects of molybdenum disulfide nanosheets, and the prepared molybdenum disulfide dispersion concentration is low (50mg / L)

Method used

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  • High-concentration high-dispersity ultrathin molybdenum disulfide dispersion liquid and preparation method thereof
  • High-concentration high-dispersity ultrathin molybdenum disulfide dispersion liquid and preparation method thereof
  • High-concentration high-dispersity ultrathin molybdenum disulfide dispersion liquid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Weigh 50mg of ionic liquid crystal-1-hexadecyl-3-methylimidazole bromide and add it to 20mL of deionized water, and vigorously stir until fully dissolved in water to obtain an aqueous solution of ionic liquid crystal for stripping molybdenum disulfide (concentration 2.5mg / mL);

[0029] (2) Take by weighing 0.05g molybdenum disulfide powder and add it to the ionic liquid crystal solution, stir until it is uniformly dispersed to obtain a mixed solution of molybdenum disulfide and ionic liquid crystal;

[0030] (3) Ultrasonic treatment of molybdenum disulfide and ionic liquid crystal mixed solution for 20min, the ultrasonic power is 100W, and the frequency is 40KHz;

[0031] (4) The ultrasonically treated molybdenum disulfide dispersion is subjected to centrifugal separation through a centrifuge, the centrifugal speed is 2000rpm, and the centrifugation time is 30min;

[0032] (5) After centrifugation, two-thirds of the supernatant liquid was taken to obtain a highly d...

Embodiment 2

[0034] (1) Weigh 100 mg of ionic liquid crystal-1-hexadecyl-3-methylimidazolium tetrafluoroborate and add it to 20 mL of deionized water, stir vigorously until fully dissolved in water to obtain ionic liquid crystal for stripping molybdenum disulfide Aqueous solution (concentration is 5mg / mL);

[0035] (2) Take 0.5g molybdenum disulfide powder and add it to the ionic liquid crystal solution, and stir until it is uniformly dispersed to obtain a mixed solution of molybdenum disulfide and ionic liquid crystal;

[0036] (3) ultrasonically treat the molybdenum disulfide and ionic liquid crystal mixed solution for 30min, the ultrasonic power is 200W, and the frequency is 40KHz;

[0037] (4) The ultrasonically treated molybdenum disulfide dispersion is subjected to centrifugal separation through a centrifuge, the centrifugal speed is 2000rpm, and the centrifugation time is 30min;

[0038] (5) After centrifugation, two-thirds of the supernatant liquid was taken to obtain a highly dis...

Embodiment 3

[0040] (1) Weigh 200 mg of ionic liquid crystal-1-hexadecyl-3-methylimidazolium hexafluorophosphate and add it to 20 mL of deionized water, and stir vigorously until fully dissolved in water to obtain an aqueous solution of ionic liquid crystal for stripping molybdenum disulfide (Concentration is 10mg / mL);

[0041] (2) Take 1g of molybdenum disulfide powder and add it to the ionic liquid crystal solution, stir until it is uniformly dispersed to obtain a mixed solution of molybdenum disulfide and ionic liquid crystal;

[0042] (3) ultrasonically treat the molybdenum disulfide and ionic liquid crystal mixed solution for 40min, the ultrasonic power is 300W, and the frequency is 40KHz;

[0043] (4) The ultrasonically treated molybdenum disulfide dispersion is subjected to centrifugal separation through a centrifuge, the centrifugal speed is 3000rpm, and the centrifugation time is 20min;

[0044] (5) After centrifugation, two-thirds of the supernatant was taken to obtain a highly ...

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Abstract

The invention discloses a high-concentration high-dispersity ultrathin molybdenum disulfide dispersion liquid and a preparation method thereof. Molybdenum disulfide is used as a raw material, ionic liquid crystal is used as an auxiliary agent, the raw material and the auxiliary agent are dispersed in deionized water according to a specific proportion, and a water-based high-concentration high-dispersity ultrathin molybdenum disulfide dispersion liquid is prepared by adopting an ultrasonic mode. The prepared molybdenum disulfide dispersion liquid can be stably stored for a long time at normal temperature, the preparation process is simple and efficient, the production period is short, and the method is suitable for large-scale production; and the molybdenum disulfide prepared by adopting water as a solvent has no residual organic matters on the surface, is low in production cost, environment-friendly and high in safety coefficient, does not destroy the crystal structure of molybdenum disulfide, and has a very high application value.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a high-concentration and high-dispersibility ultra-thin molybdenum disulfide dispersion liquid and a preparation method thereof. Background technique [0002] Molybdenum disulfide (MoS 2 ) as a graphene-like layered transition metal sulfide has attracted extensive attention in recent years. Molybdenum disulfide belongs to the layered crystal structure of the hexagonal system. Each crystal is composed of multiple molybdenum disulfide molecular layers. A single layer of molybdenum disulfide is a S-Mo formed by two atomic layers of sulfur and one atomic layer of molybdenum. -Sandwich-like sandwich structure in S form. Adjacent two molecular layers are connected by weaker van der Waals force, the distance between the molecular layers is 0.65nm, and the molecular layers are connected by stronger chemical bonds, so a single layer or less is prepared by overcoming the van der Waals forc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06
CPCC01G39/06C01P2004/04
Inventor 宋浩杰田瑞杨进王思哲李永贾晓华
Owner SHAANXI UNIV OF SCI & TECH
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