Molybdenum disulfide nanosheet preparation method and application

A technology of molybdenum disulfide and nanosheets, which is applied in the direction of molybdenum sulfide, chemical instruments and methods, and other chemical processes, can solve the problems of high cost and harsh reaction conditions, and achieve the effects of low cost, high reactivity, and low price

Inactive Publication Date: 2018-08-24
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If you want to obtain single-layer and / or few-layer rhenium disulfide nanosheets with high specific surface area, strong adsorption capacity, and high reactivity, it is also necessary to make the layer-to-layer gap between layers of rhenium disulfide by chemical vapor deposition or chemical liquid phase exfoliation. stripping, the reaction conditions are harsh and the cost is high

Method used

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  • Molybdenum disulfide nanosheet preparation method and application
  • Molybdenum disulfide nanosheet preparation method and application
  • Molybdenum disulfide nanosheet preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0053] 0.5000g sodium molybdate (Na 2 MoO 4 2H 2 O), 1.4000g ethyl sodium xanthate sodium (C 3 h 5 OS 2 Na) and 0.4700g citric acid (C 6 h 8 o 7 ) were dissolved in 20mL of deionized water, and magnetically stirred for 15min. After complete dissolution, the pH of the citric acid solution was adjusted to 7.00 with concentrated ammonia water. Then mix all three together. The mixture was transferred to a 100mL autoclave, sealed, placed in an oven at 200°C for 10h, and cooled to room temperature naturally. After centrifugation, the reaction product is washed with deionized water and absolute ethanol several times, collected and vacuum freeze-dried to obtain a black powder product, which is a single-layer and / or few-layer molybdenum disulfide nanomaterial. Among them, sodium molybdate is almost quantitatively converted to molybdenum disulfide.

[0054] Figure 6 The atomic force microscope (AFM) picture of the molybdenum disulfide product prepared for this embodiment sh...

Embodiment 2

[0056] 0.5000g ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) and 1.2000g sodium isobutyl xanthate (C 5 h 9 OS 2 Na) were dissolved in 30 mL of deionized water, and magnetically stirred for 15 min. After being completely dissolved, the (NH 4 ) 6 Mo 7 o 24 4H 2 The pH of the O solution was adjusted to 7.00, after which the C 5 h 9 OS 2 Na solution was added to it and mixed evenly. The mixture was transferred to a 100mL autoclave, sealed, placed in an oven at 200°C for 8 hours, and cooled to room temperature naturally. After the reaction product is separated by centrifugation, it is washed with deionized water and absolute ethanol several times, collected and vacuum freeze-dried to obtain a black powder product, which is the nano molybdenum disulfide material. Among them, ammonium molybdate is almost quantitatively converted to molybdenum disulfide.

[0057] figure 1 The XRD spectrum of the nano molybdenum disulfide prepared for this example, its diffraction p...

Embodiment 3

[0059] 0.5000gNa 2 MoO 4 2H 2 O, 1.8000g sodium isobutyl xanthate (C 5 h 9 OS 2 Na) and 0.4700g citric acid (C 6 h 8 o 7 ) were dissolved in 20mL of deionized water, and magnetically stirred for 15min. After being completely dissolved, the C 6 h 8 o 7 The pH of the solution was adjusted to 9.00. Then mix all three together. The mixture was transferred to a 100mL autoclave, sealed, placed in an oven at 200°C for 12h, and cooled naturally to room temperature. After the reaction product is separated by centrifugation, it is washed with deionized water and absolute ethanol several times, collected and vacuum freeze-dried to obtain a black powder product, which is the nano molybdenum disulfide material. Among them, sodium molybdate is almost quantitatively converted to molybdenum disulfide.

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Abstract

The invention discloses a molybdenum disulfide nanosheet preparation method which comprises the steps: mixing a molybdenum source with xanthic acid and performing hydrothermal reaction to prepare single-layer and / or few-layer molybdenum disulfide nanosheet. According to the method, xanthate which is industrially produced in a large scale is utilized as a sulfur source, so that cost is low, repeatability is good, and the single-layer and / or few-layer molybdenum disulfide nanosheet can be prepared out. The nanosheet can be applied to the fields of adsorption, photocatalysis, photodegradation, lubrication, photoelectric devices and the like.

Description

technical field [0001] The invention relates to a preparation method and application of molybdenum disulfide nanosheets. Background technique [0002] Molybdenum disulfide (MoS 2 ) belongs to the hexagonal crystal system, which is a layered compound like graphene, and the layers are combined by weak van der Waals force. Single-layer or few-layer molybdenum disulfide has the characteristics of large specific surface area, strong adsorption capacity, and high reactivity, making it widely used in adsorption, photocatalysis, lithium batteries, lubrication and other fields. The current methods for preparing molybdenum disulfide micro-nano materials include micromechanical exfoliation, liquid phase ultrasonic exfoliation, lithium ion intercalation, laser method and annealing layer-by-layer thinning method, chemical vapor deposition method and hydrothermal method. Among them, the hydrothermal synthesis method is a more commonly used preparation method, which is to dissolve the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06B01J20/02B01J20/30
CPCB01J20/0218B01J20/0285C01G39/06C01P2004/20C01P2004/60C01P2004/62C01P2004/64
Inventor 刘广义张占飞孙辉李江伟
Owner CENT SOUTH UNIV
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