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Preparation method for inducing growth of molybdenum disulfide by means of graphene template

A technology of nano-molybdenum disulfide and graphene, which is applied in the field of nano-materials, can solve the problems of difficult operation, difficulty in obtaining molybdenum disulfide nanosheets, complex matrix removal, etc., and achieves reduced preparation costs, good controllable growth, and low cost. Effect

Active Publication Date: 2016-09-28
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The lithium ion intercalation stripping method uses n-butyllithium to intercalate micron-scale molybdenum disulfide in an organic solution, then strips the layer in water, and uses the hydrogen generated by the reaction to peel off the layer. The n-butyllithium used in this method belongs to It is a flammable substance, and it is not easy to operate, and the monolayer molybdenum disulfide generated quickly redeposits, and it is difficult to obtain large-area molybdenum disulfide nanosheets; although there are also single-layer or few-layer growth on different substrates by chemical vapor deposition. Molybdenum disulfide thin films have been reported (Li C, Liu Y, Su L, et al. Scientific Reports, 2013, 3:1866[J]), but there are problems such as the removal of the matrix is ​​still relatively complicated

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  • Preparation method for inducing growth of molybdenum disulfide by means of graphene template

Examples

Experimental program
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Effect test

Embodiment 1

[0025] (1) Add 0.0001 parts of graphene, 0.15 parts of citric acid, 2 parts of sodium molybdate, and 0.3 parts of sodium sulfide to the reaction solvent in sequence, adjust the pH to 3.5, and stir the reaction for 40 minutes at a temperature of 60°C;

[0026] (2) Ultrasound the reaction system obtained in step (1) for 20min, adjust the pH to 6, heat up to 95°C, and stir for 1h; centrifuge the solution at 11000rpm for 16min to obtain a black precipitate, wash it with deionized water 3 times, and Vacuum drying at 55°C for 10 hours to obtain the precursor;

[0027] (3) Place the precursor obtained in step (2) in a quartz tube and calcinate at a high temperature of 860°C for 2.2 hours in a hydrogen environment to obtain single-layer and few-layer molybdenum disulfide nanosheets, mainly few-layer molybdenum disulfide nanosheets.

Embodiment 2

[0029] (1) Add 0.0002 parts of graphene, 0.2 parts of citric acid, 10 parts of sodium molybdate, and 3 parts of sodium sulfide to the reaction solvent in sequence, adjust the pH to 3, and stir for 30 minutes at a temperature of 70°C;

[0030] (2) Ultrasound the reaction system obtained in step (1) for 20min, adjust the pH to 6.5, heat up to 98°C, and stir for 1h; centrifuge the solution at 12000rpm for 18min to obtain a black precipitate, rinse it with deionized water 4 times, and Vacuum drying at 52°C for 10 hours to obtain the precursor;

[0031] (3) Place the precursor obtained in step (2) in a quartz tube and calcinate at 880°C for 2 hours under a nitrogen atmosphere to obtain single-layer and few-layer molybdenum disulfide nanosheets, mainly few-layer molybdenum disulfide nanosheets.

Embodiment 3

[0033] (1) Add 0.0003 parts of graphene, 0.3 parts of citric acid, 15 parts of sodium molybdate, and 4 parts of sodium sulfide to the reaction solvent in sequence, adjust the pH to 4.5, and stir for 30 minutes at a temperature of 80°C;

[0034] (2) Ultrasound the reaction system obtained in step (1) for 30 minutes, adjust the pH to 6.8, heat up to 99 ° C, and stir for 1.2 hours; centrifuge the solution at 14000 rpm for 10 minutes to obtain a black precipitate, rinse it with deionized water for 5 times, Vacuum drying at 60°C for 10 hours to obtain the precursor;

[0035] (3) Place the precursor obtained in step (2) in a quartz tube and calcinate at 900°C for 3 hours under an argon atmosphere to obtain single-layer and few-layer molybdenum disulfide nanosheets, mainly single-layer molybdenum disulfide nanosheets.

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Abstract

The invention discloses a preparation method for inducing the growth of molybdenum disulfide by means of a graphene template. The method is characterized by comprising the steps of firstly, adding graphene and reaction raw materials into a reactor, carrying out a reaction for a period of time and then carrying out ultrasonic treatment; after that, heating up, continuously carrying out the reaction for a period of time, and then centrifuging the product; taking out the obtained precipitate, washing, putting the washed precipitate into a quartz tube, and carrying out calcination at the high temperature of 800-900 DEG C in the environment of hydrogen or inert gas. The method provided by the invention is efficient and mild in operation technology, and can be used for obtaining single-layer or fewer-layer molybdenum disulfide nanosheets, thus having wide application prospect in the fields such as catalysis, tribology and photoelectric devices.

Description

technical field [0001] The invention relates to the field of nanometer materials, in particular to a preparation method for inducing the growth of nano molybdenum disulfide by a graphene template. Background technique [0002] Molybdenum disulfide is a typical hexagonal layered material, which has a very wide range of applications in the fields of chemical catalysis, tribology, and optoelectronic devices. In recent years, with the continuous development of nanotechnology, many nano-molybdenum disulfides with different shapes have been developed, among which the most typical shapes of nano-molybdenum disulfide are nanospheres and nanosheets. Compared with molybdenum disulfide nanospheres, molybdenum disulfide nanosheets have a larger surface size, can form more catalytic centers and can be adsorbed on the friction interface, thus showing their unique advantages in catalysis and lubrication. [0003] At present, the preparation methods of molybdenum disulfide nanosheets mainl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06
CPCC01G39/06C01P2002/72C01P2004/04
Inventor 徐玉福耿健郑晓静胡献国
Owner HEFEI UNIV OF TECH