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Method for preparing molybdenum disulfide nano-layered dispersion with high stability

A technology of molybdenum disulfide and nano-sheets, which can be applied in household utensils, inks, applications, etc., can solve the problems of poor stability of molybdenum disulfide two-dimensional nanomaterials, and achieve low cost, simple preparation process, and good stability Effect

Inactive Publication Date: 2014-07-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a method for preparing a highly stable molybdenum disulfide nanosheet dispersion, and solve the technical problem of poor stability of molybdenum disulfide two-dimensional nanomaterials in the dispersion , to obtain surface-modified molybdenum disulfide nanosheets with a regular and stable planar structure, which can be stored stably for a long time at room temperature (more than three months), and the amount of surfactant modification on the surface of molybdenum disulfide nanosheets is controllable , the crystal structure and electrical properties of the surfactant-modified MoS2 were not affected

Method used

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  • Method for preparing molybdenum disulfide nano-layered dispersion with high stability
  • Method for preparing molybdenum disulfide nano-layered dispersion with high stability
  • Method for preparing molybdenum disulfide nano-layered dispersion with high stability

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Embodiment 1

[0059] The molybdenum disulfide nanosheet dispersion prepared by the lithium ion intercalation method prepares the molybdenum disulfide nanosheet dispersion with high stability, and the preparation steps include:

[0060] 1) Add 0.3 g molybdenum disulfide crystals to 3 mL of 1.6 M n-butyllithium n-hexane solution in a nitrogen glove box, and stir to fully react at room temperature;

[0061] 2) filtering through a Buchner funnel, and then fully washing with n-hexane to obtain molybdenum disulfide powder intercalated with lithium ions;

[0062] 3) Disperse the lithium ion intercalated molybdenum disulfide powder prepared in step 2) in water to form a 10 mg / mL suspension, ultrasonically disperse for 2 hours, and fully dialyze the obtained solution with a dialysis bag with a molecular weight cut-off of 10,000;

[0063] 4) The unstripped molybdenum disulfide crystals are removed by centrifugation at 2000rpm, and then diluted with the solution to obtain a molybdenum disulfide nanosh...

Embodiment 2

[0067] The molybdenum disulfide nanosheet dispersion prepared by the lithium ion intercalation method prepares the molybdenum disulfide nanosheet dispersion with high stability, and the preparation steps include:

[0068] 1) Add 0.3 g molybdenum disulfide crystals to 3 mL of 1.6 M n-butyllithium n-hexane solution in a nitrogen glove box, and stir to fully react at room temperature;

[0069] 2) filtering through a Buchner funnel, and then fully washing with n-hexane to obtain molybdenum disulfide powder intercalated with lithium ions;

[0070] 3) Disperse the lithium ion intercalated molybdenum disulfide powder prepared in step 2) in water to form a 10 mg / mL suspension, ultrasonically disperse for 2 hours, and fully dialyze the obtained solution with a dialysis bag with a molecular weight cut-off of 10,000;

[0071] 4) The unstripped molybdenum disulfide crystals were removed by centrifugation at 2500 rpm, and then diluted with the solution to obtain a molybdenum disulfide nano...

Embodiment 3

[0075] The molybdenum disulfide nanosheet dispersion prepared by the lithium ion intercalation method prepares the molybdenum disulfide nanosheet dispersion with high stability, and the preparation steps include:

[0076] 1) Add 0.3 g molybdenum disulfide crystals to 3 mL of 1.6 M n-butyllithium n-hexane solution in a nitrogen glove box, and stir to fully react at room temperature;

[0077] 2) filtering through a Buchner funnel, and then fully washing with n-hexane to obtain molybdenum disulfide powder intercalated with lithium ions;

[0078] 3) Disperse the lithium ion intercalated molybdenum disulfide powder prepared in step 2) in water to form a 10 mg / mL suspension, ultrasonically disperse for 2 hours, and fully dialyze the obtained solution with a dialysis bag with a molecular weight cut-off of 10,000;

[0079] 4) The unstripped molybdenum disulfide crystals were removed by centrifugation at 3000 rpm, and then diluted with the solution to obtain a molybdenum disulfide nano...

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Abstract

The invention discloses a method for preparing a molybdenum disulfide nano-layered dispersion with high stability. The method comprises the following steps: preparing a surfactant water solution, and preparing the molybdenum disulfide nano-layered dispersion by a chemical solution stripping method; mixing the two solutions according to the mass ratio of solute; firstly, carrying out ultrasonic dispersion on the obtained mixed solution, and then carrying out ultrasonic dispersion after centrifuging at a high speed, so as to obtain the molybdenum disulfide nano-layered dispersion with high stability. The technical problem that a molybdenum disulfide two-dimensional nano material in the dispersion is poor in stability is solved, and the method is simple in craft process, low in cost and applicable to large-scale production, can be applied to various optoelectronic devices, and has high application value.

Description

technical field [0001] The invention relates to a preparation method of a new material belonging to two-dimensional molybdenum sulfide, in particular to a preparation method of a highly stable molybdenum disulfide nanosheet dispersion. Background technique [0002] Molybdenum disulfide is a mineral purified from molybdenite, which has a flake structure similar to graphite. The stable molybdenum disulfide crystal form belongs to the layered structure of the hexagonal system, with a layer of molybdenum atoms sandwiched between two layers of sulfur atoms. The atomic layers are adjacent to each other, and are combined by weak van der Waals force. Due to this layered structure, it is widely used in solid lubricants, petroleum hydrodesulfurization catalysts, hydrogen storage materials, and non-aqueous lithium batteries. [0003] Since the layers are combined by weakly interacting van der Waals forces, molybdenum disulfide is also easily exfoliated into two-dimensional single-laye...

Claims

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Application Information

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IPC IPC(8): C09D11/52
Inventor 陈红征刘文清杨曦徐明生张莹莹
Owner ZHEJIANG UNIV
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