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Metal phase molybdenum disulfide nano-structure and preparation method thereof

A technology of molybdenum disulfide and nanostructure, applied in the direction of molybdenum sulfide, nanotechnology, nanotechnology, etc., can solve the problems of unobtainable purity, rich defects, high synthesis cost, etc., and achieve the effect of increasing active sites and regulating morphology

Active Publication Date: 2018-09-21
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former has many steps and has certain risks, while the latter has high synthesis cost and cannot obtain pure metal phase molybdenum disulfide
[0006] It can be seen that no matter it is CVD growth method, lithium ion stripping method, etc., there are certain defects in the method of synthesizing metal phase molybdenum disulfide, which makes it impossible to obtain simple, safe and large quantities of pure phase rich defects and small size at one time. Molybdenum disulfide

Method used

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  • Metal phase molybdenum disulfide nano-structure and preparation method thereof
  • Metal phase molybdenum disulfide nano-structure and preparation method thereof
  • Metal phase molybdenum disulfide nano-structure and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0038] A method for preparing metallic phase molybdenum disulfide nanostructures includes the following steps:

[0039] 1. Dissolve 0.06g sodium molybdate and 0.12g thioacetamide in 40mL deionized water, stir vigorously for 40 minutes to form a homogeneous solution, wherein the molar concentration of sodium molybdate is 6.25mmol / L, add thioacetamide The amount is 6.4 times the concentration of sodium molybdate substance, which is 40 mmol / L.

[0040] 2. Transfer the solution to a stainless steel reactor, and react in an oven at 200°C for 24 hours. After the reaction stops, cool to room temperature naturally.

[0041] 3. Centrifuge the black precipitate in the reactor at 6500 rpm, wash it with deionized water three times, and finally disperse it into deionized water. A dispersion liquid of metallic phase molybdenum disulfide nanostructure is obtained.

[0042] Obtain the metallic phase molybdenum disulfide nanosheets with a smaller size, more edge states and an average size of 75nm, su...

Embodiment 2-3

[0043] Example 2-3: The influence of the concentration of thioacetamide added in step 2 on the growth size of the metallic phase molybdenum disulfide.

example 2

[0045] In this example, except for adding in step 2, the added thioacetamide is three times the amount of sodium molybdate, which is 18.75mmol / L, and the other steps are the same as in Example 1. The obtained metal phase disulfide The average size of the molybdenum nanosheets is 90 nm.

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Abstract

The invention provides a metal phase molybdenum disulfide nano-structure and a preparation method thereof. The method comprises the steps that 1, molybdate and molecules containing sulfur are dissolved into deionized water according to the ratio larger than the molar ratio of sulfur to molybdenum in molybdenum disulfide, and stirring is performed to form a homogeneous solution; 2, the homogeneoussolution is heated to the temperature of 180-200 DEG C for heat preservation for 6-30 h, and after the reaction is stopped, natural cooling is performed to reach the room temperature; 3, sediments obtained after the reaction are centrifuged and separated, after repeated washing, a supernate is removed, and the metal phase molybdenum disulfide nano-structure is obtained. Hydro-thermal synthesis ofthe metal phase molybdenum disulfide nano-structure of the small size is achieved, and the surface of the synthesized metal phase molybdenum disulfide has multiple edge states, defects and other active sites.

Description

Technical field [0001] The invention belongs to the technical field of preparation of molybdenum disulfide, and relates to a method for preparing a metal phase molybdenum disulfide nanostructure based on a hydrothermal method, in particular to a metal phase molybdenum disulfide nanostructure and a preparation method thereof. Background technique [0002] The layered two-dimensional structure of molybdenum disulfide has better chemical stability, and it has unique photoelectrochemical properties and other advantages. Due to its cheap and easy-to-obtain advantages, it is considered as a catalyst material that has the opportunity to replace precious metal-based materials in the field of electrocatalysis. Its unique layered structure allows it to be used in lithium-ion batteries and supercapacitors. Therefore, molybdenum disulfide has received extensive attention in the fields of catalysis and energy storage. [0003] So far, molybdenum disulfide has been found to have three phase st...

Claims

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Application Information

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IPC IPC(8): C01G39/06B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G39/06C01P2002/82C01P2004/04C01P2004/32C01P2004/62C01P2004/64
Inventor 江瑞斌王晶
Owner SHAANXI NORMAL UNIV
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