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Method for preparing molybdenum disulfide graphene aerogel by using low-temperature plasma and product thereof

A technology of graphene airgel and low-temperature plasma, which is applied to the preparation of molybdenum sulfide, graphene, and aerogel, and can solve the problems of operator poisoning, uneven distribution of molybdenum disulfide, composite airgel adsorption and hydrogen evolution performance To achieve the effect of simplifying the production and restoration process and lowering the price

Active Publication Date: 2020-06-12
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thiocyanide reducing agents are highly toxic substances, which not only easily cause poisoning of operators, but also require advanced disposal of synthetic residual liquid
At the same time, the distribution of molybdenum disulfide in the prepared graphene-based nano-molybdenum sulfide composite airgel is uneven, and the composite airgel has poor adsorption and hydrogen evolution performance.

Method used

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  • Method for preparing molybdenum disulfide graphene aerogel by using low-temperature plasma and product thereof
  • Method for preparing molybdenum disulfide graphene aerogel by using low-temperature plasma and product thereof
  • Method for preparing molybdenum disulfide graphene aerogel by using low-temperature plasma and product thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Example 1 The concentration of sulfuric acid added in the graphene slurry has an effect on the adsorption performance and hydrogen evolution performance of the prepared molybdenum disulfide graphene airgel

[0025] Mix water and graphite powder according to the liquid-solid ratio of 1: 1mL / mg, stir under the condition of 60rpm rotating speed, and carry out low-temperature plasma irradiation for 0.5 hour while stirring, and obtain graphene slurry, wherein the action voltage of low-temperature plasma irradiation is 20KV, the effect The atmosphere is oxygen. Drop sulfuric acid into the graphene slurry, so that the concentration of sulfuric acid in the slurry is 0.5M, 0.7M, 0.9M, 1M, 1.5M, 2M, 2.1M, 2.3M, 2.5M, to obtain nine groups of acidic graphene slurry. According to molybdenum trioxide and acidic graphene slurry mass ratio 5: 100, molybdenum trioxide is added in nine groups of acidic graphene slurry respectively, under 60rpm rotating speed condition, stir, carry out l...

Embodiment 2 3

[0033] Example 2 Effect of the mass ratio of molybdenum trioxide and acidic graphene slurry on the adsorption performance and hydrogen evolution performance of the prepared molybdenum disulfide graphene airgel

[0034] Mix water and graphite powder according to the liquid-solid ratio of 2: 1mL / mg, stir under the condition of 120rpm rotating speed, and carry out low-temperature plasma irradiation for 1 hour while stirring, and obtain graphene slurry, wherein the action voltage of low-temperature plasma irradiation is 35KV, the effect The atmosphere is oxygen. Drop sulfuric acid into the graphene slurry, so that the concentration of sulfuric acid in the slurry is 2M, to obtain acidic graphene slurry. According to molybdenum trioxide and acidic graphene slurry mass ratio 2.5: 100, 3.5: 100, 4.5: 100, 5: 100, 10: 100, 15: 100, 15.5: 100, 16.5: 100, 17.5: 100 molybdenum trioxide Add them into the acidic graphene slurry respectively, stir under the condition of 120rpm rotating spee...

Embodiment 3

[0041] Example 3 Effect of low-temperature plasma irradiation on the adsorption performance and hydrogen evolution performance of the prepared molybdenum disulfide graphene airgel

[0042] Mix water and graphite powder according to the liquid-solid ratio of 3: 1mL / mg, stir under the condition of 180rpm rotating speed, and carry out low-temperature plasma irradiation for 1.5 hours while stirring, and obtain graphene slurry, wherein the action voltage of low-temperature plasma irradiation is 50KV, the effect The atmosphere is oxygen. Drop sulfuric acid into the graphene slurry, so that the concentration of sulfuric acid in the slurry is 2M, to obtain acidic graphene slurry. Molybdenum trioxide is added to the acidic graphene slurry according to the mass ratio of molybdenum trioxide and acidic graphene slurry of 15:100, stirred under the condition of 180rpm rotating speed, and irradiated with low-temperature plasma for 1.5 hours while stirring, to obtain molybdenum disulfide grap...

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Abstract

The invention discloses a method for preparing molybdenum disulfide graphene aerogel by using low-temperature plasma. The method comprises the following steps: mixing water and graphite powder, stirring, and carrying out low-temperature plasma irradiation while stirring to obtain graphene slurry; dropwise adding sulfuric acid into the graphene slurry to obtain acidic graphene slurry; adding molybdenum trioxide into the acidic graphene slurry, performing low-temperature plasma irradiation while stirring, and obtaining molybdenum disulfide graphene slurry; and centrifuging the molybdenum disulfide graphene slurry, carrying out solid-liquid separation, and carrying out freeze drying on the solid part to obtain the molybdenum disulfide graphene aerogel. The invention further discloses the molybdenum disulfide graphene aerogel. Uniform dispersion and mixing of molybdenum disulfide and graphene are realized based on ultraviolet radiation and microwave radiation generated in a low-temperatureplasma system, and additional ultrasonic dispersion is not needed. The adsorption performance and the hydrogen evolution performance of the molybdenum disulfide graphene aerogel prepared by the method are higher than those of molybdenum disulfide graphene aerogel prepared by the traditional method.

Description

technical field [0001] The invention relates to the field of research and development of material preparation methods, in particular to a method for preparing molybdenum disulfide graphene airgel by using low-temperature plasma and its products. Background technique [0002] At present, molybdenum disulfide graphene airgel is mainly prepared by hydrothermal method, chemical vapor deposition method, solvothermal-heat treatment method, physical doping method and other methods. The chemical vapor deposition method is to form a composite coating nanomaterial by vaporizing the target material and sequentially depositing it on the substrate material. The preparation process is complicated and the target materials need to be pre-purchased, which is difficult to promote on a large scale in practical industrial applications. [0003] However, the preparation of molybdenum disulfide graphene airgel by hydrothermal method and solvothermal-thermal treatment method requires additional a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06C01B32/184B01J13/00
CPCC01G39/06C01B32/184B01J13/0091
Inventor 黄涛徐娇娇刘万辉金俊勋刘龙飞宋东平周璐璐张树文
Owner CHANGSHU INSTITUTE OF TECHNOLOGY