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A kind of preparation method of molybdenum sulfide/graphene-graphene nanoribbon airgel composite material

A graphene nanoribbon, composite material technology, applied in the direction of molybdenum sulfide, nanotechnology, nanotechnology, etc., can solve the problems of inhibiting catalytic properties and energy storage properties, and the electrochemical active sites cannot be fully exposed, so as to shorten the transfer time. Route, ease of mass production, good synergistic effect

Inactive Publication Date: 2018-02-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to its abundant sources and high activity, molybdenum sulfide has been widely used in catalytic hydrogen evolution, lithium-ion batteries and other fields. However, pure molybdenum sulfide is extremely easy to form agglomerates, which makes the electrochemical active sites unable to be fully exposed and seriously inhibits Its catalytic properties and energy storage performance

Method used

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  • A kind of preparation method of molybdenum sulfide/graphene-graphene nanoribbon airgel composite material
  • A kind of preparation method of molybdenum sulfide/graphene-graphene nanoribbon airgel composite material
  • A kind of preparation method of molybdenum sulfide/graphene-graphene nanoribbon airgel composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Disperse 200 mg of graphene oxide in 100 ml of deionized water, and obtain a stable graphene oxide dispersion with a concentration of 2 mg / ml by ultrasound;

[0039] (2) Drop 3ml of graphene oxide nanoribbon aqueous dispersion with a concentration of 2mg / ml into 3ml of the graphene oxide solution in step (1), and stir for 3min to form a homogeneous mixture;

[0040] (3) Freeze the obtained mixed solution into a solid in liquid nitrogen, and then freeze-dry it in a freeze dryer for 48 hours to obtain a precursor of the graphene-graphene nanoribbon gel;

[0041] (4) Add 44 mg of ammonium thiomolybdate to 10 ml of N,N-dimethylformamide solvent, and ultrasonicate for 5 minutes to obtain a uniform red-brown solution;

[0042] (5) Take 10 mg of the obtained graphene-graphene nanoribbon gel precursor and put it into the N,N-dimethylformamide solution of ammonium thiomolybdate in step (4), and let it stand for 8 hours. The molybdenum sulfide / graphene-graphene nanobelt aerogel compo...

Embodiment 2

[0044] (1) Disperse 200 mg of graphene oxide in 100 ml of deionized water, and obtain a stable graphene oxide dispersion with a concentration of 2 mg / ml by ultrasound;

[0045] (2) Drop 4ml of graphene oxide nanoribbons aqueous dispersion with a concentration of 2mg / ml into 2ml of the graphene oxide solution in step (1) and stir for 3min to form a homogeneous mixture;

[0046] (3) Freeze the obtained mixed solution into a solid in liquid nitrogen, and then freeze-dry it in a freeze dryer for 48 hours to obtain a precursor of the graphene-graphene nanoribbon gel;

[0047] (4) Add 44 mg of ammonium thiomolybdate to 10 ml of N,N-dimethylformamide solvent, and ultrasonicate for 5 minutes to obtain a uniform red-brown solution;

[0048] (5) Take 10 mg of the obtained graphene-graphene nanoribbon gel precursor and put it into the N,N-dimethylformamide solution of ammonium thiomolybdate in step (4), and let it stand for 8 hours. By solvothermal reaction (reaction at 200°C for 8 hours), molyb...

Embodiment 3

[0054] (1) Disperse 200 mg of graphene oxide in 100 ml of deionized water, and obtain a stable graphene oxide dispersion with a concentration of 2 mg / ml by ultrasound;

[0055] (2) Drop 3ml of graphene oxide nanoribbons aqueous dispersion with a concentration of 2mg / ml into 3ml of the graphene oxide solution in step (1), and stir for 3min to form a homogeneous mixture;

[0056] (3) Freeze the obtained mixed solution into a solid in liquid nitrogen, and then freeze-dry it in a freeze dryer for 48 hours to obtain a precursor of the graphene-graphene nanoribbon gel;

[0057] (4) Add 22 mg of ammonium thiomolybdate to 10 ml of N,N-dimethylformamide solvent, and ultrasonicate for 5 minutes to obtain a uniform red-brown solution;

[0058] (5) Take 10 mg of the obtained graphene-graphene nanoribbon gel precursor and put it into the N,N-dimethylformamide solution of ammonium thiomolybdate in step (4), and let it stand for 8 hours. By solvothermal reaction (reaction at 200°C for 8 hours), moly...

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Abstract

The present invention relates to a molybdenum sulfide / graphene-graphene nano-belts aerogel composite material preparation method, which comprises: dispersing oxidized graphene in deionized water, and carrying out an ultrasonic treatment to obtain an oxidized graphene dispersing liquid; adding an oxidized graphene nano-belt dispersing liquid into the oxidized graphene dispersing liquid in a dropwise manner, stirring to obtain a mixed liquid, freezing with liquid nitrogen to obtain a solid, and carrying out freeze-drying to obtain the precursor of a graphene-graphene nano-belt gel; adding ammonium thiomolybdate to a solvent, and carrying out an ultrasonic treatment to obtain an ammonium thiomolybdate solution; and adding the precursor of the graphene-graphene nano-belt gel to the solution, standing, and carrying out a solvothermal reaction to obtain the molybdenum sulfide / graphene-graphene nano-belts aerogel composite material. According to the present invention, the method has characteristics of simple operation, easy control, low cost, no pollution, and easy large-scale production; and the prepared porous carbon nanometer aerogel has advantages of large specific surface area, stable chemical property, good conductivity, adjustable pore size, and the like.

Description

Technical field [0001] The invention belongs to the field of transition metal chalcogenides-carbon nanomaterials, and particularly relates to a method for preparing a molybdenum sulfide / graphene-graphene nanobelt aerogel composite material. Background technique [0002] Carbon aerogel is a typical three-dimensional network structure, with low density, high porosity, large specific surface area, adjustable pore structure, good stability, and high conductivity. It is widely used as adsorption material, catalyst carrier and various electrodes The substrate of active materials is one of the most promising new materials in the future. According to the source of the matrix, carbon aerogels can generally be divided into organic-based carbon aerogels, graphene or carbon nanotube-based carbon aerogels, and biomass-based carbon aerogels. [0003] Graphene is a single layer of graphite composed of sp2 carbon atoms arranged in a hexagonal direction. It has high internal carrier mobility (2000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58
CPCB82Y30/00B82Y40/00C01G39/06C01P2002/72C01P2004/03C01P2006/12
Inventor 刘天西孙振樊玮左立增顾华昊张由芳
Owner DONGHUA UNIV
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