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Tungsten disulfide/graphene nanobelt composite material and preparation method thereof

A graphene nanoribbon, tungsten disulfide technology, applied in chemical instruments and methods, nanotechnology, nanotechnology and other directions, can solve the problems of poor conductivity, the excellent performance of pure tungsten disulfide cannot be fully utilized, etc. The effect of ingenious operation, experimental design, and simple preparation process

Inactive Publication Date: 2016-01-27
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure tungsten disulfide is easy to agglomerate, and it preferentially grows the inert inner layer structure instead of the active sheet edge, and a large number of agglomerates further inhibits the exposure of the active edge, coupled with its poor conductivity, pure The excellent properties of tungsten disulfide will not be fully utilized

Method used

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  • Tungsten disulfide/graphene nanobelt composite material and preparation method thereof
  • Tungsten disulfide/graphene nanobelt composite material and preparation method thereof
  • Tungsten disulfide/graphene nanobelt composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Embodiment 1, This embodiment includes the following steps:

[0044](1) Disperse 150 mg of multi-walled carbon nanotubes in 98% concentrated sulfuric acid, and then add 85% phosphoric acid after the dispersion is uniform, and keep stirring during this process to obtain a uniform dispersion;

[0045] (2) Add 750mg potassium permanganate to the above dispersion, add in batches, and keep stirring;

[0046] (3) Slowly raise the temperature of the reaction system to 70°C. After the temperature is stable, keep it warm for a period of time and keep stirring;

[0047] (4) Cool the resulting mixed dispersion to room temperature naturally, then pour it into ice water containing 7mL of 50% hydrogen peroxide, and let it settle overnight;

[0048] (5) Wash the obtained precipitate several times with 10% hydrochloric acid aqueous solution, and then wash it several times with a mixed solution of ethanol / ether;

[0049] (6) Centrifugal drying to obtain solid graphene oxide nanobelt...

Embodiment 2

[0054] Embodiment 2, Change the quality of ammonium thiotungstate in Example 1 to 22mg, and the rest are the same as in Example 1. The composite material finally obtained is denoted as GNRWS 2 -2.

Embodiment 3

[0055] Embodiment 3, Change the quality of ammonium thiotungstate in Example 1 to 44 mg, and the rest are the same as in Example 1. The composite material finally obtained is denoted as GNRWS 2 -3.

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Abstract

The invention belongs to the technical field of transition metal sulfide-carbon materials, and particularly discloses a tungsten disulfide / graphene nanobelt composite material and a preparation method thereof. A graphene nanobelt disclosed by the invention is prepared through solution oxidation, and the tungsten disulfide / graphene nanobelt composite material is formed by tungsten disulfide nanosheets in an in-situ growth manner on the graphene nanobelt through a one-step solvothermal method. The graphene nanobelt prepared by the invention has the advantages of stable chemical property, high conductivity and the like; and the composite material prepared by the invention has the characteristic of morphology controllability, and the tungsten disulfide nanosheets are uniformly loaded on the graphene nanobelt, so that the adhesion of tungsten disulfide is effectively inhibited, and unique high specific surface area and high conductivity of the graphene nanobelt are fully utilized. The tungsten disulfide / graphene nanobelt composite material prepared by the invention can become an ideal high-performance electrocatalytic material and an electrode material of new energy devices such as lithium ion batteries and solar cells.

Description

technical field [0001] The invention belongs to the technical field of transition metal sulfide-carbon materials, and specifically relates to a tungsten disulfide / graphene nanobelt composite material and a preparation method thereof. technical background [0002] Graphene nanoribbons are quasi-one-dimensional carbon-based nanomaterials, which have many excellent physical and chemical properties, such as high electrical conductivity, excellent mechanical properties, special edge effects, and good chemical stability. These special properties make it have extremely broad application prospects in the fields of energy conversion and storage, electronic sensors, polymer nanocomposites, etc., and become one of the research hotspots in the field of carbon nanomaterials. [0003] Tungsten disulfide is a typical transition metal chalcogenide. It belongs to the hexagonal crystal system. There are strong S-W-S covalent bonds in the layer and weak van der Waals force between the layers. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525H01L31/0224B01J27/047B82Y30/00B82Y40/00
CPCB01J27/047B82Y30/00B82Y40/00H01L31/022425H01M4/364H01M4/5815H01M4/625H01M10/0525Y02E10/50Y02E60/10
Inventor 刘天西张龙生鲁恒毅樊玮缪月娥黄云鹏顾华昊
Owner FUDAN UNIV
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