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Molybdenum selenide nanosheets/graphene nanoribbons composite material and preparation method thereof

A technology of graphene nanobelts and composite materials, which is applied in the direction of binary selenium/tellurium compounds, nanotechnology, nanotechnology, etc., can solve the problems of poor electrical conductivity and the inability to fully utilize the excellent properties of molybdenum selenide, etc., and achieve the preparation process Simple, effective and quick preparation method, ingenious effect of experimental design

Inactive Publication Date: 2016-04-06
FUDAN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, pure molybdenum selenide 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, selenium The excellent properties of molybdenum will not be fully utilized

Method used

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  • Molybdenum selenide nanosheets/graphene nanoribbons composite material and preparation method thereof
  • Molybdenum selenide nanosheets/graphene nanoribbons composite material and preparation method thereof
  • Molybdenum selenide nanosheets/graphene nanoribbons composite material and preparation method thereof

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Embodiment 1

[0046] Embodiment 1, This embodiment includes the following steps:

[0047] (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;

[0048] (2) Add 750mg potassium permanganate to the above dispersion, add in batches, and keep stirring;

[0049] (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;

[0050] (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;

[0051] (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;

[0052] (6) Centrifugal drying to obtain solid graphene oxide nanorib...

Embodiment 2

[0059] Embodiment 2, Change the consumption of the selenium powder dispersion liquid in embodiment 1 into 2.5mL, the quality of sodium molybdate becomes 15.32mg, all the other are the same as embodiment 1, the composite material finally obtained is denoted as GNRMoSe 2 -1.

Embodiment 3

[0060] Embodiment 3, Change the consumption of the selenium powder dispersion liquid in embodiment 1 into 5mL, the quality of sodium molybdate becomes 30.64mg, all the other are the same as embodiment 1, the composite material finally obtained is denoted as GNRMoSe 2 -2.

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Abstract

The invention belongs to the technical field of a transition metal chalcogenide-carbon material, and specifically relates to a molybdenum selenide nanosheets / graphene nanoribbons composite material and its preparation method. According to the invention, graphene nanoribbons are prepared by a solution oxidization method, and then molybdenum selenide nanosheets grow in situ on the graphene nanoribbons by a solvothermal method. The prepared graphene nanoribbons have advantages of stable chemical property, high length-to-diameter ratio and the like. The prepared composite material has characteristic of controllable morphology. As molybdenum selenide nanosheets are uniformly loaded on the graphene nanoribbons, agglomeration of molybdenum selenide itself is effectively inhibited, and the particular high specific surface area and high conductivity of the graphene nanoribbons are fully utilized. The prepared molybdenum selenide nanosheets / graphene nanoribbons composite material can become an ideal high-performance electrochemical hydrogen evolution catalytic material and electrode material of new energy devices such as lithium ion battery and solar cell, etc.

Description

technical field [0001] The invention belongs to the technical field of transition metal chalcogenide-carbon materials, and in particular relates to a molybdenum selenide nanosheet / graphene nanoribbon 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] Molybdenum selenide is a typical transition metal chalcogenide. It belongs to the hexagonal crystal system. There are strong Se-Mo-Se covalent bonds in the layer and weak van der Waals for...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B19/04B82Y30/00
CPCC01B19/04C01P2002/72C01P2004/03C01P2004/04C01P2006/40
Inventor 刘天西顾华昊左立增樊玮黄云鹏鲁恒毅张龙生
Owner FUDAN UNIV
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