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Graphene/MoS2 graphene and amorphous carbon composite material and preparation method thereof

A technology of amorphous carbon and composite materials, applied in electrical components, battery electrodes, circuits, etc., to achieve super-mechanical properties, high mechanical properties, and enhanced electrical conductivity

Inactive Publication Date: 2011-08-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, this graphene nanosheet / MoS 2 There are no public reports on the composite material of graphene-like nanosheets and amorphous carbon and its preparation method

Method used

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  • Graphene/MoS2 graphene and amorphous carbon composite material and preparation method thereof
  • Graphene/MoS2 graphene and amorphous carbon composite material and preparation method thereof
  • Graphene/MoS2 graphene and amorphous carbon composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Graphene nanosheets and MoS 2 Preparation method of composite nanomaterial of graphene-like nanosheet and amorphous carbon:

[0018] 1) Preparation of graphite oxide nanosheets: Disperse 1.25mmol (0.015g) of graphite powder into 20mL of concentrated sulfuric acid in an ice bath at 0°C, and add KMnO 4 , the added KMnO 4 The mass of graphite is 3 times that of graphite, stir for 30 minutes, the temperature rises to about 30°C, add 45ml of deionized water, stir for 20 minutes, add 10ml of 30% H 2 o 2, stirred for 5 minutes, centrifuged, and repeatedly washed with a mass concentration of 5% HCl solution, deionized water and acetone to obtain graphite oxide nanosheets;

[0019] 2) Dissolve 1.25mmol (0.303g) of sodium molybdate in 63ml of deionized water to form a 0.02M solution, add 6.25mmol of thiourea and 1g (5.56mmol) of glucose, stir evenly, and the mixture of thiourea and sodium molybdate The ratio of mass is 5.0: 1, and the ratio of the mass of glucose to sodium mo...

Embodiment 2

[0021] Graphene nanosheets and MoS 2 Preparation method of composite nanomaterial of graphene-like nanosheet and amorphous carbon:

[0022] 1) Preparation of graphite oxide nanosheets: Disperse 2.5mmol (0.03g) of graphite powder into 24mL of concentrated sulfuric acid in an ice bath at 0°C, and add KMnO 4 , the added KMnO 4 The mass of graphite is 3.5 times that of graphite, stir for 40 minutes, the temperature rises to about 34 ° C, add 45 ml of deionized water, stir for 25 minutes, add 12 ml of 30% H 2 o 2 , stirred for 7 minutes, centrifuged, and repeatedly washed with a mass concentration of 5% HCl solution, deionized water and acetone to obtain graphite oxide nanosheets;

[0023] 2) Dissolve 1.25mmol (0.303g) of sodium molybdate in 63ml of deionized water to form a 0.02M solution, add 7.5mmol of thioacetamide and 1g (5.56mmol) of glucose and stir well, in which thioacetamide and molybdenum The ratio of the amount of substance of sodium molybdate is 6: 1, and the ratio...

Embodiment 3

[0025] Graphene nanosheets and MoS 2 Preparation method of composite nanomaterial of graphene-like nanosheet and amorphous carbon:

[0026] 1) Preparation of graphite oxide nanosheets: Disperse 5.0 mmol (0.06 g) of graphite powder into 25 mL of concentrated sulfuric acid in an ice bath at 0 °C, and add KMnO 4 , the added KMnO 4 The mass of graphite is 4 times that of graphite, stir for 50 minutes, the temperature rises to about 35°C, add 50ml of deionized water, stir for 30 minutes, add 15ml of H2O with a mass concentration of 30% 2 o 2 , stirred for 10 minutes, centrifuged, and repeatedly washed with a mass concentration of 5% HCl solution, deionized water and acetone to obtain graphite oxide nanosheets;

[0027] 2) Dissolve 1.25mmol (0.303g) sodium molybdate in 63ml of deionized water to form a 0.02M solution, add 10mmol of thioacetamide and 1g (5.56mmol) of glucose and stir well, thioacetamide and molybdenum The ratio of the mass of sodium molybdate is 8: 1, the ratio o...

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Abstract

The invention discloses a graphene nanometer sheet / MoS2 graphene nanometer sheet and amorphous carbon composite material and a preparation method thereof. The composite material is characterized by being composed of the following components in percentage by weight: 4.2-15% of graphene nanometer sheet, 4.2-65% of MoS2 graphene nanometer sheet and the balance of amorphous carbon, wherein the molar ratio of the graphene nanometer sheet to the MoS2 graphene nanometer is (1:1)-(4:1). The preparation method comprises the following steps: preparing graphite into graphite nanometer sheets by a chemical oxidation method; then evenly dispersing the oxidized graphite nanometer sheets into a solution containing molybdate, thioacetamide or thiourea and glucose; obtaining an intermediate product by virtue of hydrothermal reaction; and carrying out heat treatment on the intermediate product at high temperature to obtain the graphene nanometer sheet / MoS2 graphene nanometer sheet and amorphous carbon composite material. The method disclosed by the invention has the characteristics of moderate reaction condition and simple process. The graphene nanometer sheet / MoS2 graphene nanometer sheet and amorphous carbon composite material, which is synthetized by the invention, can be widely applied by serving as an electrochemical storage lithium electrode material, an electrochemical storage magnesium electrode material and a catalyst carrier.

Description

technical field [0001] The present invention relates to a graphene and MoS 2 The graphene-like and amorphous carbon composite material, its preparation method and its preparation method belong to the field of inorganic composite nanometer material, new energy material and its preparation. Background technique [0002] MoS 2 It has a typical sandwich layer structure, the inner layer (S-Mo-S) is a strong covalent bond, and the interlayer is a weaker van der Waals force, and the layers are easy to peel off. MoS 2 With good anisotropy and low friction factor, MoS 2 It can be well attached to the metal surface and play a lubricating function, especially under high temperature, high vacuum and other conditions, it still has a low friction coefficient, and is an excellent solid lubricant. MoS 2 It is also a good catalyst carrier for catalytic desulfurization. In addition, MoS with a layered structure 2 As the host lattice, it can react with different guest atoms or molecules...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M4/1393
CPCY02E60/12Y02E60/122Y02E60/10
Inventor 陈卫祥常焜李辉马琳
Owner ZHEJIANG UNIV
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