Graphene nano sheet/MoS2 composite nano material and synthesis method thereof

A graphene nanosheet, composite nanomaterial technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve the effects of super mechanical properties, enhanced electrochemical properties, and high specific surface area

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, such graphene nanosheets and MoS 2 Composite nanomaterials of nanomaterials and their preparation methods have not been publicly reported

Method used

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  • Graphene nano sheet/MoS2 composite nano material and synthesis method thereof
  • Graphene nano sheet/MoS2 composite nano material and synthesis method thereof
  • Graphene nano sheet/MoS2 composite nano material and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Graphene: MoS2 (mol ratio) =1: 1 preparation:

[0021] 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 0.03g of 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;

[0022] 2) Dissolve 1.25mmol (0.303g) sodium molybdate in 63ml deionized water to form a 0.02M solution, add 6.25mmol of thiourea and stir evenly, the ratio of thiourea to sodium molybdate is 5.0:1, Then the graphite oxide nanosheets prepared by the graphite of 1) step in 1.25mmol (0.015g) are added in the solution, the amount of the substance of the graphite...

Embodiment 2

[0025] Embodiment 2: Graphene: MoS2 (mol ratio)=2: 1 preparation:

[0026] 1) Preparation of graphite oxide nanosheets: Disperse 2.5mmol (0.03g) of graphite powder into 25mL 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 40 minutes, the temperature rises to about 33 ° C, add 50ml of deionized water, stir for 25 minutes, add 12ml of H2O with a mass concentration of 30% 2 o 2 , stirred for 5-10 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) of sodium molybdate in 63ml of deionized water to form a 0.02M solution, add 7.5mmol of thioacetamide and stir evenly, wherein the ratio of the amount of thioacetamide to sodium molybdate It is 6: 1, then the 1st) step adds in this solution the graphite oxide nanosheet that the graphite of 2.5mmol ...

Embodiment 3

[0028] Embodiment 3: Graphene: MoS2 (molar ratio)=3: 1

[0029] 1) Preparation of graphite oxide nanosheets: Disperse 6.0 mmol (0.072 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 3.5 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 20ml 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;

[0030] 2) Dissolve 2.0mmol of ammonium molybdate in 60ml of deionized water to form a 0.03M solution, add 16mmol of thiourea and stir evenly, the ratio of thiourea to sodium molybdate is 8:1, and then the first) Add the graphite oxide nanosheets prepared by the graphite of 6.0mmol (0.072g) into the solution, the amount X of the used graphite ...

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Abstract

The invention discloses a graphene nano sheet / MoS2 composite nano material and a synthesis method thereof. The method comprises the following steps of: preparing a graphite oxide nano sheet from graphite by using a chemical oxidation method, then dissolving molybdate into deionized water to form a solution of 0.02 to 0.07M, and adding thioacetamide or thiourea serving as a sulfur source and a reducer, wherein the mass ratio of the thioacetamide or the thiourea to the molybdate is 5:1-12:1; and adding the graphite oxide nano sheet into the solution, performing ultrasonic treatment for 1 to 2 hours so that the graphite oxide nano sheet is fully dispersed in a hydrothermal reaction solution, transferring the mixture into a hydrothermal reaction kettle, sealing, reacting for 20 to 36 hours at the temperature of between 220 and 260 DEG C, and obtaining the graphene nano sheet / molybdenum disulfide composite nano material by one-step hydrothermal synthesis, wherein the mass ratio of the graphene nano sheet to the molybdenum disulfide in the composite material is 1:2-4:1. The method has the characteristics of mild reaction condition and simple process. The synthesized graphene nano sheet / molybdenum disulfide composite nano material serving as an electrochemical lithium storage and electrochemical magnesium storage electrode material has wide application.

Description

technical field [0001] The invention relates to a composite nanomaterial and its preparation, in particular to a graphene nanosheet / molybdenum disulfide composite nanomaterial and a preparation method thereof, and belongs to the technical field of composite nanomaterials and new energy materials and their preparation. Background technique [0002] MoS 2 It has a typical sandwich layered structure, with strong covalent bonds (S-Mo-S) in the layers and weak van der Waals forces between the layers, 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. layered MoS 2 As a host material, guest atoms or molecules can be inserted between the hos...

Claims

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Application Information

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IPC IPC(8): H01M4/36B82Y30/00B82Y40/00
CPCY02E60/12Y02E60/10
Inventor 陈卫祥常焜陈涛马琳
Owner ZHEJIANG UNIV
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