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Hydrothermal preparation method for single-layer MoS2 and graphene composite nano material

A graphene composite and nano-material technology, applied in chemical instruments and methods, catalyst carriers, physical/chemical process catalysts, etc., can solve the problems of large organic solvent consumption, long time, high sensitivity, etc., to achieve no consumption of organic solvents, The effect of simple process

Inactive Publication Date: 2012-10-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, so far, single-layer MoS 2 The preparation of lithium ion is mainly based on the method of intercalation and stripping of lithium ions. This method has the following disadvantages: it is highly sensitive to the environment such as air and moisture, it needs to consume a large amount of organic solvent, and it takes a long time.
However, so far, this method has not been publicly reported

Method used

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  • Hydrothermal preparation method for single-layer MoS2 and graphene composite nano material
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  • Hydrothermal preparation method for single-layer MoS2 and graphene composite nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Ultrasonically disperse 2.5 mmol of graphene oxide in 60 mL of deionized water, then add 1.6 mmol of cetyltrimethylammonium bromide cationic surfactant, and stir thoroughly;

[0027] 2) Then add 0.75g (6.19 mmol) L-cysteine ​​and 0.3 g (1.24 mmol) sodium molybdate (Na 2 MoO 4 2H 2 O), and constantly stirring to completely dissolve L-cysteine ​​and sodium molybdate;

[0028]3) Transfer the obtained mixed solution to a 100 mL hydrothermal reaction kettle, and add deionized water to adjust the volume to 80 mL, put the reaction kettle in a constant temperature oven, and react hydrothermally at 240 °C for 24 h, let It was naturally cooled to room temperature, and the solid product was collected by centrifugation, washed thoroughly with deionized water, and dried under vacuum at 100°C;

[0029] 4) The solid product obtained above was heat-treated at 800 °C for 2 h in a nitrogen / hydrogen mixed atmosphere to prepare monolayer MoS 2 Composite nanomaterials with graphene, ...

Embodiment 2

[0034] 1) Ultrasonic disperse 2.5 mmol of graphene oxide in 60 mL of deionized water, then add 2.4 mmol of cetyltrimethylammonium bromide cationic surfactant, and stir thoroughly;

[0035] 2) Then add 0.75g (6.19 mmol) L-cysteine ​​and 0.3 g (1.24 mmol) sodium molybdate (Na 2 MoO 4 2H 2 O), and constantly stirring to completely dissolve L-cysteine ​​and sodium molybdate;

[0036] 3) Transfer the obtained mixed solution to a 100 mL hydrothermal reaction kettle, and add deionized water to adjust the volume to 80 mL, put the reaction kettle in a constant temperature oven, and react hydrothermally at 230 °C for 24 h, let It was naturally cooled to room temperature, and the solid product was collected by centrifugation, washed thoroughly with deionized water, and dried under vacuum at 100°C;

[0037] 4) The solid product obtained above was heat-treated at 800 °C for 2 h in a nitrogen / hydrogen mixed atmosphere to prepare monolayer MoS 2 Composite nanomaterials with graphene, the...

Embodiment 3

[0040] 1) Ultrasonic disperse 2.5 mmol of graphene oxide in 60 mL of deionized water, then add 4.0 mmol of cetyltrimethylammonium bromide cationic surfactant, and stir thoroughly;

[0041] 2) Then add 0.75g (6.19 mmol) L-cysteine ​​and 0.3 g (1.24 mmol) sodium molybdate (Na 2 MoO 4 2H 2 O), and constantly stirring to completely dissolve L-cysteine ​​and sodium molybdate;

[0042] 3) Transfer the obtained mixed solution to a 100 mL hydrothermal reaction kettle, and add deionized water to adjust the volume to 80 mL, put the reaction kettle in a constant temperature oven, and react hydrothermally at 250 °C for 24 h, let It was naturally cooled to room temperature, and the solid product was collected by centrifugation, washed thoroughly with deionized water, and dried under vacuum at 100°C;

[0043] 4) The solid product obtained above was heat-treated at 800 °C for 2 h in a nitrogen / hydrogen mixed atmosphere to prepare monolayer MoS 2 Composite nanomaterials with graphene, the...

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Abstract

The invention discloses a hydrothermal preparation method for single-layer MoS2 and a graphene composite nano material. The composite material is formed by compounding the single-layer MoS2 and graphene, wherein a molar ratio of the single-layer MoS2 to the graphene is (1:1)-(1:4). The preparation method comprises the following steps of: performing ultrasonic dispersion on graphene oxide in deionized water, stirring, adding a cation surfactant, and adding L-cysteine and sodium molybdate sequentially; transferring the mixed dispersed system into a hydrothermal reaction kettle, performing hydrothermal reaction at the temperature of between 220 and 250 DEG C for 24 hours, and cooling naturally; centrifuging and collecting a solid product, washing the product by using deionized water, drying, and performing heat treatment under mixed atmosphere of nitrogen / hydrogen. The method has the advantages of simplicity and convenience, and an organic solvent is not required.

Description

technical field [0001] The present invention relates to the preparation method of composite nano material, especially relates to monolayer MoS 2 The invention discloses a hydrothermal preparation method of composite materials with graphene, which belongs to the technical field of inorganic composite nanomaterials. Background technique [0002] Recently, the study of single-layer 2D nanomaterials has attracted great interest. As we all know, graphene is the most single-layer two-dimensional nanomaterial currently studied. Graphene has many unique physical, chemical and mechanical properties due to its unique two-dimensional nanosheet structure, which has important scientific research significance and broad application prospects. . Graphene has extremely high specific surface area, high electrical and thermal conductivity, high charge mobility, and excellent mechanical properties. Graphene has broad application prospects as micro-nano electronic devices, electrode materials...

Claims

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Application Information

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IPC IPC(8): B01J27/047B01J32/00
Inventor 陈卫祥黄国创王臻马琳
Owner ZHEJIANG UNIV
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