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Multi-edge WS2 nanosheet/graphene composite nanomaterial and preparation method

A composite nanomaterial, graphene composite technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc.

Inactive Publication Date: 2014-10-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, so far, multi-edge WS 2 Nanosheet and graphene composite nanomaterials and their preparation have not been reported yet

Method used

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  • Multi-edge WS2 nanosheet/graphene composite nanomaterial and preparation method
  • Multi-edge WS2 nanosheet/graphene composite nanomaterial and preparation method
  • Multi-edge WS2 nanosheet/graphene composite nanomaterial and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]1) Ultrasonic disperse 2.5 mmol graphene oxide in 60 mL deionized water, then add 0.5 mL ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate (see figure 1 Schematic diagram), and stir well;

[0025] 2) Then add 0.76g (6.25 mmol) L-cysteine ​​and 1.25 mmol ammonium thiotungstate in sequence, and keep stirring to completely dissolve L-cysteine ​​and ammonium thiotungstate, adjust with deionized water Volume up to about 80 mL;

[0026] 3) Transfer the obtained mixed solution to a 100 mL hydrothermal reaction kettle, put the reaction kettle into a constant temperature oven, and after hydrothermal reaction at 240 °C for 24 h, let it cool down to room temperature naturally, and collect the solid by centrifugation The product was fully washed with deionized water and dried under vacuum at 100 °C. The obtained hydrothermal solid product was heat-treated at 500 °C for 2 h in a nitrogen / hydrogen mixed atmosphere, and the volume fraction of hydrogen in the mixed gas was 10%...

Embodiment 2

[0034] 1) Ultrasonic disperse 3.75 mmol graphene oxide in 60 mL deionized water, then add 1.0 mL ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate, and stir thoroughly;

[0035] 2) Then add 0.76 g (6.25 mmol) L-cysteine ​​and 1.25 mmol ammonium thiotungstate in sequence, and keep stirring to completely dissolve L-cysteine ​​and ammonium thiotungstate, adjust with deionized water Volume up to about 80 mL;

[0036] 3) Transfer the obtained mixed solution to a 100 mL hydrothermal reaction kettle, put the reaction kettle into a constant temperature oven, and after hydrothermal reaction at 240 °C for 24 h, let it cool down to room temperature naturally, and collect the solid by centrifugation The product was fully washed with deionized water and dried under vacuum at 100 °C. The obtained hydrothermal solid product was heat-treated at 500 °C for 2 h in a nitrogen / hydrogen mixed atmosphere, and the volume fraction of hydrogen in the mixed gas was 10%. Preparation get multie...

Embodiment 3

[0038] 1) Ultrasonic disperse 2.5 mmol graphene oxide in 60 mL deionized water, then add 1.5 mL ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate, and stir thoroughly;

[0039] 2) Then add 12.5 mmol L-cysteine ​​and 2.5 mmol ammonium thiotungstate in sequence, and keep stirring to completely dissolve L-cysteine ​​and ammonium thiotungstate, adjust the volume to about 80 with deionized water mL;

[0040] 3) Transfer the obtained mixed solution to a 100 mL hydrothermal reaction kettle, put the reaction kettle into a constant temperature oven, and after hydrothermal reaction at 240 °C for 24 h, let it cool down to room temperature naturally, and collect the solid by centrifugation The product was fully washed with deionized water and dried under vacuum at 100 °C. The obtained hydrothermal solid product was heat-treated at 500 °C for 2 h in a nitrogen / hydrogen mixed atmosphere, and the volume fraction of hydrogen in the mixed gas was 10%. Preparation get multiedge WS 2 ...

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Abstract

The invention discloses a multi-edge WS2 nanosheet / graphene composite nanomaterial and a preparation method thereof. The multi-edge WS2 nanosheet / graphene composite nanomaterial is composited by multi-edge WS2 nanosheets with a few layers and graphene, and a substance ratio of WS2 nanosheets to graphene is (1:1)-(1:4). The preparation method comprises the steps as follows: graphene oxide is ultrasonically dispersed in deionized water firstly, added with an ionic liquid, sufficiently stirred and then sequentially added with L-cysteine and ammonium thiotungstate, and L-cysteine and ammonium thiotungstate are sufficiently stirred and dissolved; and the hybrid dispersion is transferred to a hydrothermal reaction kettle to have a hydrothermal reaction for 24 hours at the temperature of 240 DEG C and is naturally cooled to the room temperature, and solid products are collected centrifugally, sufficiently washed by deionized water, dried and subjected to thermal treatment finally to prepare the multi-edge WS2 nanosheet / graphene composite nanomaterial. The method has the advantages of simplicity and convenience and is prone to enlargement of industrial application.

Description

technical field [0001] The present invention relates to composite nanomaterials and preparation methods thereof, in particular to multi-edge WS 2 The nanosheet / graphene composite nanomaterial and its hydrothermal preparation method belong to the technical field of inorganic composite nanomaterials. Background technique [0002] Two-dimensional nanomaterials have many excellent properties due to their unique morphology, and their research has aroused great interest. Graphene is the most typical two-dimensional nanomaterial. Its unique two-dimensional nanosheet structure gives it many unique physical, chemical and mechanical properties. It has important scientific research significance and broad technical application prospects. Graphene has extremely high specific surface area, high electrical and thermal conductivity, high charge mobility, and excellent mechanical properties. These excellent properties make graphene widely used in micro-nano electronic devices, energy stora...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/62B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/366H01M4/5815H01M4/625H01M2004/021Y02E60/10
Inventor 陈涛陈卫祥马琳孙虎叶剑波陈倩男
Owner ZHEJIANG UNIV
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