Hydrothermal preparation method for composite material of single-layer WS2 and graphene
A graphene composite and composite material technology, applied in chemical instruments and methods, base materials, petroleum industry, etc., can solve the problems of long time, high sensitivity, large consumption of organic solvents, etc., and achieve the effect of simple process
Inactive Publication Date: 2014-05-21
ZHEJIANG UNIV
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Problems solved by technology
[0006] However, so far, single-layer WS 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
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[0020] Below in conjunction with embodiment further illustrate the present invention.
[0021] Graphene oxide in the following examples is prepared by the improved Hummers method: at 0 o Under an ice bath, stir and disperse 5.0-10.0 mmol (0.06-0.12 g) of graphite powder into 30 mL of concentrated sulfuric acid, and slowly add KMnO 4 , the added KMnO 4 The mass is 4 times that of graphite powder, stir for 50 minutes, when the temperature rises to 35°C, slowly add 50 ml of deionized water, stir for another 30 minutes, add 15 ml of 30% H 2 o 2 , stirred for 30 minutes, centrifuged, and successively washed repeatedly with 5% HCl solution, deionized water and acetone to obtain graphene oxide.
[0022] Embodiment 1.
[0023] 1) Ultrasonic disperse 2.5 mmol graphene oxide in 60 mL deionized water, then add 1.6 mmol cetyltrimethylammonium bromide cationic surfactant, and stir thoroughly;
[0024] 2) Then add 0.75g (6.19 mmol) L-cysteine and 0.41g (1.24 mmol) sodium tungstate (N...
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The invention discloses a hydrothermal preparation method for a composite material of single-layer WS2 and graphene. A composite nanometer material consists of the single-layer WS2 and the graphene, which are compounded, wherein the mass ratio of the single-layer WS2 to the graphene is 1:1 to 1:4. The method comprises the following steps of: ultrasonically dispersing a graphene oxide into de-ionized water, sequentially adding a cationic surfactant, L-cysteine and sodium tungstate with stirring, transferring a mixed disperse system into a hydrothermal reaction kettle, performing hydrothermal reaction for 24 hours at 180 to 200 DEG C, naturally cooling a reaction product, centrifugally collecting solid products, washing the solid products by using the de-ionized water, drying the washed solid products, and performing heat treatment in a nitrogen / hydrogen mixed atmosphere to obtain the composite nanometer material of the single-layer WS2 and the graphene. A process is simple, and the consumption of an organic solvent is avoided.
Description
technical field [0001] The present invention relates to single layer WS 2 The invention discloses a hydrothermal preparation method of composite materials with graphene, which belongs to the technical field of preparation 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 for new energy batteries, solid lubricants and new cata...
Claims
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IPC IPC(8): H01M4/583C10M103/00B01J32/00B01J27/047B82Y40/00C10N50/08
CPCY02E60/12Y02E60/10
Inventor 陈卫祥黄国创王臻马琳李赫
Owner ZHEJIANG UNIV