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Preparation method of nano Fe3O4 composite graphene and nano Fe3O4 composite graphene

A composite graphene and nanotechnology, applied in the field of nanomaterials, can solve problems such as unstable product quality, low saturation magnetization, and many influencing factors, and achieve high saturation magnetization, good shape, and good repeatability.

Active Publication Date: 2019-04-23
深圳市克得磁材技术有限公司
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Problems solved by technology

Common aqueous solution synthesis such as Fe 2+ with Fe 3+ Co-precipitation of ions under alkaline conditions, the most commonly reported method is in Fe 2+ with Fe 3+ Preparation of Nano-Fe by Dropping Ammonia in Solution 3 o 4 , this method is simple to operate and low in cost, but there are many influencing factors, such as pH value, stirring speed, temperature and system concentration, etc., which often lead to unstable quality of the prepared product, poor repeatability, poor shape and size. Uniform and low saturation magnetization

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  • Preparation method of nano Fe3O4 composite graphene and nano Fe3O4 composite graphene

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[0034] The present invention proposes a kind of nano Fe 3 o 4 The preparation method of composite graphene, this preparation method comprises the following steps:

[0035] dissolving the ferrous salt and the ferric salt in water, and stirring to obtain an iron salt solution;

[0036] Dispersing the graphene oxide solution and / or the reduced graphene oxide solution in an organic alcohol solvent, stirring to obtain a dispersion;

[0037] Mixing the iron salt solution and the dispersion, and adding a precipitant to obtain a mixed solution;

[0038] Move the mixed solution into a reaction kettle, and heat to obtain a reaction product;

[0039] The obtained reaction product was separated, washed and dried to obtain nano-Fe 3 o 4 composite graphene.

[0040] Specifically, a certain amount of ferrous salt and ferric salt is weighed, dissolved in water, and stirred to obtain a uniformly mixed iron salt solution. Generally, ultrapure water is used for water to avoid mixing effec...

Embodiment 1

[0060] Weigh 9.73g FeCl 3 ·6H 2 O and 5.56 g FeSO 4 ·7H 2 O was dissolved in 10mL of ultrapure water, then 4.8g of urea was added, and stirred to obtain a uniform solution. Take 20 mL of GO solution with a concentration of 2 mg / mL and disperse it in a mixed solution of 19 mL of ethylene glycol and 1 mL of polyethylene glycol-200, stir and ultrasonically obtain the dispersion for 20 min and pour it into the homogeneous solution obtained above, and mix and stir for a certain time. After a period of time, it was slowly transferred to a 100mL polytetrafluoroethylene-lined stainless steel autoclave, placed in a constant temperature drying oven, heated and reacted at 160°C for 5h, and then naturally cooled to room temperature after taking out the autoclave. The reaction product obtained after the reaction is a black solution, which is magnetically separated and washed 3-4 times with a mixture of ethanol and ultrapure water at a volume ratio of 1:1, and then placed in a vacuum dry...

Embodiment 2

[0062] Weigh 9.73g FeCl 3 ·6H 2 O and 5.56 g FeSO 4 ·7H 2 O was dissolved in 10mL of ultrapure water, then 4.8g of urea was added, and stirred to obtain a uniform solution. Take 16mL of RGO solution with a concentration of 4mg / mL and disperse it in a mixed solution of 23mL of ethylene glycol and 1mL of polyethylene glycol-400, stir and ultrasonically obtain the dispersion for 20min and pour it into the homogeneous solution obtained above, and mix and stir for a certain time. After a period of time, it was slowly transferred to a 100mL polytetrafluoroethylene-lined stainless steel autoclave, placed in a constant temperature drying oven, heated and reacted at 160°C for 5h, and then naturally cooled to room temperature after taking out the autoclave. The reaction product obtained after the reaction is a black solution, which is magnetically separated and washed 3-4 times with a mixture of ethanol and ultrapure water at a volume ratio of 1:1, and then placed in a vacuum drying ...

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Abstract

The invention discloses a preparation method of nano Fe3O4 composite graphene and nano Fe3O4 composite graphene prepared thereby. The preparation method of the nano Fe3O4 composite graphene includes the following steps of dissolving divalent ferric salt and trivalent ferric salt in water and stirring to obtain a ferric salt solution, dispersing a graphene oxide solution and / or a reduced grapheneoxide solution in an organic alcohol solvent and stirring to obtain a dispersion solution, mixing the ferric salt solution and dispersion solution, adding precipitants therein to obtain a mixture, transferring the mixture into a reactor for heating to obtain a reaction product, and separating, washing and drying the resulting reaction product to obtain the nano Fe3O4 composite graphene. The nano Fe3O4 composite graphene prepared by the above-mentioned technical scheme has the advantages of stable product quality and high saturation intensity.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a nano-Fe 3 o 4 Preparation method of composite graphene and nano Fe prepared by the preparation method 3 o 4 composite graphene. Background technique [0002] In recent years, graphene, as a sp2 hybridized carbon nanomaterial, has attracted great attention and research interest due to its high electronic conductivity, good thermal stability and excellent mechanical strength. Graphene and its derivatives are important filler materials in polymer composites, which can improve the electrical conductivity and mechanical properties of polymers. Since graphene oxide (GO) and reduced graphene oxide (RGO) have defects and residual oxidized functional groups, which can serve as nucleation sites for the growth of metal nanostructures, they can serve as ideal templates for metal nanoparticles, graphene-metal nanostructures Particles are widely used in different fields, such as s...

Claims

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Application Information

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IPC IPC(8): C01G49/08C01B32/184B82Y30/00
CPCB82Y30/00C01B32/184C01G49/08C01P2006/42C01P2004/80
Inventor 奚克里
Owner 深圳市克得磁材技术有限公司
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