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Method for preparing graphene/Fe3O4 composite powder by alcohol thermal method

A composite powder, graphene technology, applied in the direction of ferrous oxide, iron oxide/iron hydroxide, etc., can solve the problems of high cost, incomplete crystallization, many process steps, etc., and achieve low resistivity and difficult to achieve. Good reunion and compounding effect

Inactive Publication Date: 2010-09-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the current preparation of graphene / Fe 3 o 4 The composite method mainly has the following defects: more process steps, higher cost, and the obtained Fe 3 o 4 incomplete crystallization
Graphene / Fe has not been prepared by alcohol thermal method 3 o 4 Composite powder report

Method used

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  • Method for preparing graphene/Fe3O4 composite powder by alcohol thermal method
  • Method for preparing graphene/Fe3O4 composite powder by alcohol thermal method
  • Method for preparing graphene/Fe3O4 composite powder by alcohol thermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 500mg of ferric chloride and 50mg of graphite oxide into a three-necked flask, then add 50ml of ethylene glycol, and stir thoroughly. Then add 0.92g of anhydrous sodium acetate, 1.5ml of polyethylene glycol 200, and mechanically stir for 30min at a rotation speed of 500rpm. After it is completely dissolved, pour the above solution into the reaction kettle and heat up to 200°C. Reaction 12h. At the end of the reaction, the product was collected with a magnet, washed with deionized water, and then dried at 60 °C for 16 h to obtain graphene / Fe 3 o 4 Composite powder. figure 1 For the transmission electron microscope photo of the synthetic powder of this embodiment, it can be seen that: Fe 3 o 4 The particle size of nano-microspheres is 100-200nm, Fe 3 o 4 The nanospheres are evenly attached to the graphene surface and interlayer, and no free Fe outside the graphene is observed. 3 o 4 particles. figure 2 It is the high-resolution transmission electron micro...

Embodiment 2

[0032] Weigh 50mg of ferric chloride and 50mg of graphite oxide into a three-necked flask, then add 50ml of ethylene glycol, and stir thoroughly. Then add 80 mg of anhydrous sodium acetate, 1.0 ml of polyethylene glycol 400, and mechanically stir for 40 minutes at a rotation speed of 300 rpm. 8h. At the end of the reaction, the product was collected with a magnet, washed with deionized water, and then dried at 40 °C for 24 h to obtain graphene / Fe 3 o 4 Composite powder. Transmission electron microscope observations showed that: Fe 3 o 4 The particle size of the nano-microsphere is 100-200nm, and it is well compounded with graphene. Observation by high-resolution transmission electron microscopy shows that: the Fe in the composite powder 3 o 4 Nanospheres are composed of multiple Fe 3 o 4 Nanocrystalline grains are oriented and aggregated, and graphene sheets are composed of 5 to 20 layers of graphene. The XRD test results show that the nanoparticles in the composite ...

Embodiment 3

[0034] Weigh 2.5g of ferric chloride and 25mg of graphite oxide into a three-necked flask, then add 50ml of ethylene glycol, and stir thoroughly. Then add 9.0 g of anhydrous sodium acetate, 2.0 ml of polyethylene glycol 1000, and mechanically stir for 20 min at a rotation speed of 600 rpm. After it is completely dissolved, pour the above solution into the reaction kettle and heat up to 180 ° C. Reaction 16h. At the end of the reaction, the product was collected with a magnet, washed with deionized water, and then dried at 80 °C for 12 h to obtain graphene / Fe 3 o 4 Composite powder. Transmission electron microscopy observations showed that: Fe 3 o 4 The particle size of the nano-microsphere is 100-200nm, and it is well compounded with graphene. Observation by high-resolution transmission electron microscopy shows that: the Fe in the composite powder 3 o 4 Nanospheres are composed of multiple Fe 3 o 4 The nanocrystalline grains are oriented and aggregated, and the graph...

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Abstract

The invention relates to a method for preparing graphene / Fe3O4 composite powder by an alcohol thermal method, which comprises the following steps of: (1) weighing oxidated graphite and ferric salt at room temperature, dispersing into a glycol solution, adding polyethylene glycol after dissolving completely, then adding anhydrous sodium acetate, stirring and forming reaction liquid; (2) putting into a reaction kettle, heating to the temperature of 180 to 220 DEG C and reacting for 8 to 16h; and (3) cooling to the room temperature, collecting a product by using a magnet, washing the product by deionized water and drying so as to obtain the graphene / Fe3O4 composite powder. In the invention, the preparation method is simple and is easy for industrialized production; and Fe3O4 in the prepared graphene / Fe3O4 composite powder has pure crystalline phase, little possibility of agglomeration, favorable compounding with graphene and good dispersibility at the surface of the graphene and in the layer of the graphene, and the composite powder has small resistivity and high magnetization intensity.

Description

technical field [0001] The invention belongs to graphene / Fe 3 o 4 The field of preparation of composite powders, especially related to the preparation of graphene / Fe by an alcohol thermal method 3 o 4 Method of composite powder. Background technique [0002] Graphene is a new type of two-dimensional planar carbon nanomaterial discovered in 2004. Its special single atomic layer structure determines its rich and novel physical properties. In the past few years, graphene has become a hot topic of high-profile research. Studies have shown that graphene has the characteristics of ultra-thin, ultra-strong and super-conductive properties, and is expected to be widely used in nanoelectronic devices, composite materials, energy storage, and biomedicine. [0003] In recent years, researchers have found that graphene-based composite materials can significantly improve the hardness, electrical conductivity and other properties of the composite. G.Williams et al reported on ACS Nan...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01G49/08
Inventor 李耀刚侯成义王宏志张青红朱美芳
Owner DONGHUA UNIV
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