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Preparation method of water-dispersible graphene/ferroferric oxide (Fe3O4) composite powder

A composite powder, graphene technology, applied in ferrous oxides, ferric oxide/ferric hydroxide and other directions, can solve the problems of limiting the application field of composite materials, poor composite dispersion, and many process steps, etc. Achieving good application prospects, easy industrial production, and good compounding effects

Inactive Publication Date: 2012-07-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Currently preparing graphene / Fe 3 o 4 The method of composite materials mainly has the following defects: more process steps, higher cost, and poor dispersion of the prepared composite in aqueous solution, which limits the application field of this composite material
At present, there is no preparation of the above-mentioned water-dispersed graphene / Fe 3 o 4 Composite powder report

Method used

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  • Preparation method of water-dispersible graphene/ferroferric oxide (Fe3O4) composite powder
  • Preparation method of water-dispersible graphene/ferroferric oxide (Fe3O4) composite powder
  • Preparation method of water-dispersible graphene/ferroferric oxide (Fe3O4) composite powder

Examples

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Effect test

Embodiment 1

[0026] Weigh 100mg of graphite oxide and 1g of sodium polystyrene sulfonate into a beaker, then add 100ml of deionized water, and disperse ultrasonically for 45min at a power of 300W. After the dispersion is uniform, pour the above dispersion into a three-necked flask and heat up To 100°C, react for 12h. Weigh 366mg of ferric chloride hexahydrate and 134mg of ferrous chloride tetrahydrate into the above reaction solution under the protection of nitrogen atmosphere, then add 1ml of ammonia water, cool down to 80°C for 30min, then add 0.0752g of oleic acid to continue the reaction for 90min. At the end of the reaction, the graphene / Fe is collected with a magnet 3 o 4 The composite powder was washed with deionized water, and then the product was dried at 60 °C for 18 h. figure 1 For the transmission electron microscope photo of the synthetic powder of this embodiment, it can be seen that: Fe 3 o 4 Nanoparticles are uniformly attached to the surface and interlayer of graphene,...

Embodiment 2

[0028]Weigh 50mg of graphite oxide and 1g of sodium polystyrene sulfonate into a beaker, then add 100ml of deionized water, and ultrasonically disperse for 60min at a power of 200W. After the dispersion is uniform, pour the above dispersion into a three-necked flask and heat up To 110°C, react for 8h. Weigh 110mg of ferric chloride hexahydrate and 40mg of ferrous chloride tetrahydrate into the above reaction solution under the protection of nitrogen atmosphere, then add 0.3ml of ammonia water, cool down to 70°C for 40min, then add 0.0226g of oleic acid to continue the reaction for 80min. At the end of the reaction, the graphene / Fe is collected with a magnet 3 o 4 The composite powder was washed with deionized water, and then the product was dried at 40 °C for 24 h. Transmission electron microscope observations showed that: Fe 3 o 4 The particle size of the nanoparticles is about 5nm, and they are well compounded with graphene. Observation by high-resolution transmission e...

Embodiment 3

[0030] Weigh 200mg of graphite oxide and 1g of sodium polystyrene sulfonate into a beaker, then add 100ml of deionized water, and ultrasonically disperse for 30min at a power of 400W. After the dispersion is uniform, pour the above dispersion into a three-necked flask and heat up To 90°C, react for 16h. Weigh 146mg of ferric chloride hexahydrate and 54mg of ferrous chloride tetrahydrate into the above reaction solution under the protection of nitrogen atmosphere, then add 0.4ml of ammonia water, cool down to 90°C for 20min, then add 0.032g of oleic acid to continue the reaction for 100min. At the end of the reaction, the graphene / Fe is collected with a magnet 3 o 4 The composite powder was washed with deionized water, and then the product was dried at 80 °C for 12 h. Transmission electron microscope observations showed that: Fe 3 o 4 The particle size of the nanoparticles is about 5nm, and they are well compounded with graphene. Observation by high-resolution transmission...

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Abstract

The invention relates to a preparation method of water-dispersible graphene / ferroferric oxide (Fe3O4) composite powder. The method comprises the following steps of: (1) ultrasonically dispersing graphite oxide and sodium polystyrene sulfonate into water at room temperature to form reaction liquid, raising a temperature to 90 to 110 DEG C, and reacting for 8 to 16 hours; (2) adding ferric salt andferrous salt into the reaction liquid under the protection of nitrogen atmosphere at room temperature, adding ammonia water, reducing the temperature to 70 to 90 DEG C, reacting for 20 to 40 minutes,and then adding an oleic acid for continuous reaction; and (3) cooling to room temperature, collecting the graphene / Fe3O4 composite powder by using a magnet, washing and drying to obtain the finishedproduct. The method is simple and easy for industrial production; Fe3O4 in the prepared composite powder has pure crystalline phase; the Fe3O4 is well combined with the graphene; the Fe3O4 has good dispersibility on a surface of the graphene and in a layer of the graphene; the composite powder is low in resistivity, high in magnetic intensity and good in underwater dispersibility and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of preparation of graphene-based composite materials, in particular to a preparation method of water-dispersed graphene / Fe3O4 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 discovered that graphene-based composite materials also have excellent properties such as high hardness and high electrical conductivity. G.Williams et al reported on ACS Nano 2(2008) 1487-1491 using TiO 2 Photocata...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04C01G49/08
Inventor 李耀刚侯成义王宏志张青红
Owner DONGHUA UNIV
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