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Preparation method for magnetic carbon-coated ferroferric oxide nano-composite material

A technology for carbon-coated ferric tetroxide and composite materials, which is applied in the preparation/purification of carbon, iron oxide/iron hydroxide, nanotechnology, etc., and can solve the problems of poor stability, easy agglomeration, and surface functional groups of magnetic nanoparticles. Less problems, to achieve the effect of improving solubility, preventing agglomeration, and simple method operation

Inactive Publication Date: 2012-05-09
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is: in order to overcome Fe 3 o 4 Magnetic nanoparticles have poor stability, easy agglomeration, and few surface functional groups. To improve the physical and chemical properties of magnetic materials and expand the application range of nanocomposites, a carbon-coated ferroferric oxide magnetic nanocomposite is proposed. method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Example 1 Preparation of carbon-coated Fe3O4 magnetic nanocomposites

[0010] bulk FeCl 3 ·6H 2 O was ground into powder, weighed 1.24g of the powder with an electronic balance and put it in a clean beaker, and poured 55 ml of ethylene glycol into the above beaker with a measuring cylinder, stirred on a magnetic stirrer; then weighed with an electronic balance Pour 2.74g of urea and 0.36g of cyclodextrin powder into the above solution, and stir for a certain period of time; transfer the above solution to a polytetrafluoroethylene-lined stainless steel reactor, and react at a constant temperature of 200°C and a pressure of 0.111MPa for 24 hours; After the reaction is over, take out the reaction kettle and cool it to room temperature, pour the solution in the kettle into a beaker and carry out sedimentation and separation under the action of an external magnetic field, take out the solid phase mixture in the lower layer, wash it with deionized water three times, and th...

Embodiment 2

[0011] Example 2 Preparation of carbon-coated Fe3O4 magnetic nanocomposites

[0012] bulk FeCl 3 ·6H 2 O was ground into powder, weighed 1.24g of the powder with an electronic balance and put it in a clean beaker, and poured 55 ml of ethylene glycol into the above beaker with a measuring cylinder, stirred on a magnetic stirrer; then weighed with an electronic balance Pour 2.75g of urea and 0.37g of cyclodextrin powder into the above solution, and stir for a certain period of time; transfer the above solution to a polytetrafluoroethylene-lined stainless steel reactor, and react at a constant temperature of 200°C and a pressure of 0.110MPa for 12 hours; After the reaction is over, take out the reaction kettle and cool it to room temperature, pour the solution in the kettle into a beaker and carry out sedimentation and separation under the action of an external magnetic field, take out the solid phase mixture in the lower layer, wash it with deionized water three times, and th...

Embodiment 3

[0013] Example 3 Preparation of carbon-coated Fe3O4 magnetic nanocomposites

[0014] bulk FeCl 3 ·6H 2 O was ground into powder, weighed 1.25g of the powder with an electronic balance and put it in a clean beaker, and poured 55 ml of ethylene glycol into the above beaker with a measuring cylinder, stirred on a magnetic stirrer; then weighed with an electronic balance Pour 2.74g of urea and 0.36g of cyclodextrin powder into the above solution, and stir for a certain period of time; transfer the above solution to a polytetrafluoroethylene-lined stainless steel reactor, and react at a constant temperature of 0.109MPa at 200°C for 6h; After the reaction, the reaction kettle was taken out and cooled to room temperature, the solution in the kettle was poured into a beaker to carry out sedimentation and separation under the action of an external magnetic field, and the solid phase mixture of the lower layer was washed three times with deionized water and then washed three times wi...

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PUM

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Abstract

The present invention relates to a preparation method for a magnetic carbon-coated ferroferric oxide nano-composite material by a one-step carbonization reaction method. With the present invention, physical properties and chemical properties of the magnetic material are improved, and the application range of the nano-composite material is enlarged. The technical scheme of the present invention is that: massive FeCl3.6H2O is crushed into powder; the FeCl3.6H2O powder is placed in a beaker; then glycol is added, and a uniform stirring treatment is performed; urea and cyclodextrin powder are added to the resulting solution, and a uniform stirring treatment is performed; then the resulting mixing solution is transferred to a reaction kettle, and a reaction is performed for 6-24 hours at a temperature of 180-200 DEG C and under pressure of 0.105-0.150 MPa; finally, the mixing solution is cooled to the room temperature, treatments of sedimentation, separation and washing are performed, then a drying treatment is performed for 4-8 hours at the temperature of 80 DEG C to prepare the magnetic carbon-coated ferroferric oxide nano-composite material. According to the present invention, the preparation method is simple; the cost is low; the particle size of the product is small; the particles are the core-shell structures, wherein the Fe3O4 is the core, the carbon-coated layer is the amorphous carbon, and the surface of the carbon-coated layer contains hydroxyl groups; the material of the present invention is adopted as the catalyst carrier, and is applicable for wastewater treatments.

Description

Technical field [0001] The present invention involves a preparation method for preparing carbonized carbon -to -tiny -oxidized triangular nanomanoplasmic materials with a one -step method. Background technique [0002] The chemical properties of carbon are stable, and its nanoparticles have biological affinity and unique spectral characteristics. Carbon covering Fe 3 O 4 The nano composite material formed by the core shell structure formed by magnetic nanoparticles is a new type of functional composite material. Its special nuclear shell structure protects the Fe 3 O 4 The stability of nanomaterials effectively overcome the characteristics of the magnetic nanoparticles poor stability, easy to reunite, and less surface function groups.It has shown extremely important application prospects in many areas, such as biological testing, targeted conversion of drugs, cell separation and catalytic, DNA detection, magnetic records, and with its significant magnetic and qi and humida sensit...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01G49/08B82Y30/00B82Y40/00C01B32/05
Inventor 张辉刘德磊李蒙曾莉莉
Owner SOUTHWEST PETROLEUM UNIV
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