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Magnetic carbon-based iron oxide compound material and preparation method thereof

A composite material and iron oxide technology, which is applied in the fields of magnetic/electric field water/sewage treatment, electrical components, battery electrodes, etc., can solve problems such as high process requirements, high impurity content in products, and cumbersome steps

Active Publication Date: 2013-09-04
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These preparation methods have high process requirements, cumbersome steps, high content of impurities in the product, and the hydrazine hydrate commonly used to reduce graphene oxide has certain toxicity, so these methods have potential safety hazards.
[0005] Therefore, it is still a challenge to find an effective preparation method for carbon-based Fe3O4 composites that is environmentally friendly and easy to operate.

Method used

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  • Magnetic carbon-based iron oxide compound material and preparation method thereof
  • Magnetic carbon-based iron oxide compound material and preparation method thereof
  • Magnetic carbon-based iron oxide compound material and preparation method thereof

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preparation example Construction

[0069] The invention provides a preferred method for preparing a magnetic carbon-based iron oxide composite material, comprising the steps of:

[0070] (a) providing a mixture comprising a carbon-based precursor, elemental iron, and a solvent;

[0071] The elemental iron can be industrial grade or experimental grade commonly used reducing elemental iron; for example, it can be selected from: nanoscale iron powder (preferably 1 mm), or a combination thereof; can also be selected from: electrolytic iron powder, reduced iron method, carbonyl iron powder, atomized iron powder Wait.

[0072] The mass ratio of the elemental iron to the carbon-based precursor is 1:20˜20:1.

[0073] The solvent may be selected from the group consisting of water, alcohol (preferably C 1-4 Alcohol refers to alcohol containing 1-4 carbon atoms), acetone, tetrahydrofuran, ether, triethylamine, or a combination thereof. The water may be deionized water, distilled water, purified water, etc.

[0074] (b...

Embodiment 1

[0087] Embodiment 1 Carbon-based iron oxide composite material 1

[0088] Weigh 300 mg of glucose and dissolve it in 60 mL of deionized water, add 50 mg of reduced iron powder with a particle size of 5-20 μm, and stir evenly.

[0089] The resulting mixed solution was added into a stainless steel reactor with a polytetrafluoroethylene liner, the lid of the stainless steel reactor was tightened and placed in an oven at 180° C. for 12 hours.

[0090] The stainless steel reaction kettle was taken out to cool naturally, the black precipitate was separated from the solution using a magnet, and dried at 50°C to obtain the carbon-based iron oxide composite material 1.

[0091] In this process, glucose is carbonized into activated carbon, and the reduced iron powder reacts with the hydroxyl groups on the surface of glucose at high temperature to form iron oxides.

[0092] Perform EDS component analysis and X-ray diffraction identification on the final product, such as Figure 5 with ...

Embodiment 2

[0094] Embodiment 2 Carbon-based iron oxide composite material 2

[0095] Weigh 20mg of spherical graphite, disperse it in 60mL of concentrated nitric acid and concentrated sulfuric acid with a volume ratio of 1:3, acidify by ultrasonic treatment at 80°C for 1 hour, cool, and wash with deionized water to obtain modified spherical graphite. In one process, the surface of spherical graphite is hydroxylated and carboxylated.

[0096] Add the modified spherical graphite into a beaker containing 60 mL of a mixed solution of deionized water and ethanol with a volume ratio of 1:1, add 100 mg of electrolytic iron powder with a particle size of about 40 μm, and stir magnetically at 80 °C in an oil bath for 2 hours.

[0097] The beaker was taken out and naturally cooled to room temperature, the black precipitate was separated and dried by a magnet, and dried at 50°C to obtain the carbon-based iron oxide composite material 2.

[0098] EDS component analysis and X-ray diffraction identif...

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Abstract

The invention discloses a magnetic carbon-based iron oxide compound material and a preparation method of the magnetic carbon-based iron oxide compound material. Particularly, the invention discloses a prepraation method of the magnetic carbon-based iron oxide compound material. The preparation method comprises the following steps of: (a) providing a mixture comprising a carbon-based precursor, elemental iron and a solvent; and (b) carrying out heating reaction on the mixture in the step (a), thus obtaining the carbon-based iron oxide compound material. The method has the advantages that materials are common and are easily available, and the process is simple, safe and effective and the like. The obtained compound material has stable magnetism, and is wide in application.

Description

technical field [0001] The invention belongs to the field of magnetic composite materials, in particular, the invention relates to a magnetic carbon-based iron oxide composite material and a preparation method thereof. Background technique [0002] Ferric oxide, alias iron oxide black, magnetite, has magnetism and excellent conductivity, and is widely used in magnetic separation, magnetic targeting drugs, concentration and inspection of biomolecules, magnetic recording, magnetic resonance imaging, peroxidase-like Catalysis, electromagnetic wave absorption, battery electrode materials, magnetic black pigments and other fields. However, ferroferric oxide, especially nano-scale iron ferric oxide, has a high surface energy, and its structure is easy to agglomerate. Usually, nanomaterials are loaded on a specific carrier to inhibit structural agglomeration, expand the specific surface area, and fully bind the carrier. Material and functional properties of Fe3O4. [0003] Curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52H01M4/62C02F1/48
CPCY02E60/10
Inventor 范同祥张培珍
Owner SHANGHAI JIAO TONG UNIV
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