Macroscopic three-dimensional ultralight Fe3O4 doped graphene aerogel composite material and preparation method

A graphene aerogel and composite material technology, which is applied in the field of macroscopic three-dimensional Fe3O4 graphene aerogel ultra-light composite material and preparation, and achieves the effects of mild reaction conditions, simple preparation and easy mass production

Active Publication Date: 2015-10-28
ZHENGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no reports on macroscopic three-dimensional Fe3O4 doped graphene airgel ultralight composite materials and preparation methods, and Fe3 The combination of sub>O4 and GA is a functional material that can improve the properties of both, and has potential applications in sewage treatment, stealth, biomedicine, new energy and electronic materials, etc.

Method used

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  • Macroscopic three-dimensional ultralight Fe3O4 doped graphene aerogel composite material and preparation method
  • Macroscopic three-dimensional ultralight Fe3O4 doped graphene aerogel composite material and preparation method
  • Macroscopic three-dimensional ultralight Fe3O4 doped graphene aerogel composite material and preparation method

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Experimental program
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Effect test

Embodiment 1

[0033] Step 1, pretreatment graphite powder

[0034] At room temperature and under magnetic stirring conditions, add 35 g of graphite powder to 520 mL of a mixed acid solution (1:3) of concentrated nitric acid and concentrated sulfuric acid and stir for 24 hours. Add high-purity water to dilute to 1.5L, and then filter and wash to neutrality (pH = 7) with a glass sand core filter device with a filter membrane pore size of 0.45 μm to obtain a filter cake, and dry the obtained filter cake at 60°C for 2 After a few days, it was ground and processed in batches at 1100°C for 30s to obtain pretreated graphite powder.

[0035] Step 2, preparing graphene oxide solution

[0036] Using the pretreated graphite powder obtained in step 1 as raw material, the graphite oxide solution was prepared by the traditional Hummer method, and then the graphene oxide solution was obtained by ultrasonic stripping, with a concentration of about 4.0 mg / mL.

[0037] Step 3, preparing ferric hydroxide co...

Embodiment 2

[0048] Step one to step three are the same as embodiment 1.

[0049] Step 4, preparation of macroscopic three-dimensional Fe 3 o 4 Graphene airgel ultra-light composite material:

[0050] Fe(OH) 3 The mass ratio with graphene oxide is 1: 1,

[0051] ① Take 15 mL of the graphene oxide solution prepared in step 2 and dilute it with 15 mL of high-purity water, then adjust its pH to 9 with ammonia water under magnetic stirring, and then sonicate for 1 hour to prepare a diluted graphene oxide solution;

[0052] ② At room temperature, the 1.8mLFe(OH) prepared in step 3 3 Add the colloid dropwise to the diluted graphene oxide solution prepared in ①, and stir for 1 hour to make a reaction solution;

[0053] ③ Transfer the reaction solution prepared in ② into a 50mL hydrothermal kettle, and let it stand at 180°C for 24h; then cool the hydrothermal kettle to room temperature to obtain Fe 2 o 3 Graphene hydrogel;

[0054] ④ Fe to be obtained 2 o 3 The graphene hydrogel was move...

Embodiment 3

[0058] Step one to step three are the same as embodiment 1.

[0059] Step 4, preparation of macroscopic three-dimensional Fe 3 o 4 Graphene airgel ultra-light composite material:

[0060] Fe(OH) 3 The mass ratio with graphene oxide is 1.5: 1,

[0061] ① Take 15 mL of the graphene oxide solution prepared in step 2 and dilute it with 15 mL of high-purity water, then adjust its pH to 9 with ammonia water under magnetic stirring, and then sonicate for 1 hour to prepare a diluted graphene oxide solution;

[0062] ② At room temperature, the 2.7mLFe(OH) prepared in step 3 3 Add the colloid dropwise to the diluted graphene oxide solution prepared in ①, and stir for 1h;

[0063] ③ Transfer the reaction solution prepared in ② into a 50mL hydrothermal kettle, and let it stand at 180°C for 24h; then cool the hydrothermal kettle to room temperature to obtain Fe 2 o 3 Graphene hydrogel;

[0064] ④ Fe to be obtained 2 o 3 The graphene hydrogel was moved to ammonia water with a con...

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Abstract

The invention belongs to the technical field of functional materials and relates to a macroscopic three-dimensional ultralight Fe3O4 doped graphene aerogel composite material and a preparation method. According to the preparation method, firstly, expanded graphite powder is taken as a raw material, graphene oxide is prepared with an improved Hummers method, and ferric trichloride is thermally hydrolyzed to prepare ferric hydroxide colloid; secondly, the ferric hydroxide colloid is dropwise added into a graphene oxide solution, and a hydrothermal reduction reaction is performed to obtain Fe3O4 doped graphene aerogel; and finally, hydrothermal treatment by ammonia water and vacuum freeze-drying are performed to obtain the macroscopic three-dimensional ultralight Fe3O4 doped graphene aerogel composite material. In percentage by weight, the Fe3O4 content is 0-65% and the balance is graphene aerogel. The synthetic method for the Fe3O4 doped graphene aerogel composite material is simple, feasible, easy to control, small in specific gravity, large in surface area and outstanding in porous characteristic, and can be used in the fields of sewage treatment, stealth, biological medicines, new energy, electronic materials and the like.

Description

technical field [0001] The invention belongs to the technical field of functional materials, in particular to a macroscopic three-dimensional Fe 3 o 4 Graphene airgel ultra-light composite material and preparation method. Background technique [0002] As a ferrite discovered and used by humans earlier, Fe 3 o 4 With unique magnetic and electrical properties, relatively simple preparation method and good chemical stability, it is widely used as magnetic materials, catalysts, abrasives, sewage treatment agents, special electrodes, etc. Graphene is a new type of carbon material after fullerene and carbon nanotubes. 2 The hybridized carbon atoms are arranged in a hexagonal lattice to form a sheet-like monolayer, which has excellent electrical, mechanical and chemical properties. However, two-dimensional graphene is easily stacked in a parallel manner, which greatly reduces its specific surface area. Conventional Fe 3 o 4 There are also deficiencies such as small specific ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/52C04B35/26C04B35/624
Inventor 郑修成孟婧珂刘玉山索阳关新新张建民
Owner ZHENGZHOU UNIV
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