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Preparation Method of Structurally Ordered Graphene/Fe3O4 Airgel

An orderly structure, graphene technology, applied in the direction of graphene, ferrous oxide, iron oxide/iron hydroxide, etc., can solve the problem of uneven distribution of three-dimensional system, and achieve the effect of solving high disorder.

Active Publication Date: 2021-04-23
NORTH CHINA INST OF AEROSPACE ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the ferroferric oxide-graphene composite material prepared by this invention has uniform particle size and uniform dispersion, the distribution of the three-dimensional system of the composite material is still uneven.

Method used

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  • Preparation Method of Structurally Ordered Graphene/Fe3O4 Airgel
  • Preparation Method of Structurally Ordered Graphene/Fe3O4 Airgel
  • Preparation Method of Structurally Ordered Graphene/Fe3O4 Airgel

Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1) 20mg graphene oxide (its TEM and SEM pictures are as shown in figure 1 and figure 2 shown) with 23.2mg Fe 3 o 4 After the nanoparticles were homogeneously mixed under the action of ultrasound, graphene / Fe was prepared by hydrothermal method 3 o 4 Hydrogel, the temperature of hydrothermal reaction is 250℃, and the reaction time is 3h.

[0027] (2) Structure-ordered graphene / Fe 3 o 4 Preparation of airgel:

[0028] Take out the sample obtained from the reaction, add a large amount of deionized water to soak to wash away the unreacted monomers, until the deionized water is neutral. The graphene / Fe 3 o 4 The hydrogel is placed in a magnetic field with a strength of 2000 Oe, so that the magnetic nanoparticles are oriented for 20 minutes under the action of the magnetic field, and at the same time, the orientation of the graphene is driven to form a structured three-dimensional graphene / Fe 3 o 4 Hydrogels. The oriented material was quickly frozen in liquid ni...

Embodiment 2

[0033] (1) 10mg graphene oxide (its TEM and SEM pictures are as shown in figure 1 and figure 2 shown) with 20mg Fe 3 o 4 After the nanoparticles were homogeneously mixed under the action of ultrasound, graphene / Fe was prepared by hydrothermal method 3 o 4 Hydrogel, the temperature of hydrothermal reaction is 200 ℃, and the reaction time is 5h.

[0034] (2) Structure-ordered graphene / Fe 3 o 4 Preparation of airgel:

[0035] Take out the sample obtained from the reaction, add a large amount of deionized water to soak to wash away the unreacted monomers, until the deionized water is neutral. The graphene / Fe 3 o 4 The hydrogel is placed in a magnetic field with a strength of 500Oe, so that the magnetic nanoparticles are oriented for 30 minutes under the action of the magnetic field, and at the same time, the orientation of the graphene is driven to form a three-dimensional graphene / Fe with an ordered structure. 3 o 4 Hydrogels. And the oriented material was quickly pl...

Embodiment 3

[0037] (1) 20mg graphene oxide (its TEM and SEM pictures are as shown in figure 1 and figure 2 shown) with 28mg Fe 3 o 4 After the nanoparticles were homogeneously mixed under the action of ultrasound, graphene / Fe was prepared by hydrothermal method 3 o 4 Hydrogel, the temperature of hydrothermal reaction is 350 ℃, and the reaction time is 2h.

[0038] (2) Structure-ordered graphene / Fe 3 o 4 Preparation of airgel:

[0039] Take out the sample obtained from the reaction, add a large amount of deionized water to soak to wash away the unreacted monomers, until the deionized water is neutral. The graphene / Fe 3 o 4 The hydrogel is placed in a magnetic field with a strength of 1000 Oe, so that the magnetic nanoparticles are oriented under the magnetic field for 15 minutes, and at the same time, the orientation of the graphene is driven to form a structured three-dimensional graphene / Fe 3 o 4 Hydrogels. And the oriented material was quickly placed in liquid nitrogen to f...

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Abstract

The invention discloses a structurally ordered graphene / Fe 3 o 4 The preparation method of airgel, this method is based on graphene oxide and Fe 3 o 4 As a raw material, the gel is obtained by hydrothermal reaction, then magnetized in a magnetic field, and frozen with liquid nitrogen, and then dried and shaped to obtain a structured three-dimensional graphene / Fe 3 o 4 Aerogel, in the three-dimensional airgel system with an ordered structure, the graphene skeleton structure builds a conduction channel along the axial direction of the magnetic field to promote the conduction of electrons, phonons, etc. along this direction. The invention solves the problems of high disorder, irregular dispersion and low conduction efficiency of the three-dimensional graphene airgel system.

Description

technical field [0001] The invention relates to the technical field of airgel production, in particular to a structurally ordered graphene / Fe 3 o 4 Airgel preparation method. Background technique [0002] Graphene / Fe 3 o 4 As a new type of magnetic catalytic material, the material is environmentally friendly and reusable. But currently graphene / Fe 3 o 4 Airgel materials are mostly isotropic, structurally disordered materials; or magnetic Fe 3 o 4 The particles are uniformly oriented and distributed under the action of a magnetic field, and have no effect on the graphene skeleton. [0003] He Guangyu of Changzhou University and others disclosed a preparation method of a magnetic nano-ferric oxide-graphene composite catalyst in the patent CN102553593B, which is to use graphite oxide and iron salt at 50-90 ° C and add ammonia water to adjust the pH to 9- The reaction was carried out at 11 ℃, and the product was subjected to magnetic separation, washed with deionized wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184C01G49/08B82Y40/00
CPCB82Y40/00C01G49/08C01P2002/72C01P2004/03C01P2004/04C01P2006/42C01B32/184
Inventor 李双雯李鑫林松张琳
Owner NORTH CHINA INST OF AEROSPACE ENG