Preparation method of magnetic graphene aerogel

A technology of magnetic graphene and graphene hydrogel, which is applied in the preparation of magnetic graphene airgel and the field of magnetic aerogel preparation, can solve the problems of complex preparation of magnetic graphene foam materials in large quantities, and achieve mechanical properties Good, wide application prospect, low density effect

Active Publication Date: 2017-09-08
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI +2
View PDF5 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of extrudable and super-hydrophobic magnetic graphene foam material with low cost, simple synthesis method and easy large-scale production in order to solve the technical problem of complex preparation of magnetic graphene foam material in large quantities and limit

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of magnetic graphene aerogel
  • Preparation method of magnetic graphene aerogel
  • Preparation method of magnetic graphene aerogel

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1

[0020] a. Dissolve graphite oxide in deionized water and disperse it ultrasonically to form a uniform graphene oxide aqueous solution with a concentration of 1 mg / mL;

[0021] b. Add 0.5mg / mL dopamine and 0.1mg / mL ferric nitrate to the graphene oxide solution obtained in step a, stir it evenly with magnetic force, and keep it for 24 hours under hydrothermal conditions at a constant temperature of 100℃ to obtain graphene hydrogel glue;

[0022] c. Freeze-dry the graphene hydrogel obtained in step b for 1 day to obtain a freeze-dried sample;

[0023] d. Heat the freeze-dried sample obtained in step c in an oxygen-free environment at a temperature of 1°C / min, heat it up to 800°C, keep it for 6 hours, and then cool it naturally to obtain a magnetic graphene aerogel material.

Example Embodiment

[0024] Example 2

[0025] a. Dissolve graphite oxide in deionized water and ultrasonically disperse it to form a uniform graphene oxide aqueous solution with a concentration of 2 mg / mL;

[0026] b. Add 0.75mg / mL dopamine and 5mg / mL ferric chloride to the graphene oxide solution obtained in step a, stir it evenly with a magnetic force, and keep it for 18 hours under hydrothermal conditions at a constant temperature of 120℃ to obtain graphene hydrogel glue;

[0027] c. Freeze-dry the graphene hydrogel obtained in step b for 1 day to obtain a freeze-dried sample;

[0028] d. Heat the freeze-dried sample obtained in step c in an oxygen-free environment at a temperature of 3°C / min, heat it up to 850°C, keep it for 4 hours, and then cool it naturally to obtain a magnetic graphene aerogel material.

Example Embodiment

[0029] Example 3

[0030] a. Dissolve graphite oxide in deionized water and disperse it ultrasonically to form a uniform graphene oxide aqueous solution with a concentration of 4 mg / mL;

[0031] b. Add 1 mg / mL dopamine and 10 mg / mL ferric sulfate to the graphene oxide solution obtained in step a, stir evenly with a magnetic force, and keep it for 12 hours under hydrothermal conditions at a constant temperature of 140°C to obtain a graphene hydrogel;

[0032] c. Freeze-dry the graphene hydrogel obtained in step b for 1 day to obtain a freeze-dried sample;

[0033] d. Heat the freeze-dried sample obtained in step c in an oxygen-free environment at a temperature of 5°C / min, heat it up to 900°C, keep it for 2 hours, and then cool it naturally to obtain a magnetic graphene aerogel material.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a preparation method of magnetic graphene aerogel. The preparation method comprises the steps of crosslinking dopamine modified graphene oxide with iron ions, carrying out heating reduction and self-assembling to form a three-dimensional graphene aerogel structure, and carrying out freeze drying and thermal treatment, so as to obtain a magnetic graphene aerogel material in situ. The preparation method which is simple in operation and preparation process and low in cost is utilized for preparing the magnetic graphene aerogel material with stable structure and good uniformity in situ and is a new technique for massively preparing the magnetic graphene aerogel material. The prepared material has good magnetic property, low density, good mechanical property, high temperature resistance, large specific surface area, super-strong adsorptive property, conductive property and wave absorbing property, is hopeful to be used as a novel functional magnetic material in the fields of water treatment, photoelectric materials, wave absorbing materials and the like and further has certain application values and market prospects.

Description

technical field [0001] The invention relates to a preparation method of a magnetic aerogel, in particular to a preparation method of a magnetic graphene aerogel, and belongs to the field of environmental functional materials. Background technique [0002] Magnetic porous materials have the characteristics of large specific surface area and light weight. At the same time, they also have the advantages of magnetic response and biocompatibility of magnetic materials. They have potential applications in the fields of water treatment, catalysis, biological applications, and microwave absorption. The above application fields not only require good magnetic properties, meet the necessary conditions for easy material recovery, strong targeting ability, and microwave adsorption, but also need to have the characteristics of low density, strong adsorption capacity, large specific surface area, and strong loading capacity. It is difficult for some materials to meet multiple performance r...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01B32/184C01B32/194B01J13/00B01J20/28B01J20/20B01J20/30
CPCB01J13/0091B01J20/20B01J20/28009C01B2204/20C01P2006/10
Inventor 杨苏东马鹏程王春春胡美龙
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap