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A method for preparing controllable network three-dimensional graphene through chemical bond connection

A graphene and chemical bond technology, applied in the field of nanomaterials, can solve the problems of inconspicuous spatial network structure, insufficient connection force between sheets, limiting three-dimensional graphene, etc., and achieves the effect of wide application prospect and stable structure.

Active Publication Date: 2016-01-06
慧迈材料科技(广东)有限公司
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Problems solved by technology

[0005] The chemical bonds between the three-dimensional graphene sheets prepared by this kind of inorganic method are mainly connected by ionic bonds or van der Waals force, and the connection force between the sheets is not tight enough, which leads to the weak mechanical properties of graphene and the inconspicuous spatial network structure. To a large extent, the application of three-dimensional graphene is limited

Method used

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  • A method for preparing controllable network three-dimensional graphene through chemical bond connection
  • A method for preparing controllable network three-dimensional graphene through chemical bond connection
  • A method for preparing controllable network three-dimensional graphene through chemical bond connection

Examples

Experimental program
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Embodiment 1

[0027] 1. Preparation of Graphite Oxide

[0028] Add 4 g of graphite to 90 ml of concentrated H 2 SO 4 (98%) solution, stirred in ice bath for 30min, then slowly added 11.8g of KMnO 4 , stirred for 30min; then reacted the solution in an oil bath at 30°C for 2h, then slowly added 120ml of deionized water (drip speed 4~6s / drop) to the solution to dilute the solution; then heated the solution to 90°C for 30min, added Dilute the solution with 210ml of deionized water; then cool the solution to 60°C, add 10ml of H 2 o 2 (30%) to obtain an orange-yellow solution; then add 500ml of 5% HCl solution, let stand for 3h and pour out the supernatant to remove metal ions; then use deionized water for centrifugal washing to remove excess acid until the solution is neutral properties; and then freeze-dry the obtained solution in a lyophilizer with a temperature of -48°C and a pressure lower than 18Pa to obtain low-density graphene oxide (GO).

[0029] 2. Grafting 1,8-octanediamine on gra...

Embodiment 2

[0034] According to the method of Example 1, 4-4-methine-bis(2-chloroaniline) (BisAmineA / S) was used instead of 1,8-octanediamine as a link between GO sheets, according to the mass ratio GO:GOD=1:1 ratio to configure GO and GOD mixture, add solvent, configure a mixed solution with a concentration of 5mg / ml, put it into a polytetrafluoroethylene reactor, and prepare three-dimensional network graphene at a temperature of 180°C .

Embodiment 3

[0036] According to the method of Example 1, 4,4-bis(4-aminophenoxy)biphenyl (BAPB) was used instead of 1,8-octanediamine as a link between GO sheets, according to the mass ratio of GO: The ratio of GOD=1:6 is used to configure the mixture of GO and GOD, add a solvent to prepare a mixed solution with a concentration of 8 mg / ml, put it into a polytetrafluoroethylene reactor, and prepare three-dimensional network graphene at a temperature of 150 °C.

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Abstract

The invention discloses a method for preparing controllable network three-dimensional graphene through chemical bond connection. The technical solution of the invention includes: using graphite as a basic material to make graphene oxide sheets, connecting the graphene oxide sheets through chemical bonds to form a network-shaped three-dimensional graphene. The present invention forms regular ups and downs of three-dimensional graphene by adjusting the reaction temperature and proportioning concentration, that is, forms open and closed cell structures at different temperatures and concentrations; the three-dimensional graphene prepared by the present invention can be applied in supercapacitors, oil-absorbing , seawater desalination and other fields.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a method for preparing net-like three-dimensional graphene. Background technique [0002] Graphene, a kind of SP 2 Hybrid planar two-dimensional structures. Since its discovery in 2004, it has become a new member of the carbon family (zero-dimensional fullerene, one-dimensional carbon nanotubes, two-dimensional graphene and three-dimensional graphite). Because of its unique two-dimensional structure, it has the advantages of light weight, high strength, high transparency, and good conductivity, and can be widely used in energy, environment, sensing, and biology. Known as "the new material of the 21st century", research on it has also emerged in an endless stream in recent years. [0003] In recent years, the use of three-dimensional graphene spatial network structure to load nanoscale molecules has become a research hotspot, because the three-dimensiona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04C01B32/184
Inventor 闵永刚童宋照刘屹东杨文斌范天举宋建军
Owner 慧迈材料科技(广东)有限公司
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