Method for preparing graphene sponge based on traditional sponge serving as template

A graphene sponge, graphene technology, applied in graphene, chemical instruments and methods, inorganic chemistry and other directions, can solve problems such as size limitation, and achieve the effects of high production efficiency, uniform dispersion and low cost

Active Publication Date: 2014-05-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention solves the problem that the size of the existing graphene sponge products is limited by equipment, and provides a method for preparing graphene sponges based on traditional sponges as templates

Method used

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  • Method for preparing graphene sponge based on traditional sponge serving as template
  • Method for preparing graphene sponge based on traditional sponge serving as template
  • Method for preparing graphene sponge based on traditional sponge serving as template

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Experimental program
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specific Embodiment approach 1

[0023] Specific embodiment one: a kind of method described in this embodiment based on traditional sponge is that template prepares graphene sponge, specifically carries out according to the following steps:

[0024] 1. Preparation of graphene oxide: at a stirring speed of 100r / min to 800r / min, add natural flake graphite to sulfuric acid and phosphoric acid mixed acid to prepare a mixture, stir the mixture for 10min to 60min, and then pour it into the stirred Potassium permanganate is added to the mixture in 3 to 10 times to obtain the mixture after adding potassium permanganate. At a temperature of 30°C to 80°C and a stirring speed of 200r / min to 800r / min, the potassium permanganate will be added The final mixture was placed in a water bath and stirred at a constant temperature for 4h to 20h to obtain a stirred mixture at a constant temperature. Then, the mixture stirred at a constant temperature was added to ice water, and hydrogen peroxide with a mass fraction of 30% was add...

specific Embodiment approach 2

[0036]Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mixed acid of sulfuric acid and phosphoric acid described in step 1 is a mixture of phosphoric acid with a mass fraction of 10% to 85% and sulfuric acid with a mass fraction of 10% to 98%; The volume ratio of the sulfuric acid with a mass fraction of 10%-98% to the phosphoric acid with a mass fraction of 10%-85% is (3-10):1. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0037] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the mass ratio of the volume of sulfuric acid and phosphoric acid mixed acid described in step one to the natural flake graphite is (10mL~120mL): 1g. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for preparing graphene sponge based on traditional sponge serving as a template, relates to the method for preparing the graphene sponge, and mainly solves the problem that the size of the conventional graphene sponge product is limited by equipment. The method comprises the following steps: first, preparing graphene oxide; second, reducing the graphene oxide; third, preparing graphene dispersion liquid; fourth, preparing the graphene sponge by an electrophoresis method; fifth, performing drying treatment to obtain a graphene sponge material based on the traditional sponge serving as the template. By the method, a large-size sample can be prepared; the method can be widely applied to industrial production. The method is used for preparing the graphene sponge based on the traditional sponge serving as the template.

Description

technical field [0001] The invention relates to a method for preparing graphene sponge. Background technique [0002] Graphene is defined as a two-dimensional honeycomb lattice structure composed of only a single layer of carbon atoms tightly packed, and each carbon atom forms covalent bonds with three adjacent carbon atoms. Although graphene is only composed of one layer of carbon atoms, its morphology can be observed by various instruments to characterize important information such as the number of layers, thickness, and degree of crystallization of graphene. Each carbon atom in graphene has one s orbital and three p orbitals, among which the s orbital and two p orbitals form chemical bonds with the surrounding three adjacent carbon atoms, which do not contribute to the conductivity of graphene, while the remaining One p orbital is hybridized with each other to form valence band and conduction band, which affects the electrical properties of graphene. [0003] The unique...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K3/04C01B31/04C25D13/02C25D13/12C01B32/184C01B32/194
Inventor 李宜彬秦余杨赫晓东李建军魏丽红
Owner HARBIN INST OF TECH
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