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Method for preparing three-dimensional porous graphene material by solution

A three-dimensional porous and graphene technology, applied in the direction of graphene, nano-carbon, etc., can solve the problems of expensive equipment, complicated procedures, low conductivity, etc., and achieve the effect of high specific surface area and economical preparation method

Inactive Publication Date: 2014-11-12
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

"Three-dimensional flexible and conductive interconnected graphene networks grown by chemical vapor deposition" (Zongping Chen, Libo Gao, HuiMing Cheng, et al. Nature Materials, 2011, 10: 424-428) realized the three-dimensional structure of graphene through vapor deposition , and used to fabricate flexible, stretchable graphene / polymer composite conductors, but this requires more complex procedures and more expensive equipment
Noble-Metal-Promoted Three-Dimensional Macroassembly of Single-Layered Graphene Oxide (Shuling Shen, Jing Zhuang, Xun Wang, et al..Angew.Chem.2010, 122, 4707–4711) achieves graphene in solution by utilizing noble metals 3D assembly, but the resulting graphene material shows low conductivity due to incomplete reduction of oxides, structural defects, etc.

Method used

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  • Method for preparing three-dimensional porous graphene material by solution
  • Method for preparing three-dimensional porous graphene material by solution
  • Method for preparing three-dimensional porous graphene material by solution

Examples

Experimental program
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preparation example Construction

[0021] Specifically, the preparation method of graphene three-dimensional porous material comprises the following steps:

[0022] (1) Immerse the three-dimensional porous template in the graphene oxide solution, and then use physical or chemical methods to deposit graphene oxide on the template to realize the three-dimensional assembly of graphene oxide on the template, and then prepare a compound containing Template for graphene 3D porous material.

[0023] The three-dimensional porous template is selected from any metal or non-metal three-dimensional porous material. Metal materials can be composed of nickel, copper and other single metals or alloys. The non-metallic three-dimensional porous material can be composed of polyurethane and the like. The deposition of graphene oxide on the template can adopt the three-dimensional assembly of solution evaporation-induced physisorption.

[0024] Reduction can be induced using heat or a reducing agent vapor atmosphere. The graph...

example 1

[0031] Example 1. Preparation of graphene three-dimensional porous material

[0032] The first step is to clean the nickel three-dimensional porous membrane plate (such as figure 1 )

[0033] The nickel three-dimensional porous membrane plate was ultrasonically cleaned with deionized water, acetone, and ethanol, and then dried.

[0034] The second step, three-dimensional assembly of graphene oxide on the template

[0035] The nickel three-dimensional porous membrane plate is immersed in 20ml of 1mg / ml graphene oxide solution ultrasonically for half an hour, and then slowly evaporated to dryness at 60 degrees, and slowly evaporates the solvent at 60 degrees to induce graphene oxide on the foamed nickel deposition (eg figure 2 ) (if a film is formed on the liquid surface during this process, it should be removed immediately, otherwise it will affect the further adsorption of the template), and finally add a small amount of hydrazine hydrate solution to reduce the graphene ox...

example 2

[0038] Example 2. Preparation of graphene three-dimensional porous material

[0039] The first step is to clean the nickel three-dimensional porous membrane plate

[0040] The nickel three-dimensional porous membrane plate is ultrasonically cleaned with deionized water, acetone, and ethanol, and then dried;

[0041] The second step, three-dimensional assembly of graphene oxide on the template

[0042] The nickel three-dimensional porous membrane plate is immersed in 20ml of 1mg / ml graphene oxide solution ultrasonically for half an hour, and the solvent is slowly evaporated at 60 degrees to induce the deposition of graphene oxide on the foamed nickel (if a thin film is formed on the liquid surface during the process should be removed immediately, otherwise it will affect the further adsorption of the template), and finally add a small amount of sodium borohydride solution to reduce the graphene oxide.

[0043] The third step, remove the nickel foam template

[0044] Take out...

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Abstract

The invention discloses a method for preparing a three-dimensional porous graphene material by solution. The method comprises the following steps of: immersing a three-dimensional porous template into a graphene oxide solution, and then depositing the graphene oxide on the template to realize three-dimensional assembling of the graphene oxide on the template, and then preparing the three-dimensional porous graphene material containing the template by reduction; removing the template from the three-dimensional porous graphene material containing the template, and then washing to obtain the three-dimensional porous graphene material. The aperture of the three-dimensional porous graphene material can be regulated and controlled by using the templates with different apertures the material prepared by the invention has the advantages of low density, high specific surface area, high heat conductivity, high-temperature resistance, and corrosion resistance; the preparation method is economical and simple and suitable for large-scale production. And the prepared material is applicable to aspects such as catalytic carriers, preparation of flexible conductors, and stretchable electronics.

Description

technical field [0001] The invention belongs to the graphene three-dimensional porous material technology, in particular to a method for preparing a three-dimensional graphene three-dimensional porous material from a solution. Background technique [0002] Single-layer carbon atom crystal structure: Graphene has excellent photoelectric and mechanical properties, and can be used in fields such as field-effect transistors, sensors, and single-molecule detectors. The three-dimensional structure composed of graphene as the basic unit and its composite materials with polymers, ceramics and metals may be applied to controllable gas permeability films, supercapacitors, lithium-ion batteries, molecular storage, hydrogen storage, electrochemical sensing, Functional materials such as fuel cells, energy catalysis, flexible electronic conductors and electronic devices. "Three-dimensional flexible and conductive interconnected graphene networks grown by chemical vapor deposition" (Zongp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04C01B32/184
Inventor 王帅张哲野戴军
Owner HUAZHONG UNIV OF SCI & TECH
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