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Graphene paper with adjustable porous structure

A technology of graphene paper and porous structure, applied in the direction of graphene, inorganic chemistry, non-metallic elements, etc., can solve the problems of not having a porous structure, and achieve the effects of easy mass production, excellent adsorption capacity, and huge specific surface area

Inactive Publication Date: 2019-11-22
安徽聚科生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these graphene films or papers do not have a rich porous structure due to the preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A graphene paper with an adjustable porous structure is prepared from a graphene gel precursor through a series of post-processing steps.

[0032] A controllable porous structure graphene paper, the preparation method comprising the steps of:

[0033] (1) Graphene oxide was obtained by oxidizing graphite powder through the improved Hummers method;

[0034] (2) Add graphene oxide into 20% ethanol solution, and ultrasonically disperse to obtain a 5 mg / mL graphene oxide solution;

[0035] (3) Seal the graphene oxide solution into a closed reactor and keep it at 120°C for 16 hours to obtain a graphene hydrogel, soak the hydrogel in 20% ethanol aqueous dialysate and dialyze for 12 hours;

[0036] (4) After the sample hydrogel was compacted at 10MPa, it was frozen at -5°C and then thawed. Five freeze-thaw cycles, followed by air-drying, resulted in graphene paper.

Embodiment 2

[0038] A graphene paper with an adjustable porous structure is prepared from a graphene gel precursor through a series of post-processing steps.

[0039] A controllable porous structure graphene paper, the preparation method comprising the steps of:

[0040] (1) Graphene oxide was obtained by oxidizing graphite powder through the improved Hummers method;

[0041] (2) Add graphene oxide into 20% ethanol solution, and ultrasonically disperse to obtain a 6mg / mL graphene oxide solution;

[0042] (3) Seal the graphene oxide solution into a closed reactor and keep it at 120°C for 16 hours to obtain a graphene hydrogel, soak the hydrogel in 3% ethanol aqueous dialysate and dialyze for 15 hours;

[0043] (4) After the sample hydrogel was compacted at 10MPa, it was frozen at -5°C and then thawed. Five freeze-thaw cycles followed by drying by freeze-drying yielded graphene paper.

Embodiment 3

[0045] A graphene paper with an adjustable porous structure is prepared from a graphene gel precursor through a series of post-processing steps.

[0046] A controllable porous structure graphene paper, the preparation method comprising the steps of:

[0047] (1) Graphene oxide was obtained by oxidizing graphite powder through the improved Hummers method;

[0048] (2) Add graphene oxide into 80% ethanol solution, and ultrasonically disperse to obtain 2 mg / mL graphene oxide solution;

[0049] (3) Seal the graphene oxide solution into a closed reactor and keep it at 120°C for 16 hours to obtain a graphene hydrogel, soak the hydrogel in 10% ethanol aqueous dialysate and dialyze for 12 hours;

[0050] (4) After the sample hydrogel was compacted at 18MPa, it was frozen at -20°C and then thawed. Five freeze-thaw cycles followed by drying by supercritical drying yielded graphene paper.

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PUM

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Abstract

The invention discloses graphene paper with an adjustable porous structure. The graphene paper is prepared from a graphene gel precursor. The graphene paper has a porous structure, so that the graphene paper has excellent flexibility and huge specific surface area, and has huge potential in the field of flexible electronic devices; meanwhile, due to the porous structure, the material is very easyto compound with some functional materials, and has a wide application prospect in the fields of environmental protection, catalysis, semiconductors, flexible electronic devices, biomedical materialsand the like. The porous structure of the graphene paper can be regulated and controlled by adjusting preparation conditions, and the graphene paper can adapt to different application occasions.

Description

technical field [0001] The invention relates to a novel graphene controllable porous structure membrane material and a preparation method thereof, in particular to a controllable porous structure graphene paper and a preparation method thereof. Background technique [0002] Since the advent of graphene, it has attracted widespread attention and research boom because of its unique two-dimensional material structure and a series of excellent properties. On the one hand, graphene itself has many excellent properties, which can be applied in semiconductors, energy storage devices, adsorption materials, thermal conductivity materials, conductive materials and other fields; Whether additives or material substrates, there is huge potential to be tapped. [0003] Among the macroscopic material forms of graphene, film material is an extremely important form, and the commonly used preparation methods include scraping film method, spin coating method, spray coating method and dip coat...

Claims

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Application Information

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IPC IPC(8): C01B32/184C01B32/194
CPCC01B32/184C01B32/194
Inventor 石帅旗葛省波姜帅成
Owner 安徽聚科生物科技有限公司
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