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Electrolytic reduction method for preparing graphene

A technology of graphene and reduction method, applied in the direction of electrolysis process, electrolysis components, etc., can solve problems such as safety and pollution, achieve high quality, ensure the effect of electrolysis, and the effect of simple and easy preparation method

Inactive Publication Date: 2018-05-18
蒋黎婷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems in the prior art, the present invention provides an electrolytic reduction method for preparing graphene, which solves the problems of pollution and safety in the existing electrolytic reduction method for preparing graphene. The preparation method is simple and easy, and can not only ensure that graphite The high quality of olefin, and the preparation method is environmentally friendly and pollution-free

Method used

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  • Electrolytic reduction method for preparing graphene
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Embodiment 1

[0034] An electrolytic reduction method for preparing graphene, said electrolytic reduction method follows the steps:

[0035] Step 1, putting the graphene oxide particles into distilled water, adding a dispersant for ultrasonic dispersion, to obtain a graphene oxide dispersion;

[0036] Step 2, adding the graphene dispersion liquid into the sealed reaction kettle for microwave pressurization reaction for 3 hours, and obtaining the fine particle graphene dispersion liquid after rapid pressure release;

[0037] Step 3, adding sodium chloride to the fine-grained graphene dispersion, adding methanol and stirring evenly, and electrolytically reacting for 5 hours to obtain the graphene dispersion;

[0038] Step 4, ultrasonically disperse the graphene dispersion for 1 hour, then seal and pressurize for 1 hour, and quickly release the pressure to obtain graphene mixed precipitation;

[0039] Step 5, putting the graphene mixed precipitate into absolute ethanol for ultrasonic reaction...

Embodiment 2

[0050] An electrolytic reduction method for preparing graphene, said electrolytic reduction method follows the steps:

[0051] Step 1, putting the graphene oxide particles into distilled water, adding a dispersant for ultrasonic dispersion, to obtain a graphene oxide dispersion;

[0052] Step 2, adding the graphene dispersion liquid into the sealed reaction kettle for microwave pressurization reaction for 5 hours, and obtaining the fine particle graphene dispersion liquid after rapid pressure release;

[0053] Step 3, adding sodium chloride to the fine-grained graphene dispersion, adding methanol and stirring evenly, and then electrolytically reacting for 8 hours to obtain the graphene dispersion;

[0054] Step 4, ultrasonically disperse the graphene dispersion for 3 hours, then seal and pressurize for 3 hours, and quickly release the pressure to obtain graphene mixed precipitation;

[0055] Step 5, putting the graphene mixed precipitate into absolute ethanol for 3 hours of u...

Embodiment 3

[0066] An electrolytic reduction method for preparing graphene, said electrolytic reduction method follows the steps:

[0067] Step 1, putting the graphene oxide particles into distilled water, adding a dispersant for ultrasonic dispersion, to obtain a graphene oxide dispersion;

[0068] Step 2, adding the graphene dispersion liquid into the sealed reaction kettle for microwave pressurization reaction for 4 hours, and obtaining the fine particle graphene dispersion liquid after rapid pressure release;

[0069] Step 3, adding sodium chloride to the fine-grained graphene dispersion, adding methanol and stirring evenly, and electrolytically reacting for 7 hours to obtain the graphene dispersion;

[0070] Step 4, ultrasonically disperse the graphene dispersion for 2 hours, then seal and pressurize for 2 hours, and quickly release the pressure to obtain graphene mixed precipitation;

[0071] Step 5, put the mixed precipitate of graphene into absolute ethanol for ultrasonic reactio...

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Abstract

The invention belongs to preparation methods of graphene and particularly relates to an electrolytic reduction method for preparing graphene. The electrolytic reduction method comprises the followingsteps: step 1, putting graphene oxide granules into distilled water, adding a dispersing agent, and performing ultrasonic dispersion to obtain graphene oxide dispersion liquid; step 2, adding the graphene dispersion liquid to a sealed reactor, performing microwave pressurization reaction for 3-5h, and performing quick pressure relief to obtain finely-granular graphene dispersion liquid; step 3, adding sodium chloride to the finely-granular graphene dispersion liquid, adding methanol, performing uniform stirring, and then, performing electrolytic reaction for 5-8h to obtain graphene dispersionliquid; step 4, performing ultrasonic dispersion on the graphene dispersion liquid for 1-3h, then performing sealed pressurization reaction for 1-3h, and performing quick pressure relief to obtain graphene mixed precipitation; and step 5, putting the graphene mixed precipitation in absolute ethanol, performing ultrasonic reaction for 1-3h, performing filtration, and then, performing drying to obtain a graphene material. The electrolytic reduction method provided by the invention solves the problems of pollution and safety existing in an existing electrolytic reduction method for preparing graphene, and the preparation method is simple, easy, environmentally friendly and pollution-free.

Description

technical field [0001] The invention belongs to a method for preparing graphene, in particular to an electrolytic reduction method for preparing graphene. Background technique [0002] Since high-quality graphene was obtained by micromechanical exfoliation, the unique electrical and thermal conductivity and mechanical properties of graphene have attracted great interest from the scientific research community and the industry. Due to its excellent properties, the market demand for graphene is also increasing, which requires the continuous improvement of the preparation of graphene materials and the realization of green and pollution-free preparation technologies to obtain high-quality graphene in large quantities. However, the current preparation still faces great challenges in industrial application. First of all, the chemical vapor deposition technology and epitaxial growth method that can obtain high-quality graphene have problems such as low yield, high energy consumptio...

Claims

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Application Information

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IPC IPC(8): C25B1/00
CPCC25B1/00
Inventor 蒋黎婷
Owner 蒋黎婷