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Preparation method of three-dimensional porous graphene material

A three-dimensional porous and graphene technology, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve problems that do not conform to the development direction of modern green chemical industry, and achieve the effect of excellent electrochemical energy storage performance

Active Publication Date: 2018-06-01
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, strong acid and strong alkali will inevitably bring about environmental problems, which are not in line with the development direction of modern green chemical industry

Method used

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  • Preparation method of three-dimensional porous graphene material
  • Preparation method of three-dimensional porous graphene material
  • Preparation method of three-dimensional porous graphene material

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Take 10 grams (g) of polycarbonate, 10 g of sodium bicarbonate and 8 milliliters (ml) of deionized water and stir together to form a homogeneous mixture. Then transfer the uniformly mixed material into a PTFE reactor (with a stainless steel jacket outside), put the reactor into an oven, heat up to 160 ° C, and then keep the temperature for 5 hours (h), after cooling to room temperature with the furnace temperature, put It was taken out and dried in an oven, then put into a porcelain crucible and heated up to 700°C at a rate of 5°C per minute (°C / min) in a vacuum atmosphere furnace, kept at a constant temperature for 5 hours, cooled naturally with the furnace temperature, and then taken out. The reaction product was washed with deionized water until the pH value of the filtrate was 7, and then dried in a vacuum oven at 65 degrees Celsius (°C) for 12 hours to obtain a specific surface area of ​​1150 m 2 / g of 3D porous graphene-like materials. The prepared material is us...

Embodiment 2

[0024] Take 15 g of polyethylene terephthalate (PET) and 5 g of polyethylene with 15 g of sodium carbonate and 10 ml of deionized water, and stir together to form a homogeneous mixture. Then transfer the homogeneously mixed material into a PTFE reactor (with a stainless steel jacket outside), put the reactor into an oven, raise the temperature to 180°C, and then keep the temperature for 4 hours. After cooling to room temperature with the furnace temperature, take it out in the oven. dried in an oven, and then placed in a porcelain crucible under nitrogen (N 2 ) in a protective atmosphere furnace, raise the temperature to 800°C at a rate of 6°C / min, keep the temperature constant for 3 hours, and take it out after cooling naturally with the furnace temperature. The reaction product was washed with deionized water until the pH value of the filtrate was 7, and then dried in a freeze-drying device at -40 °C for 12 h to obtain a specific surface area of ​​1100 m 2 / g of 3D porous g...

Embodiment 3

[0026] Take 15 g of polymethyl methacrylate (PMMA) and 10 g of potassium carbonate mixed with 10 g of potassium bicarbonate powder and 10 ml of deionized water, and stir together to form a homogeneous mixture. Then transfer the homogeneously mixed material into a PTFE reactor (with a stainless steel jacket outside), put the reactor into an oven, heat up to 200°C, and then keep the temperature for 3 hours. After cooling to room temperature with the furnace temperature, take it out in the oven. Dry it in an oven, then put it into a porcelain crucible in an argon (Ar) protective atmosphere furnace, raise the temperature to 850°C at a rate of 6°C / min, keep the temperature constant for 2h, and take it out after cooling naturally with the furnace temperature. The reaction product was washed with deionized water until the pH value of the filtrate was 7, and then dried in a vacuum oven at 80 °C for 10 h to obtain a specific surface area of ​​1050 m 2 / g of 3D porous graphene-like mate...

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Abstract

The invention discloses a preparation method of a three-dimensional porous graphene material. The method includes: stirring hot melt resin powder, a template agent and deionized water evenly together,then transferring the mixture into a reaction kettle, conducting a period of treatment at certain temperature, then performing furnace cooling to room temperature, then drying moisture, finally transferring the product into a heating furnace for pyrolysis in vacuum or protective atmosphere environment, washing the pyrolysis product with deionized water to neutral, and performing drying to obtainthe three-dimensional porous graphene material. The obtained three-dimensional porous graphene material has a specific surface area of greater than 800m<2> / g, shows excellent electrochemical energy storage performance in lithium ion battery negative electrode materials, and at the same time the material can be expanded and applied to supercapacitors.

Description

technical field [0001] The invention belongs to the technical field of preparation of porous materials, and in particular relates to a method for preparing a three-dimensional (3D) graphene-like material with a porous structure. Background technique [0002] Carbon materials with a porous structure have a better spatial configuration, and they can be widely used in the fields of energy, environment and catalysis, so the research on this carbon material with a porous structure has become a current research hotspot. At present, carbon materials with porous structure are usually constructed by self-assembly, hydrothermal method or template method using carbon nanotubes, graphene or other types of carbon precursors, which can be directly used as electrodes of batteries or capacitors, or as catalysts. The carrier improves the catalytic performance, and can also be assembled into an adsorption material for harmful substances in the environment. Zishou Zhang, et al. prepared a c...

Claims

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Application Information

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IPC IPC(8): C01B32/184
CPCC01B2204/22C01B2204/32
Inventor 符远翔裴现一男莫冬传吕树申
Owner SUN YAT SEN UNIV
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