Porous graphene with stratified columnar support structure and its preparation method

A porous graphene and support structure technology, applied in the field of material science, can solve the problems of insufficient utilization of specific surface area and easy agglomeration, and achieve the effects of easy industrial production, high specific surface area and simple preparation method

Inactive Publication Date: 2012-06-27
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high van der Waals force between graphene sheets, it is easy to agglomerate during the preparation process, resulting in the inability to fully utilize the specific surface area.
Porous graphene is to manufacture some nanometer-sized holes in the graphene sheet by physical or chemical methods. This structure

Method used

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  • Porous graphene with stratified columnar support structure and its preparation method
  • Porous graphene with stratified columnar support structure and its preparation method
  • Porous graphene with stratified columnar support structure and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0022] The lamellar porous MgO with a thickness of 2nm and a pore diameter of 2nm was uniformly mixed with polyethylene and toluene at a weight ratio of 1:10:100, vacuumed to remove the solvent, and then placed in an inert atmosphere of nitrogen for heat treatment at 600°C for 300min. After cooling , collect the solid, place it in dilute hydrochloric acid and wash it fully, filter it and wash it with water until it becomes neutral, and dry it to obtain the interlayer columnar porous graphene material.

Embodiment 2

[0024] The lamellar porous MgO with a thickness of 10nm and a pore diameter of 5nm was uniformly mixed with pitch and tetrahydrofuran at a weight ratio of 1:5:50, vacuumed to remove the solvent, and then placed in an inert atmosphere of nitrogen for heat treatment at 700°C for 200min. After cooling, The solid was collected, washed fully in dilute hydrochloric acid, filtered and washed until neutral, and dried to obtain a porous graphene material with interlayer columnar shape.

Embodiment 3

[0026] The layered porous MgO with a thickness of 4nm and a pore diameter of 2nm was uniformly mixed with glucose and N,N-2 methylformamide at a weight ratio of 1:20:500, vacuumed to remove the solvent, and then placed in an inert atmosphere of nitrogen Heat treatment at 800°C for 60 minutes, after cooling, collect the solid, wash fully in dilute hydrochloric acid, filter and wash until neutral, and dry to obtain the interlayer columnar porous graphene material.

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Abstract

The invention provides porous graphene with a stratified columnar support structure and its preparation method. The method comprises: (1) adding a porous metal oxide inorganic template with a lamellar structure and a precursor of carbon into an organic solvent able to dissolve the carbon precursor; (2) heating and vacuum pumping the product of step (1) so as to remove the solvent; (3) subjecting the product of step (2) to heat treatment in an inert atmosphere for 30-400min at a temperature of 500-1000DEG C; then collecting the solid product after cooling; (4) treating the solid product with a dilute acid for removing the metal oxide template, thus obtaining a porous graphene material. The porous graphene material with a stratified columnar support structure prepared by the preparation method of the invention not only has holes with a diameter larger than 2nm distributed in the graphene lamellar layer, but also has columnar supports between graphene lamellas. Able to reduce the mass transfer resistance between graphene lamellas, the porous graphene in the invention boasts wide application prospects in the fields of energy storage, hydrogen storage, catalysis, and environmental protection, etc.

Description

technical field [0001] The invention relates to nanometer materials, and the invention also relates to a preparation method of nanometer materials, belonging to the field of material science. In particular, it relates to a porous graphene with a layered columnar support structure and a preparation method thereof. Background technique [0002] Graphene material is a nano-scale graphite material composed of single-layer graphite. Due to its excellent electrical conductivity, thermal conductivity and mechanical properties, it has great potential application value in the fields of nano-devices, heat conduction, electrical conduction and energy storage. The theoretical specific surface area is as high as 2600m 2 / g, with outstanding thermal conductivity (3000W / (m K)) and mechanical properties (1060GPa), as well as high-speed electron mobility at room temperature [15000cm 2 / (V·s)]. However, due to the high van der Waals force between graphene sheets, it is easy to agglomerate ...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y40/00B82Y30/00C01B32/184
Inventor 范壮军魏彤闫俊刘洋
Owner HARBIN ENG UNIV
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