Method for preparing active porous graphene

A porous graphene and active technology, applied in the field of graphene, can solve the problems of poor electrical conductivity and unsatisfactory dispersion effect of graphene, and achieve the effect of good electrical conductivity, low cost, and thin sheets

Active Publication Date: 2014-10-29
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the graphene prepared by the prior art has poor electrical conductivity, and the dispersion effect is not ideal

Method used

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  • Method for preparing active porous graphene
  • Method for preparing active porous graphene
  • Method for preparing active porous graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] At 90° C., hydrolyzing corncobs in sulfuric acid for 10 minutes to obtain lignocellulose, the mass of the sulfuric acid being 3% of the mass of the corncobs;

[0051] At 70°C, the lignocellulose was subjected to acidic sulfite treatment for 1 hour to obtain porous cellulose, the pH value in the acidic sulfite treatment process was 1, the acid was sulfuric acid, and sulfite It is magnesium sulfite, the quality of the sulfuric acid is 4% of the quality of the lignocellulose, and the liquid-solid ratio is 2:1.

Embodiment 2

[0053] At 180°C, hydrolyzing corncobs in nitric acid for 10 hours to obtain lignocellulose, the mass of the nitric acid being 20% ​​of the mass of the corncobs;

[0054] At 180°C, the lignocellulose was subjected to acidic sulfite treatment for 6 hours to obtain porous cellulose, the pH value during the acidic sulfite treatment process was 7, the acid was sulfuric acid, and sulfite It is sodium sulfite, the quality of the sulfuric acid is 30% of the quality of the lignocellulose, and the liquid-solid ratio is 20:1.

[0055] The porous cellulose is bleached with hydrogen peroxide, the mass of the hydrogen peroxide is 5% of the mass of the porous cellulose, the bleaching temperature of the hydrogen peroxide bleach is 100° C., and the bleaching time is 5 hours.

Embodiment 3

[0057] At 130° C., hydrolyzing corncobs in hydrochloric acid for 5 hours to obtain lignocellulose, the mass of the hydrochloric acid being 10% of the mass of the corncobs;

[0058] At 120°C, the lignocellulose was subjected to acidic sulfite treatment for 4 hours to obtain porous cellulose, the pH value in the acidic sulfite treatment process was 3, the acid was sulfuric acid, sulfite It is ammonium sulfite, the quality of the sulfuric acid is 18% of the quality of the lignocellulose, and the liquid-solid ratio is 10:1.

[0059] The porous cellulose is bleached with hydrogen peroxide, the mass of the hydrogen peroxide is 5% of the mass of the porous cellulose, the bleaching temperature of the hydrogen peroxide bleach is 100° C., and the bleaching time is 5 hours.

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Abstract

The invention provides a method for preparing active porous graphene. The method comprises the following steps: 1) bleaching cellulose by use of hydrogen peroxide to obtain a first intermediate product; 2) activating the first intermediate product by use of an activating agent to obtain a second intermediate product; 3) performing carbonization treatment on the second intermediate product at 600-1100 DEG C to obtain the active porous graphene. The invention aims to provide a method for preparing active porous graphene, and the active porous graphene prepared from the method provided by the invention has better conductivity and has better dispersity.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a preparation method of active porous graphene. Background technique [0002] Graphene is a material with a single-layer sheet structure composed of carbon atoms. Graphene is almost completely transparent, absorbing only 2.3% of light; the thermal conductivity is as high as 5300W / m K, higher than that of carbon nanotubes and diamonds; the electron mobility of graphene at room temperature exceeds 15000cm 2 / V s, more than carbon nanotubes or silicon crystals; the resistivity of graphene is only 10 -8 Ω·m, lower than copper or silver, is the material with the smallest resistivity in the world. Because graphene has the advantages of good transparency, low resistivity, and fast electron migration, it can be used to manufacture transparent touch screens, light panels, and solar cells. [0003] At present, the preparation methods of graphene mainly include mechanical exfoliation me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 唐一林张金柱郑应福刘晓敏刘顶
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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