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Method for preparing graphene by using disposable paper tableware as raw material

A one-time, graphene technology, applied in the direction of graphene, nano-carbon, etc., can solve the problems of low yield, reduced ozone, low electrical conductivity, etc., to achieve the effects of high yield, easy implementation and low cost

Active Publication Date: 2014-05-28
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of graphene from graphite as a carbon source has the advantage of high yield, but it also has the problems of low purity and low conductivity.
The method of preparing graphene by chemical vapor deposition using gas or solid organic molecules as a carbon source has a low yield, and the hydrogen and free radicals released in this process will react with ozone in the atmosphere, reduce the amount of ozone, and damage the environment

Method used

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  • Method for preparing graphene by using disposable paper tableware as raw material
  • Method for preparing graphene by using disposable paper tableware as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Crush a 5g disposable paper cup into small pieces and put it into a 1000ml glass beaker, add 300ml of 1 mol / L sodium hydroxide solution, and keep stirring for 48 hours to prepare pulp;

[0022] 2) Filter the pulp to obtain insoluble solids, then add 300 ml of deionized water to wash the insoluble solids, then transfer the aqueous dispersion of the insoluble solids to a centrifuge tube, centrifuge at 3000 rpm for 30 min, dump After centrifuging the liquid in the tube, transfer the solid to a beaker and then add deionized water to wash it, and then go through a cycle of water washing / centrifugation for several times until the pH value is neutral to obtain sodium ion-doped pulp.

[0023] 3) Disperse the pulp obtained in step 2) into 100 ml of 1 mol / L ferric nitrate solution, keep stirring for 12 h under the protection of nitrogen, and then dry the solution in an oven at 60 °C for 48 h to obtain iron salt-loaded pulp.

[0024] 4) Put the dried iron salt-loaded pulp into...

Embodiment 2

[0027] 1) Crush a 13g disposable paper bowl into small pieces and put it into a 1000ml glass beaker, add 450ml of 1 mol / L potassium hydroxide solution, and keep stirring for 60h to prepare pulp;

[0028] 2) Filter the pulp to obtain insoluble solids, then add 450ml of deionized water to wash the insoluble solids, then transfer the aqueous dispersion of insoluble solids to a centrifuge tube, centrifuge at 4000 rpm for 20 minutes, and dump the centrifuge tube After removing the liquid in the solution, transfer the solid to a beaker and then add deionized water to wash it, so that it undergoes a cycle of water washing / centrifugation for several times until the pH value is neutral, and the pulp doped with potassium ions is obtained.

[0029] 3) Disperse the pulp obtained in step 2) into 150ml of 1 mol / L ferric chloride solution, keep stirring for 18h under the protection of nitrogen, and then dry the solution in an oven at 75°C for 42h to obtain pulp loaded with iron salts .

[0...

Embodiment 3

[0033] 1) Crush a 20g disposable paper disk into small pieces and put it into a 1000ml glass beaker, add 600ml of 1 mol / L potassium hydroxide solution, and keep stirring for 72h to prepare pulp;

[0034] 2) Filter the pulp to obtain insoluble solids, then add 600ml of deionized water to wash the insoluble solids, then transfer the aqueous dispersion of insoluble solids to a centrifuge tube, centrifuge at 5000 rpm for 10 minutes, and dump the centrifuge tube After removing the liquid in the solution, transfer the solid to a beaker and then add deionized water to wash it, so that it undergoes a cycle of water washing / centrifugation for several times until the pH value is neutral, and the pulp doped with potassium ions is obtained.

[0035] 3) Disperse the pulp obtained in step 2) into 200 ml of 1 mol / L ferric sulfate solution, stir continuously for 24 h under nitrogen protection, and then dry the solution in an oven at 90°C for 36 h to obtain iron salt-loaded pulp.

[0036] 4) ...

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Abstract

The invention discloses a method for preparing graphene by using disposable paper tableware as a raw material. The method comprises main steps of firstly preparing the disposable paper tableware into paper pulp doped with alkali metal ion, preparing ferric salt-loaded paper pulp through ion exchange, thermally treating the ferric salt-loaded paper pulp at a high temperature, purifying the carbonized product, so as to obtain the graphene. The method is simple and convenient, and the prepared graphene has good quality and considerable yield.

Description

Technical field [0001] The invention involves the field of carbon material production technology, which is specifically a method for preparing graphene with disposable paper tableware as raw materials. Background technique [0002] Disposable paper tableware (such as paper cups, paper bowls, paper plates, etc.) is a type of convenient portable and low -cost paper container. It is thrown away after use.Commonly drinking water and catering tools.Disposable paper tableware brings convenience to people's lives and causes a lot of white pollution.According to statistics, at least 10 billion copies of disposable paper tableware in China are discarded at will each year.The inner layers of disposable paper tablets usually contain polyethylene gonorrhea. Difficulty in the separation of gonorrhea and paper makes it impossible to recycle both of them. Therefore, most disposable paper tablets are burned directly as garbage.Reasonable handling disposable paper tableware enables waste resource...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/184
Inventor 张新荔吴义强
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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