Method for preparing graphene from lignin

A technology of lignin and graphene, applied in the direction of graphene, nano-carbon, etc., to achieve the effect of simple equipment and low price

Inactive Publication Date: 2013-12-25
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a method for preparing graphene using lignin as a raw material. Starting from the problem of high-value utilization of biomass resources, graphene is prepared by simple heat treatment of lignin, which is conducive to comprehensive solution Significant issues of lignin resource utilization and graphene application needs

Method used

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  • Method for preparing graphene from lignin
  • Method for preparing graphene from lignin
  • Method for preparing graphene from lignin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] At room temperature, nickel powder and alkali lignin with a mass ratio of 1:8 were evenly mixed, and then transferred to a porcelain sample boat. Then put the porcelain sample boat into the hinged tube furnace, open the nitrogen valve and feed nitrogen gas at a flow rate of 500ml / min. After 30min, heat the sample to 1500°C at a heating rate of 30°C / min, and keep it at this temperature Keep it for 30 minutes; turn off the heating switch, and when the temperature of the sample drops to around room temperature, take out the sample, wash with deionized water, dilute nitric acid, deionized water, vacuum filter, and dry at low temperature to obtain graphene.

Embodiment 2

[0025] At room temperature, ferric citrate and lignosulfonate with a mass ratio of 1:3 were mixed evenly, and then transferred to a porcelain sample boat. Then put the porcelain sample boat into the hinged tube furnace, open the argon gas valve and feed argon gas at a flow rate of 2000ml / min. After 5min, the sample was heated to 500°C at a heating rate of 5°C / min. Keep at temperature for 120 minutes; turn off the heating switch, and when the temperature of the sample drops to around room temperature, take the sample out, wash with deionized water, vacuum filter, and dry at low temperature to obtain graphene.

Embodiment 3

[0027] At room temperature, nickel acetate and solvent-based lignin with a mass ratio of 1:5 were evenly mixed, and then transferred to a porcelain sample boat. Then put the porcelain sample boat into the hinged tube furnace, open the nitrogen valve and feed nitrogen gas at a flow rate of 1000ml / min. After 20min, heat the sample to 1200°C at a heating rate of 20°C / min, and hold at this temperature Keep it for 45 minutes; turn off the heating switch, and when the temperature of the sample drops to around room temperature, take out the sample, wash with deionized water, vacuum filter, and dry at low temperature to obtain graphene.

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Abstract

The invention discloses a method for preparing graphene from lignin, which comprises the following steps: putting a porcelain sample boat filled with lignin and a catalyst into a hinge pipe furnace, introducing shielding gas at uniform speed while heating the sample in the furnace from room temperature to the target temperature at a constant heating speed, and keeping at the target temperature; and after the sample is cooled to room temperature, taking out the sample, washing with deionized water, carrying out vacuum filtration, and drying at low temperature to obtain the graphene. The preparation technique is simple and convenient; and the obtained graphene has the advantages of high quality and considerable yield.

Description

technical field [0001] The invention relates to the technical field of carbon material production technology, in particular to a method for preparing graphene by using lignin as a raw material. Background technique [0002] Lignin is a natural renewable resource with many excellent properties and has a very high potential application value in the modern chemical industry. Its output is huge, but its application is extremely low. As a by-product of the pulp and paper industry, most industrial lignin is often directly incinerated, which pollutes the environment and wastes resources. Promoting and accelerating the high-value application of lignin is an urgent problem in the current society. Lignin contains about 65% carbon and has great potential in the preparation of carbon materials. [0003] Graphene is a two-dimensional advanced carbon material that has become a research boom in recent years. It is only one carbon atom thick and is currently the thinnest and hardest nanom...

Claims

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Application Information

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