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Method for preparing graphene by taking biomass as raw material

A technology of biomass and graphene, applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of difficult industrialization and high cost of graphene, and achieve high repeatability and low capital investment , the effect of mitigating post-processing problems

Inactive Publication Date: 2015-06-24
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the world's first successful method of preparing graphene, the mechanical exfoliation method has been studied by many people. Although high-quality graphene can be prepared, it is difficult to industrialize
The cost of preparing graphene by CVD method is relatively high, and the surface of graphene prepared by intercalation graphite method and redox method will have more defects

Method used

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  • Method for preparing graphene by taking biomass as raw material
  • Method for preparing graphene by taking biomass as raw material
  • Method for preparing graphene by taking biomass as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Collect rose petals, clean them, cut them into small pieces, soak them in hydrogen peroxide solution, and stir them at a constant speed of 50r / min for 2 hours. Then the solution was transferred to a high-speed centrifuge, the rotating speed was set to 5000r / min, and the centrifugation time was 10 minutes. After the end, the broken layer was taken out. Under normal temperature and pressure, put the crushed sample into a cell culture dish with a diameter of 15cm, place it at the air inlet, adjust the flow parameters, set the wind speed to 6m / s, and the air volume to 1200m 3 / h, keep the ventilated state for 12 hours. The temperature of the tube furnace was raised to 900° C., and an inert gas protection was introduced and kept for 30 minutes. The dried broken sample was placed in a tube furnace, heated for 3 hours, and after cooling to room temperature, graphene with obvious exfoliation was obtained.

[0029] TEM picture as figure 1 As shown, it shows that the graphite ...

Embodiment 2

[0031] Collect the lotus petals, clean them, cut them into small pieces, soak them in ethanol solution, and stir them at a constant speed of 100r / min for 2 hours. Then the solution was transferred to a high-speed centrifuge, the rotating speed was set to 4000r / min, and the centrifugation time was 10 minutes. After the end, the broken layer was taken out. Under normal temperature and pressure, put the crushed sample into a cell culture dish with a diameter of 15cm, place it at the air inlet, adjust the flow parameters, set the wind speed to 6m / s, and the air volume to 1500m 3 / h, keep the ventilated state for 12 hours. The temperature of the tube furnace was raised to 1000° C., and an inert gas protection was introduced and kept for 30 minutes. The dried broken sample was placed in a tube furnace, heated for 2 hours, and after cooling to room temperature, graphene with obvious exfoliation was obtained.

[0032] TEM image with figure 1 Similarly, graphite flakes were effectiv...

Embodiment 3

[0034] Collect peach blossom petals, clean them, cut them into small pieces, soak them in hydrogen peroxide solution, and stir them at a constant speed of 60r / min for 3 hours. Then the solution was transferred to a high-speed centrifuge, the rotating speed was set to 3000r / min, and the centrifugation time was 10 minutes. After the end, the broken layer was taken out. Under normal temperature and pressure, put the crushed sample into a cell culture dish with a diameter of 15cm, place it at the air inlet, adjust the flow parameters, set the wind speed to 6m / s, and the air volume to 1600m 3 / h, keep the ventilated state for 12 hours. The temperature of the tube furnace was raised to 1100° C., and an inert gas protection was introduced and kept for 30 minutes. The dried crushed sample was placed in a tube furnace, heated for 1 hour, and cooled to room temperature to obtain graphene with obvious exfoliation.

[0035] TEM image with figure 1 Similarly, graphite flakes were effect...

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Abstract

The invention discloses a method for preparing graphene by taking biomass as a raw material. The method comprises the following steps: dipping the biomass in an organic solvent for 1-5 hours, centrifuging, drying, calcining for 1-24 hours at the temperature of 600-1600 DEG C in the presence of inert gas, and cooling, thus obtaining graphene. The method for preparing the graphene by taking the biomass as the raw material has the advantages that cheap and easily available biomass is taken as the raw material, the problem of aftertreatment of dried-up herbaceous plants is effectively solved, and an effective path is provided for high value-added utilization of the herbaceous plants; a preparation technology in each step is controllable and is high in repeatability, the prepared graphene is obvious in exfoliation, and the minimum lamellar thickness is 3nm only; and the method is simple and environmentally friendly, low in capital investment and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the field of nanomaterial preparation, in particular to a method for preparing graphene from biomass. Background technique [0002] Graphene is a single-layer two-dimensional honeycomb material composed of carbon atoms. It has a large specific surface area, high conductivity, and excellent thermodynamic and electrical properties, so it has become a research hotspot as soon as it came out. Whether it is in the field of life sciences or in the field of energy and power, graphene plays a huge role. Especially in the field of reinforcement and conductivity, graphene is a very useful filler material and is widely used in composite material systems. However, due to the limitation of the preparation method, the surface of the produced graphene often has defects. [0003] At present, the most common graphene preparation methods mainly include the following: mechanical exfoliation method, chemical vapor deposition method (CVD method)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y30/00
Inventor 萨齐博胡人皓张若愚朱锦
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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