Method for high yield preparation of graphene by using biologic carbon source material

A bio-carbon source and graphene technology, applied in the direction of graphene, nano-carbon, etc., to achieve high yield, low cost, and controllable preparation process

Active Publication Date: 2014-07-23
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Comparing the previous literature, basically in the preparation process of graphene, graphite is mainly used as raw material, and there are relatively few reports on other materials used to prepare graphene.

Method used

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  • Method for high yield preparation of graphene by using biologic carbon source material
  • Method for high yield preparation of graphene by using biologic carbon source material

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Experimental program
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Effect test

Embodiment 1

[0036] Commercially available cellulose (45% carbon content) was microwaved at 300 W for 10 min. The treated samples were immersed in dilute H at a concentration of 1% at room temperature. 2 SO 4 In the aqueous solution, stir at a constant speed of 30 r / min for 5 hours. After the sample is washed with water, it is placed in a fume hood to dry, and the wind speed is set to 3m / s, and the air volume is 800m 3 / h, keep the ventilated state for 12 hours. The dried sample was mixed with 1% platinum-rhodium alloy (platinum content 12%), then transferred to a tube furnace, fed with nitrogen, and kept for 5 minutes. The tube furnace was heated up to 900°C, heated for 6 hours, and after cooling to room temperature, graphene with obvious exfoliation was obtained. TEM results showed that the obtained graphene sheet thickness was about 3nm, the yield of graphene was 18%, and the purity was 94%.

Embodiment 2

[0038] Commercially available cellulose (45% carbon content) was microwaved at 300 W for 10 min. The treated samples were immersed in 3% dilute H at room temperature. 2 SO 4 In the aqueous solution, stir at a constant speed of 30 r / min for 5 hours. After the sample is washed with water, it is placed in a fume hood to dry, and the wind speed is set to 3m / s, and the air volume is 800m 3 / h, keep the ventilated state for 12 hours. The dried sample was mixed with 12% palladium-iron alloy (19% palladium content) and then transferred to a tube furnace, where hydrogen gas was introduced and kept for 5 minutes. The tube furnace was heated to 1600°C, heated for 3 hours, and cooled to room temperature to obtain graphene with obvious exfoliation. TEM results showed that the obtained graphene sheet thickness was about 5nm, the yield of graphene was 21%, and the purity was 91%.

Embodiment 3

[0040] Commercially available cellulose (45% carbon content) was microwaved at 300 W for 30 min. The treated samples were immersed in dilute H at a concentration of 1% at room temperature. 2 SO 4 In the aqueous solution, stir at a constant speed of 30 r / min for 5 hours. After washing the samples, place them in a fume hood to dry, set the wind speed to 3m / s, and the air volume to 1000m 3 / h, keep the ventilated state for 12 hours. The dried sample was mixed with 2% platinum-rhodium alloy (platinum content 10%), then transferred to a tube furnace, fed with water vapor, and kept for 5 minutes. The tube furnace was heated to 600°C, heated for 8 hours, and after cooling to room temperature, graphene with obvious exfoliation was obtained. TEM results showed that the obtained graphene sheet thickness was about 4nm, the yield of graphene was 16%, and the purity was 93%.

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Abstract

The invention discloses a method for the high yield preparation of graphene by using a biologic carbon source material. The method comprises the following steps: carrying out microwave treatment on the biologic carbon source material, adding to an acid solution, dipping for 1-24h, washing with water, and drying to obtain a preprocessed biologic carbon source material; and mixing the preprocessed biologic carbon source material with a catalyst, calcining at 600-1600DEG C in the presence of a protection gas for 1-2h, and cooling to obtain graphene, wherein the catalyst is at least one of platinum, palladium, rhodium and iron. The method for the high yield preparation of graphene by using the biologic carbon source material uses cellulose or lignin as a raw material, so the production cost is greatly reduced, and the large-scale industrial production of graphene is realized; and graphene prepared through the method has a lamellar thickness of 2-5nm, and the yield and the purity of graphene are improved.

Description

technical field [0001] The invention relates to the field of graphene preparation, in particular to a method for preparing graphene with a high yield of biological carbon source materials. 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, chemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/184
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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