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Porous graphene and preparation method thereof

A technology of porous graphene and porous carbon, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of low yield, difficult to control the number of graphene layers, and high production cost, and achieve high yield and low realization. Cost-effective mass production and low cost

Inactive Publication Date: 2017-04-26
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above two methods use graphite as raw material, and obtain graphene by exfoliating graphite sheets by physical and chemical means, which has the advantages of low raw material cost and easy mass production, but there is also the problem that the number of graphene layers is difficult to control
[0005] It can be seen from the above that although the batch preparation of graphite can be realized by chemical vapor deposition, the yield is low and the production cost is high.

Method used

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  • Porous graphene and preparation method thereof

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Embodiment 1

[0052] The present embodiment provides a kind of preparation method of porous graphene, it comprises the following steps:

[0053] 1) Weigh 10g of oil slurry, heat it to liquid state (60-90°C), add 20g of flake magnesium oxide, stir evenly, put it into a horizontal tube furnace, and then pass argon (Ar) into the furnace, while the horizontal furnace Raise the temperature to 500°C at a heating rate of 15°C / min, and keep it for 60min. After the furnace temperature is naturally cooled to room temperature, take out the gray product; It is obtained by mixing 1:3, wherein the mass percent concentration of concentrated hydrochloric acid is 37%), boiled and refluxed for pickling for 1 hour, and finally washed with deionized water until neutral and dried at 80°C to obtain a porous carbon material, No. for PC500.

[0054] figure 1 Middle a and b are the low-magnification and high-magnification TEM images of the porous carbon material prepared at 500 °C, respectively. It can be seen f...

Embodiment 2

[0058] The present embodiment provides a kind of preparation method of porous graphene, it comprises the following steps:

[0059] 1) Weigh 10g of oil slurry, heat it to liquid state (60-90°C), add 20g of flake magnesium oxide, stir evenly, put it into a horizontal tube furnace, and then pass argon (Ar) into the furnace, while the horizontal furnace Raise the temperature to 900°C at a heating rate of 15°C / min, and keep it for 60min. After the furnace temperature is naturally cooled to room temperature, take out the gray product; It is obtained by mixing 1:3, wherein the mass percent concentration of concentrated hydrochloric acid is 37%), boiled and refluxed for pickling for 1 hour, and finally washed with deionized water until neutral and dried at 80°C to obtain a porous carbon material, No. for PC900.

[0060] image 3 Middle a and b are the low-magnification and high-magnification TEM images of the porous carbon material prepared at 900 °C, respectively. It can be seen f...

Embodiment 3

[0068] The present embodiment provides a kind of preparation method of sulfur-doped porous graphene, it comprises the following steps:

[0069] Weigh 10g of oil slurry, heat it to liquid state (60-90°C), add 20g of magnesium sulfate whiskers, stir evenly, put it into a horizontal tube furnace, then pass Ar into the furnace, and at the same time, the horizontal furnace heats up at 15°C / min The rate was increased to 600°C and maintained for 60 minutes, and the gray product was taken out after the furnace was naturally cooled to room temperature. The product was placed in excess dilute hydrochloric acid, boiled and refluxed for pickling for 1 h, and finally washed with deionized water until neutral and dried at 80°C to obtain sulfur-doped porous carbon; the magnesium sulfate whiskers can be referred to MA , X; NING, G; QI, C; GAO, J, One-step synthesis of basic magnesium sulfate whiskers by atmospheric pressure reflux. Particuology 2016,24,191-196 in the preparation method;

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Abstract

The invention provides porous graphene and a preparation method thereof. The method comprises the following steps: I, mixing a carbon source and a flask template agent so as to obtain a carbon source-template agent composite, wherein in the carbon source-template agent composite, the carbon source covers the surface of the flask template agent; II, carbonizing the carbon source-template agent in the atmosphere of protective gas at 500-900 DEG C, and pickling and purifying a carbonized product so as to obtain flask porous carbon; and III, calcining the flask porous carbon in the atmosphere of protective gas at 1000-2000 DEG C, so that the porous graphene is obtained. According to the technical scheme provided by the invention, cheap raw materials are adopted, and the porous graphene is prepared in a large scale by virtue of heat treatment; and the method is simple to operate, low in cost and high in yield.

Description

technical field [0001] The invention relates to a porous graphene and a preparation method thereof, and belongs to the technical field of novel porous graphene preparation. Background technique [0002] As a new type of carbon material, graphene has become a research hotspot since it was discovered by Geim et al. in 2004 (Science 2004; 306(5696):666-9). Graphene is a two-dimensional crystalline material composed of a single layer of carbon atoms, and is the basic unit for constructing other dimensional carbon materials. The special structure of graphene endows it with excellent electrical, thermal and mechanical properties, making graphene have broad application prospects in many fields such as nanoelectronic devices, supercapacitors, sensors, energy storage, transparent electrodes and catalyst supports. [0003] In order to realize the practical application of graphene, large-scale and reproducible preparation of high-quality graphene materials is required. At present, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184
CPCC01B2204/04C01B2204/22C01B2204/32C01P2004/04C01P2006/14C01P2006/16
Inventor 宁国庆李永峰孙玉珍王庭富
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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