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Large-scale synthesis method of two-dimensional graphene-like carbon material by using sodium citrate

A technology of sodium citrate and graphene, which is applied in the field of synthesis of two-dimensional graphene-like carbon materials, can solve the problems of difficulty in large-scale production, complicated operation process, and high cost, and achieve large-scale industrial production and short reaction cycle Short, easy-to-manipulate effects

Inactive Publication Date: 2015-12-16
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this invention patent only uses sodium citrate as a reducing agent, and its essence is to prepare graphene by reducing graphite oxide. The operation process is complicated and costly, and it is difficult to achieve large-scale production

Method used

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  • Large-scale synthesis method of two-dimensional graphene-like carbon material by using sodium citrate
  • Large-scale synthesis method of two-dimensional graphene-like carbon material by using sodium citrate
  • Large-scale synthesis method of two-dimensional graphene-like carbon material by using sodium citrate

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[0031] The invention provides a method for synthesizing a two-dimensional graphene-like carbon material that is environmentally friendly, low in price, short in reaction cycle, easy to operate, and less demanding on reaction conditions. The technological process of the synthetic method of this two-dimensional graphene-like carbon material is as follows figure 1 As shown, it specifically includes the following steps:

[0032] S1: Weigh a certain mass ratio of sodium citrate, graphitization catalyst and nitrogen dopant as raw materials, mix and fully grind;

[0033] S2: carbonizing the ground raw material in an oxygen-free environment to obtain a crude product of a two-dimensional graphene-like carbon material;

[0034] S3: purifying the crude product of the two-dimensional graphene-like carbon material to obtain a two-dimensional graphene-like carbon material sample;

[0035] S4: drying the sample to obtain a two-dimensional graphene-like carbon material.

[0036] By changin...

Embodiment 1

[0046] S1: Weigh 1.0 g of sodium citrate and grind it thoroughly.

[0047] S2: Transfer the ground sodium citrate to the porcelain boat of the horizontal tube furnace, pass inert gas for 30 minutes to make the horizontal tube furnace an oxygen-free environment, and then continue to heat the mixture at 4°C min under the inert atmosphere. –1 The heating rate is heated to 600 ° C, and the temperature is kept in an inert gas flow for 1 hour, and then taken out to obtain a crude product of a two-dimensional amorphous carbon material;

[0048] S3: immersing the crude two-dimensional amorphous carbon material in acid to remove impurities. Then filter with suction and rinse with deionized water until neutral.

[0049] S4: heat the sample to 110° C. in a vacuum drying oven and keep it for 12 hours to obtain a two-dimensional amorphous carbon material.

[0050] figure 2 It is a scanning electron micrograph of the sample obtained in this embodiment, and it can be seen from the figure...

Embodiment 2

[0054] S1: Weigh 1.0 g of sodium citrate and 1.0 g of melamine, mix and grind thoroughly.

[0055] S2: Transfer the ground mixture to the porcelain boat of the horizontal tube furnace, pass inert gas for 30 minutes to make the horizontal tube furnace an oxygen-free environment, and then continue to heat at 4°C min under the inert atmosphere. –1 The heating rate was heated to 1000 ° C, and then kept in an inert gas flow for 4 hours and then taken out to obtain a crude product of a two-dimensional amorphous nitrogen-doped carbon material.

[0056] S3: immersing the crude product of the obtained two-dimensional amorphous nitrogen-doped carbon material in acid to remove impurities. Then filter with suction and rinse with deionized water until neutral.

[0057] S4: Heat the sample to 110° C. in a vacuum drying oven and keep it for 12 hours to obtain a two-dimensional amorphous nitrogen-doped carbon material.

[0058] Figure 5 It is a scanning electron microscope image of the sa...

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Abstract

The invention relates to a large-scale synthesis method of a two-dimensional graphene-like carbon material by using sodium citrate, which comprises the following step: in an oxygen-free environment, by using sodium citrate as a carbon source, respectively synthesizing an amorphous carbon material, a nitrogen-doped amorphous carbon material, a graphene-like carbon material and a nitrogen-doped graphene-like carbon material by regulating the mass ratio of the sodium citrate, graphitization catalyst and nitrogen dopant. The high-quality graphene-like carbon material is obtained at lower temperature under atmospheric pressure, thereby solving the technical problem of mass controllable production of the graphene-like-structure carbon material to some extent, and having wide application prospects.

Description

technical field [0001] The invention relates to the technical field of synthesis of two-dimensional graphene-like carbon materials, in particular to a large-scale synthesis of two-dimensional amorphous carbon materials, nitrogen-doped amorphous carbon materials, graphene-like carbon materials, nitrogen-doped A method for heterogeneous graphene carbon materials. Background technique [0002] Graphene is a new material with a thickness of one atomic layer and a two-dimensional crystal structure. In graphene, the carbon atoms are connected by s bonds, and the bonding method is sp 2 Hybridization, these s-bonds endow graphene with high mechanical strength and good chemical stability. In addition, each carbon atom has a p-electron that is not bonded and can move freely in the crystal, which makes graphene have excellent electrical conductivity. Graphene and graphene-like have a wide range of applications in capacitors, energy storage, sensors, catalysis and other fields due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B31/02
Inventor 陈祥迎王倩聂永福
Owner HEFEI UNIV OF TECH
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