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Method for preparing nitrogen-doped graphene and nitrogen-doped graphene

A nitrogen-doped graphene and nitrogen precursor technology is applied in the preparation of nitrogen-doped graphene and in the field of nitrogen-doped graphene, which can solve the problems of high cost, difficult industrial production, complicated technology, etc., and achieves low price and easy availability. , the effect of simple process

Inactive Publication Date: 2013-09-04
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defects of complex technology, high cost and difficulty in industrial production in nitrogen-doped graphene in the prior art, and provide a method for preparing nitrogen-doped graphene with low cost and simple process

Method used

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  • Method for preparing nitrogen-doped graphene and nitrogen-doped graphene
  • Method for preparing nitrogen-doped graphene and nitrogen-doped graphene
  • Method for preparing nitrogen-doped graphene and nitrogen-doped graphene

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preparation example Construction

[0032] see figure 1 , figure 1 The step flowchart 100 of the preparation method of the nitrogen-doped graphene provided by the embodiment of the present invention, from figure 1 Visible in, the preparation method of nitrogen-doped graphene comprises the following steps:

[0033] Step S10: drying the mixture of the carbon-containing precursor and the carbon-nitrogen-containing precursor.

[0034] In this embodiment, the mass of the mixture of the carbon-containing precursor and the carbon-nitrogen-containing precursor is 3 g to 1000 g.

[0035] In this embodiment, the carbon-containing precursor is a carbon-containing sugar molecule, and the carbon-nitrogen-containing precursor is a carbon-nitrogen-containing organic small molecule. Preferably, the carbon-containing sugar molecule is at least one of glucose or sucrose, and the carbon-nitrogen-containing organic small molecule is at least one of melamine, cyanamide, dicyandiamide, urea, diuret, trichloroethylamine ; Preferab...

Embodiment 1

[0047] The steps included in the preparation method of nitrogen-doped graphene provided in Example 1 of the present invention are as follows:

[0048] Put 10g of melamine and 0.5g of glucose into the crucible after mixing evenly, and dry at a suitable temperature; put the dried mixture into a heating furnace, and heat up to 550°C at a rate of 5°C / min. React at high temperature for more than 3 hours until a gray solid is produced; then transfer the above gray solid to a tube furnace, and at the same time pass the protective gas Ar at a rate of 200 sccm, and keep it at 100 ° C for more than 30 min, and then at 10 ° C / min The heating rate was increased to 800°C, and the reaction was carried out at this temperature for 1 hour until a black solid was formed, and cooled in the air environment to obtain nitrogen-doped graphene. The graphene obtained according to the above preparation method has an atomic ratio of carbon / nitrogen of 2.9.

[0049] see figure 2 , image 3 and Fi...

Embodiment 2

[0051] The steps included in the preparation method of nitrogen-doped graphene provided by Example 2 of the present invention are as follows:

[0052] Put 10g of urea and 0.5g of glucose into the crucible after mixing evenly, and dry at a suitable temperature; put the dried mixture into a heating furnace, and heat up to 550°C at a rate of 5°C / min. React at high temperature for more than 3 hours until a gray solid is produced; then transfer the above gray solid to a tube furnace, and at the same time pass the protective gas Ar at a rate of 200 sccm, and keep it at 100 ° C for more than 30 min, and then at 10 ° C / min The heating rate was increased to 800°C, and the reaction was carried out at this temperature for 1 hour until a black solid was formed, and cooled in the air environment to obtain nitrogen-doped graphene. The atomic ratio of carbon / nitrogen in the graphene obtained according to the above preparation method is 3.

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Abstract

The invention discloses a method for preparing nitrogen-doped graphene which comprises the following steps of: drying a mixture of a carbon-containing precursor and a carbon-nitrogen-containing precursor; raising the temperature of the dried mixture to be 450-600 DEG C, and keeping the temperature to generate gray solid; and continuously raising the temperature of the gray solid to be 700-1000 DEG C, introducing protective gas, keeping the temperature to generate black solid, and obtaining the nitrogen-doped graphene. According to the method for preparing nitrogen-doped graphene in the embodiment, the nitrogen-doped graphene is obtained under normal pressure and high temperature through a solid-phase reaction, the whole preparation method is simple in process, the nitrogen-doped graphene can be obtained without complex equipment, and industrial production is easily performed. In addition, the invention also provides nitrogen-doped graphene.

Description

【Technical field】 [0001] The invention relates to the field of graphene materials, in particular to a preparation method of nitrogen-doped graphene and nitrogen-doped graphene. 【Background technique】 [0002] Fuel Cell (Fuel Cell) is recognized as an efficient, convenient and environmentally friendly new green power generation device. The use of renewable fuels such as hydrogen can reduce our country's dependence on imported oil. Fuel cells can be used in numerous end uses such as distributed backup power, combined heat and power systems, automobiles, auxiliary power units, and portable electronics. Fuel cells are poised to greatly impact the clean energy economy in the 21st century. [0003] A fuel cell is an isothermal electrochemical unit that converts chemical energy stored in fuel and oxidant directly into electrical energy. Objectively speaking, although fuel cells have many advantages, they still need to meet three key conditions to commercialize them: performance, ...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/184
Inventor 陈韦张玥薇
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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