Preparation method and application of nitrogen-doped porous carbon nano sheet composite material

A technology of nitrogen-doped porous carbon and composite materials, which is applied in the direction of electrical components, battery electrodes, circuits, etc., can solve the problems of harsh preparation conditions, limited large-scale application of materials, and expensive catalysts, so as to improve battery activity and facilitate Implementation, the effect that is not easy to be

Inactive Publication Date: 2015-01-07
NANKAI UNIV
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Problems solved by technology

However, the catalysts prepared by the above methods are expensive or the raw materials are expensive, or the preparation conditions are harsh, which limits the further large-scale application of their materials

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  • Preparation method and application of nitrogen-doped porous carbon nano sheet composite material
  • Preparation method and application of nitrogen-doped porous carbon nano sheet composite material
  • Preparation method and application of nitrogen-doped porous carbon nano sheet composite material

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Embodiment

[0020] A method for preparing a nitrogen-doped porous carbon nanosheet composite material, the nitrogen-doped porous carbon nanosheet composite material has iron carbide nanoparticles embedded in nitrogen-doped mesoporous carbon nanosheets, and the iron carbide nanoparticles are surrounded by The graphitized carbon layer is coated, and the carbon-coated iron carbide nanoparticles are evenly distributed in the carbon nanosheet composite material. The preparation steps are as follows:

[0021] 1) Dissolve 9 mmol o-phenanthroline in 30 g ethanol, then add 3 mmol ferrous sulfate, stir until ferrous sulfate dissolves, and add 8 g melamine under stirring conditions, continue stirring until uniform gel, and finally put it in 80 ℃ oven-dried for 12 h, and ground into powder to obtain the precursor;

[0022] 2) Put the above-mentioned 3g precursor into a quartz boat, pass inert gas nitrogen into the tube furnace, the nitrogen flow rate is 20mL / mim, raise the temperature to 900°C and ke...

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Abstract

The invention discloses a preparation method of a nitrogen-doped porous carbon nano sheet composite material. The preparation method comprises the steps of performing high-temperature carbonization treatment on a mixture which consists of melamine and adjacent phenanthroline iron and serves as a precursor in a tubular furnace under an inert gas environment, and then removing dissolved iron compounds from an acidic solution to obtain a porous carbon nano sheet layer with carbon-coated iron carbide nano particles. The preparation method has the advantages that the technology is simple, the raw materials are cheap, and operation is easy to implement; in the prepared composite material, iron carbide is uniformly dispersed in the carbon nano sheet layer, so that the composite material is high in specific surface area and pore volume; iron carbide nano particles are completely coated by graphitized carbon, so that oxidization and corrosion are hardly caused; the composite material is stable in acidic electrolyte, and the battery activity can be effectively improved; when used as an electrocatalyst, the composite material is relatively high in electrocatalysis efficiency; the preparation method has an important value and significance in the field of preparation of doped carbon nano composite materials and electrocatalysis of proton membrane fuel batteries.

Description

technical field [0001] The invention relates to the preparation of a composite material, in particular to a preparation method and application of a nitrogen-doped porous carbon nano sheet composite material. Background technique [0002] Carbon-coated metal nanoparticles are a new type of nano-carbon-metal composite materials, which have shown broad application prospects in high-density information storage, catalysis, magnetic materials, and biomedicine, and have attracted great interest. Among them, coating metal nanoparticles with carbon as a shell can effectively protect the stability of metal nanoparticles, such as overcoming their agglomeration, oxidation and corrosion. [0003] There are many methods for preparing carbon-coated nanoparticles, such as arc discharge method, chemical vapor deposition method, pyrolysis method, liquid phase impregnation carbonization method, etc. At present, the preparation methods of carbon-coated metal nanoparticles reported in the lite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/90Y02E60/50
Inventor 陈铁红刘优林
Owner NANKAI UNIV
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