Method for preparing nitrogen-doped nano lamellar or Fe2O3 nanoparticle-loaded graphite structure

A nanosheet and graphite structure technology, applied in the field of materials, can solve the problems of low nitrogen content in nitrogen-doped graphene and the microwave absorption effect cannot meet the application needs, and achieve simple equipment, low production cost and high production efficiency Effect

Active Publication Date: 2020-09-11
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nitrogen content of nitrogen-doped graphene obtained by this method is low, which requires subsequent treatment and the absorbing effect cannot meet the application needs.

Method used

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  • Method for preparing nitrogen-doped nano lamellar or Fe2O3 nanoparticle-loaded graphite structure
  • Method for preparing nitrogen-doped nano lamellar or Fe2O3 nanoparticle-loaded graphite structure
  • Method for preparing nitrogen-doped nano lamellar or Fe2O3 nanoparticle-loaded graphite structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Preparation of N-doped nanosheet graphite structure by high temperature plasma arc evaporation technology:

[0041] In the plasma arc discharge evaporation process, the consumed anode target is a high-purity graphite rod with a diameter of 10 mm, and the distance between the graphite cathode and the anode target is 1.5 mm. Vacuum chamber up to 5×10 -3 After Pa, put 30ml of liquid acetonitrile into the vacuum chamber, turn on the DC power supply, adjust the voltage to 18V-24V, plasma arc discharge occurs between the anode target and the cathode, and the arc discharge current is 60A, and the adjustment work during the arc discharge process The current and voltage remain relatively stable, and the arc holding time is 90 minutes. N-doped nano-sheet graphite is prepared in the above atmosphere. After the reaction gas is extracted, the powdered N-doped nano-sheet is collected on the inner wall of the vacuum chamber. Graphite structure.

[0042] figure 1 Provide the X-ray d...

Embodiment 2

[0051] Preparation of surface-supported nano-Fe by high-temperature plasma-arc evaporation technique 2 o 3 Granular N-doped nanosheet graphite structure:

[0052] In the plasma arc discharge evaporation process, the consumed anode target is a cylinder with a diameter of 40mm and a thickness of 10mm formed by high-purity graphite powder (95at.%) and high-purity iron powder (5at.%). The graphite cathode and anode target The material spacing is 1.5mm. Vacuum chamber up to 5×10 -3 After Pa, put 30ml of liquid acetonitrile into the plasma arc discharge cavity, turn on the DC power supply, adjust the voltage to 22V-32V, arc discharge occurs between the anode target and the cathode, and the arc discharge current is 60A, during the arc discharge process Adjust the working current and voltage to keep relatively stable, and the arc holding time is 40 minutes. In the above reaction atmosphere, the surface-loaded nano-Fe 2 o 3 Granular N-doped nanosheet graphite, after the reaction g...

Embodiment 3

[0059] Preparation of surface-supported nano-Fe by high-temperature plasma-arc evaporation technique 2 o 3 Granular N-doped nanosheet graphite structure:

[0060] In the plasma arc discharge evaporation process, the consumed anode target is a cylinder with a diameter of 40mm and a thickness of 10mm formed by high-purity graphite powder (96at.%) and high-purity iron powder (4at.%). The graphite cathode and anode target The material spacing is 2mm. Vacuum the cavity up to 6.6×10 -3 After Pa, put 25ml of liquid acetonitrile into the plasma arc discharge chamber, connect the DC power supply, adjust the voltage to 18V-40V, arc discharge occurs between the anode target and the cathode, and the arc discharge current is 80A, during the arc discharge process Adjust the working current and voltage to keep relatively stable, and the arc holding time is 30 minutes. In the above reaction atmosphere, the surface-loaded nano-Fe 2 o 3 Granular N-doped nanosheet graphite, after the reacti...

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Abstract

The invention aims to provide a preparation method of an N-doped nano lamellar graphite structure or an N-doped nano lamellar graphite structure loaded with Fe2O3 nanoparticles on the surface. A high-temperature plasma arc evaporation technology is adopted for preparation. A high-purity graphite rod is used as a cathode, a high-purity graphite rod or a mixed block of high-purity Fe powder and high-purity graphite powder is used as an anode, after the electric arc furnace is vacuumized, acetonitrile is introduced to serve as a carbon source and a nitrogen source, and after plasma arc dischargeis finished, sediments on the inner wall of a reaction cavity are collected to obtain wrinkled N-doped nano lamellar graphite of a large sheet layer, or Fe2O3 nanoparticle compounds are uniformly dispersed on the wrinkled N-doped nano lamellar graphite of the large sheet layer. A large number of the products can be prepared by using a simple and harmless high-temperature plasma arc evaporation method without any reaction gas, and the doping of an N element enables the nano lamellar graphite to be disordered and filled with a large number of defects, so that the nano lamellar graphite is certainly induced to generate new performance, and the nano lamellar graphite can be widely applied to wave absorption and other fields.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a new synthesis technology with thinner graphite sheets. It uses a plasma arc evaporation method to provide a method of in-situ mass production of N-doped graphite by introducing catalytic gas acetonitrile. Heterogeneous nanosheet graphite structure, or loaded Fe 2 o 3 A preparation method of N-doped nanosheet graphite structure of nanoparticles. Background technique [0002] Since single-layer graphene was prepared for the first time in 2004, the research door of graphene has been opened since then. Graphene is a two-dimensional carbon material that is densely packed with a single layer of carbon atoms and is only one carbon atom thick. With its good crystallinity, exceptional stability, and its special structure, it has produced many specific properties. At room temperature, the thermal conductivity of graphene is greater than 4000W / m K, and the specific surface area is close to 2630...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C01G49/06B82Y40/00B82Y30/00
CPCC01B32/184C01G49/06B82Y40/00B82Y30/00C01B2204/04C01B2204/32C01B2204/20C01P2004/80
Inventor 马嵩李帅贞华安耿殿禹雷子璇刘伟张志东
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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