Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

A kind of nitrogen-doped graphene and preparation method thereof

A nitrogen-doped graphene and mixture technology, which is applied in the field of carbon materials, can solve the problems of multiple preparation procedures, harsh reaction conditions, and low nitrogen doping amount, and achieves the effects of simple process, short production cycle, and easy large-scale production.

Inactive Publication Date: 2015-11-25
SHENZHEN CAPCHEM TECH CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have the following disadvantages at present: chemical vapor deposition method, ammonia source pyrolysis method, nitrogen plasma discharge method, arc discharge method, etc. have low nitrogen doping amount and many preparation procedures; liquid phase nitrogen doping method although nitrogen doping amount can be up to 16.4%, but involves the dangerous raw material Li 3 N, the reaction conditions are relatively harsh

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of nitrogen-doped graphene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0014] The preparation method of nitrogen-doped graphene provided by the invention comprises:

[0015] Heating the mixture of imidazole derivatives and inorganic bases to 400-800°C in a non-oxidizing atmosphere to obtain a mixture of nitrogen-doped graphene and metal oxides;

[0016] removing the metal oxide in the mixture to obtain nitrogen-doped graphene;

[0017] Wherein, the nitrogen source is selected from benzimidazole, methylmercaptobenzimidazole, mercaptobenzimidazole, 2-methylimidazole, 2-ethylimidazole, 2-butylimidazole, 2-undecylimidazole, 2 -One or more of heptadecyl imidazole and 1-benzyl-2-methylimidazole;

[0018] Wherein, the inorganic base is selected from one or more of hydroxides of lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium or barium.

[0019] The present invention prepares the mechanism of nitrogen-doped graphene as follows:

[0020] In a mixed system containing imidazole derivatives and inorganic bases, imidazole deriva...

Embodiment 1

[0029] Embodiment 1. Weigh 0.7 grams of benzimidazole and 1.5 grams of lithium hydroxide respectively, mix them in a mortar, put them into a magnetic boat, heat to 600 ° C in a tube furnace with a nitrogen atmosphere, and keep for 2 Hours, when the furnace temperature was lowered to room temperature, a nitrogen-doped graphene and calcium oxide composite was obtained, washed with 10 milliliters of 37% concentrated hydrochloric acid at room temperature for 4 hours, suction filtered to dryness, and nitrogen-doped graphene was obtained. According to elemental analysis, the nitrogen content of the nitrogen-doped graphene is 14%.

Embodiment 2

[0030] Example 2. Weigh 0.5 gram of benzimidazole and 1.5 gram of strontium hydroxide respectively, mix them evenly in a mortar, put them into a magnetic boat, heat to 800°C in a tube furnace with argon atmosphere, and keep After 2 hours, when the furnace temperature drops to room temperature, nitrogen-doped graphene and calcium oxide composites are obtained, washed with 10 ml of 37% concentrated hydrochloric acid at room temperature for 4 hours, and filtered to dryness to obtain nitrogen-doped graphite alkene. According to elemental analysis, the nitrogen content of the nitrogen-doped graphene is 10.3%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a nitrogen-doped graphene and a preparation method thereof. The preparation method comprises the following steps: heating a mixture of imidazole derivatives and inorganic base to 400-800 DEG C under a non-oxidizing atmosphere so as to obtain a nitrogen-doped graphene and metal oxide mixture; removing the metal oxide in the mixture to obtain the nitrogen-doped graphene. The nitrogen-doped graphene can be prepared by heating the mixture of imidazole derivatives and inorganic base under non-oxidizing atmosphere through utilizing conception that imidazole derivatives are pyrolyzed to generate activated carbon and nitrogen atoms and carry out base catalysis on accelerate the growth in two-dimension direction. The method has the characteristics of being simple in technology, short in production period, easy for mass production, free from dangerous and toxic raw materials, and capable of doping nitrogen in situ, and according to the selected different nitrogen sources, the prepared nitrogen-doped graphene has the characteristic of being adjustable in nitrogen content, the content of doped nitrogen can be up to 14% generally, and the nitrogen-doped graphene can be applied in the fields of lithium ion batteries, super capacitors, electric catalysis and the like.

Description

technical field [0001] The invention relates to the technical field of carbon materials, in particular to a nitrogen-doped graphene and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional honeycomb lattice material formed by a flat single layer of carbon atoms tightly bound together. Since Geim's group first prepared single-layer graphene in 2004, graphene has attracted widespread attention for its unique structure and excellent physical properties. However, since graphene has no energy band gap, its electrical conductivity cannot be fully controlled like traditional semiconductors, and the smooth and inert surface of graphene is not conducive to the recombination with other materials, thus hindering the application of graphene. Doping graphene with nitrogen can open the energy band gap and adjust the conductivity type, change the electronic structure of graphene, increase the free carrier density of graphene, and thus improve the condu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04
Inventor 马建民毛玉华
Owner SHENZHEN CAPCHEM TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com