Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of three-dimensional nitrogen doped graphene

A technology of nitrogen-doped graphene and graphene, which is applied in the field of preparation of three-dimensional nitrogen-doped graphene, can solve problems such as collapse, high cost, and low output, and achieve simple operation, good structural stability, and low nitrogen doping amount high effect

Inactive Publication Date: 2016-07-06
GUILIN UNIVERSITY OF TECHNOLOGY
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Leng Xuanye et al. (Chinese invention patent, CN104777207A) used the foam material as the substrate, and used the CVD method to deposit nitrogen-doped graphene under the condition of a nitrogen source, and obtained three-dimensional unsupported nitrogen-doped graphene after acid etching. However, CVD The cost of the method is high and the output is low; Xu Chunxiang et al. (Chinese invention patent, CN103496695A) added hexamethylenetetramine to the graphene oxide hydrosol, carried out nitrogen doping during the thermal reduction process, and obtained a three-dimensional structure nitrogen doping by freeze-drying graphene, but this structural solution collapses

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
  • Preparation method of three-dimensional nitrogen doped graphene
  • Preparation method of three-dimensional nitrogen doped graphene
  • Preparation method of three-dimensional nitrogen doped graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1. Put 1 g of commercially available expandable graphite in a crucible, place it in a microwave oven, and treat it with 800W microwave for 8 seconds to obtain three-dimensional graphene.

[0017] 2. Combine 200mg of three-dimensional graphene obtained in step (1) with NH 4 Cl mixing, three-dimensional graphene and NH 4 The mass ratio of Cl is 2:4.

[0018] 3. Put the mixture obtained in step (2) in N 2 In the atmosphere, heat treatment at 800°C for 3 hours to obtain three-dimensional nitrogen-doped graphene.

Embodiment 2

[0020] 1. Put 1 g of commercially available expandable graphite in a crucible, place it in a microwave oven, and treat it with microwaves at a power of 700W for 6 seconds to obtain three-dimensional graphene.

[0021] 2. Combine 200 mg of three-dimensional graphene obtained in step (1) with NH 4 Cl mixing, three-dimensional graphene and NH 4 NO 3 The mass ratio is 2:1.

[0022] 3. Put the mixture obtained in step (2) in N 2 In the atmosphere, heat treatment at 700°C for 2 hours to obtain three-dimensional nitrogen-doped graphene.

Embodiment 3

[0024] 1. Put 1 g of commercially available expandable graphite in a crucible, place it in a microwave oven, and treat it with microwaves at a power of 700W for 8 seconds to obtain three-dimensional graphene.

[0025] 2. Combine 200 mg of three-dimensional graphene obtained in step (1) with (NH 4 ) 2 SO 4 Hybrid, three-dimensional graphene and (NH 4 ) 2 SO 4 The mass ratio is 2:3.

[0026] 3. Put the mixture obtained in step (2) in N 2 In the atmosphere, heat treatment at 900°C for 3 hours to obtain three-dimensional nitrogen-doped graphene.

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

No PUM Login to View More

Abstract

The invention discloses a preparation method of three-dimensional nitrogen doped graphene. The preparation method comprises: (1) putting 1g of commercially-available expandable graphite into a crucible, and putting the crucible in a microwave oven for microwave treatment to obtain three-dimensional graphene, wherein in the process of microwave treatment, the power is 600-800W, and the treatment time is 5-15 seconds; (2) mixing 200mg of the three-dimensional graphene with an ammonium salt, wherein the mass ratio of the three-dimensional graphene to the ammonium salt is 2:(0.5-6); and (3) performing heating treatment on the mixture obtained in the step (2) in a N2 atmosphere to obtain three-dimensional nitrogen doped graphene, wherein the heat treatment temperature is 600-900 DEG C, and the heat treatment time is 2-5 hours; the ammonium salt is one of NH4Cl, (NH4)2SO4 and (NH4)3PO3. The preparation method disclosed by the invention is easy to operate, the three-dimensional graphene with a stable structure is obtained by adopting a microwave expansion method, an inorganic salt is used as a nitrogen source, nitrogen doping treatment is performed in the process of heat treatment, and subsequent cleaning and drying processes are not needed; and the obtained product is good in structural stability and high in nitrogen doping amount.

Description

technical field [0001] The invention relates to a preparation method of three-dimensional nitrogen-doped graphene. Background technique [0002] Graphene is an emerging two-dimensional carbon material, which has the advantages of high electrical conductivity, large specific surface area, and good chemical stability. Doping graphene with nitrogen can adjust its electronic structure, change surface properties, and introduce active groups. . Nitrogen-doped graphene has been widely used in supercapacitors, lithium-air batteries, lithium-ion batteries, and oxygen reduction catalysis. (ACS Appl. Mater. Interfaces, 2014, 6, 6361-6368. Energy Environ. Sci., 2012, 5, 6928-6932; NanoLett., 2014, 14, 1164, 1171.) [0003] Graphene has a planar structure, and single-layer graphene is easy to agglomerate, which will greatly reduce the specific surface area of ​​graphene, thereby reducing its battery capacity and catalytic activity. The construction of a three-dimensional structure can...

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
IPC IPC(8): C01B31/04
CPCC01P2002/85C01P2004/03
Inventor 罗志虹罗鲲朱旻
Owner GUILIN UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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