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

A kind of preparation method of three-dimensional porous carbon

A three-dimensional porous, dopamine technology, applied in the field of porous materials, can solve the problems of complex methods, many steps, difficult to prepare in large quantities, etc., and achieve the effects of simplifying process steps, reducing equipment loss, and avoiding purification steps.

Active Publication Date: 2020-10-13
NAT UNIV OF DEFENSE TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have many steps, complex methods, are difficult to prepare in large quantities, and the specific surface area of ​​the product obtained is not high enough (generally less than 2000m 2 / g), additional acid (H 3 PO 4 ) or alkali (KOH) activation and other issues

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 preparation method of three-dimensional porous carbon
  • A kind of preparation method of three-dimensional porous carbon
  • A kind of preparation method of three-dimensional porous carbon

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] A method for preparing three-dimensional porous carbon of the present invention includes the following steps:

[0031] The sugar source, dopamine and ammonium chloride are mixed uniformly, and the resulting mixture is first raised from room temperature to 250℃~300℃ under the protection of an inert atmosphere, and then accelerated to 800℃~1200℃, and then sintered at a constant temperature for 2h~ After 6h, cool to room temperature to obtain self-supporting three-dimensional porous carbon.

[0032] In the above preparation method, the mass ratio of sugar source and dopamine is 4-100:1 (ie 99:1-80:20), and the ratio of the total mass of sugar source and dopamine to the mass of ammonium chloride is 0.2-5:1 (Ie 1:5~5:1).

[0033] In the above preparation method, when the room temperature rises to 250℃~300℃, the heating rate is 1℃ / min~10℃ / min, and the temperature is kept for 0~3h; accelerate the continuous heating stage, the heating rate is 2℃ / min~15℃ / min, and the heating rate at...

Embodiment 1

[0037] A method for preparing three-dimensional porous carbon of the present invention includes the following steps:

[0038] Mix 2g glucose, 0.1g dopamine and 2g ammonium chloride uniformly. Place the resulting mixture in a tube furnace. Under the protection of nitrogen, the room temperature will be raised at 2℃ / min to 250℃, and then at 4℃ / min. Min continue to rise to 1000 ℃, keep the temperature constant for 3 hours, and then naturally cool to room temperature to obtain self-supporting three-dimensional porous carbon.

[0039] Characterize the self-supporting three-dimensional porous carbon prepared in this example, figure 1 Is an optical photograph of three-dimensional porous carbon, figure 2 For scanning electron micrographs, we can see that there are many pore structures on the sample surface, image 3 It is the nitrogen adsorption and desorption curve of the sample, the BET specific surface area is 2600m 2 / g.

Embodiment 2

[0041] A method for preparing three-dimensional porous carbon of the present invention includes the following steps:

[0042] Mix 2g glucose, 0.02g dopamine and 2g ammonium chloride uniformly. Place the resulting mixture in a tube furnace. Under nitrogen protection, first raise the room temperature from 2°C / min to 250°C and keep it warm for 2 hours. Continue to heat up to 1000°C at 8°C / min, keep the temperature constant for 3 hours, and then naturally cool to room temperature to obtain self-supporting three-dimensional porous carbon.

[0043] Characterize the self-supporting three-dimensional porous carbon prepared in this example, Figure 4 Is an optical photo of a self-supporting three-dimensional porous carbon, Figure 5 For scanning electron micrographs, we can see that there are many pore structures on the surface, Image 6 It is the nitrogen adsorption and desorption curve of the sample, the BET specific surface area is 2700m 2 / g.

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
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of three-dimensional porous carbon. The preparation method comprises the following steps: uniformly mixing a sugar source, dopamine and ammonium chloride,heating the obtained mixture from room temperature to 250-300 DEG C under the protection of an inert atmosphere, accelerating temperature rise to 800-1200 DEG C, and sintering at constant temperaturefor 2h-6h, and cooling to room temperature to obtain the self-supported three-dimensional porous carbon. By the preparation method, only one step of pyrolysis is performed without any additional stepsto obtain the self-supported three-dimensional porous carbon having a specific surface area of up to 2700 m<2> / g.

Description

Technical field [0001] The invention belongs to the field of porous materials, and relates to a preparation method of three-dimensional porous carbon, in particular to a preparation method of self-supporting three-dimensional porous carbon with a high specific surface area. Background technique [0002] The self-supporting three-dimensional porous carbon material has a wide range of applications in the fields of catalysis, energy, environment, etc. because of its rich pore structure, high specific surface area, and good electrical conductivity. In order to maximize its effect, the preparation of three-dimensional porous carbon with high specific surface area is always the direction of people's efforts. At present, the preparation methods of self-supporting three-dimensional porous carbon can be roughly divided into four categories: one is the self-assembly method of graphene oxide, including hydrothermal treatment, freeze-drying, vacuum volatilization, and drip coating, and the o...

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): C01B32/318C01B32/342C01B32/348
CPCC01B32/318C01B32/342C01B32/348
Inventor 陶呈安肖涵波王芳王建方李玉姣阳绪衡宋琛超陈瑞
Owner NAT UNIV OF DEFENSE TECH
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