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

Preparation method of nitrogen-doped carbon microspheres

A nitrogen-doped carbon and microsphere technology is applied in the field of preparation of carbon-doped microspheres, which can solve the problems of harsh reaction conditions and high equipment requirements, and achieve the effects of high selectivity, uniform distribution, and simplified preparation process.

Inactive Publication Date: 2015-12-16
HARBIN INST OF TECH
View PDF3 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problems that the existing heteroatom-doped carbon material preparation method requires high equipment and harsh reaction conditions, and provides a preparation method of nitrogen-doped carbon microspheres

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 nitrogen-doped carbon microspheres
  • Preparation method of nitrogen-doped carbon microspheres
  • Preparation method of nitrogen-doped carbon microspheres

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0032] Specific embodiment one: the preparation method of a kind of nitrogen-doped carbon microsphere of this embodiment is carried out according to the following steps:

[0033] 1. According to o-toluidine, H 2 o 2 and FeCl 3 The molar ratio is 6: (12 ~ 16): (0.8 ~ 1) ratio to weigh o-toluidine, H 2 o 2 and FeCl 3 , the H 2 o 2 and FeCl 3 Prepare solutions respectively, add o-toluidine to H under stirring condition 3 PO 4 In the aqueous solution, stir evenly, then add H 2 o 2 Aqueous solution and FeCl 3 aqueous solution, and then stirred at room temperature for 10 to 15 minutes to obtain a precursor solution;

[0034] 2. Transfer the original precursor solution obtained in step 1 to the reactor, seal it well, put the reactor into an oven, keep it at 130-160°C for 5-8 hours, cool to room temperature, centrifuge, and pour off the upper layer to clear the night , after washing the lower precipitate with distilled water and ethanol, put it in a vacuum drying oven at ...

specific Embodiment approach 2

[0036] Specific implementation mode two: the difference between this implementation mode and specific implementation mode one is that H in step two 3 PO 4 H in aqueous solution 3 PO 4 The concentration is 0.4~0.5mol / L; Others are the same as the first embodiment.

specific Embodiment approach 3

[0037]Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in step one, H 2 o 2 Aqueous solution is by H 2 o 2 It is mixed with water at a volume ratio of 30:100. Others are the same as in the first or second embodiment.

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
Particle sizeaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Mass specific capacitanceaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of doped carbon microspheres, particularly a preparation method of nitrogen-doped carbon microspheres, which aims to solve the technical problems of high facility request and harsh reaction conditions in the existing preparation method of the exotic-atom-doped carbon material. The method comprises the following steps: 1. adding o-toluidine into a H3PO4 water solution, stirring uniformly, sequentially adding a H2O2 water solution and a FeCl3 water solution, and stirring uniformly to obtain a precursor solution; 2. transferring the precursor solution into a reaction kettle, carrying out hydrothermal synthesis, separating, cleaning and drying to obtain poly-o-toluidine microspheres; and 3. roasting the poly-o-toluidine microspheres in a vacuum tube furnace under the protection of nitrogen to obtain the nitrogen doped-carbon microspheres. The nitrogen-doped carbon microspheres can be used as a fuel cell high-efficiency ORR electrocatalyst and a supercapacitor electrode material.

Description

technical field [0001] The invention relates to a preparation method of doped carbon microspheres. Background technique [0002] In recent years, carbon nanomaterials, as a cheap and stable material, are considered to have the most promising application prospects in energy storage devices and energy conversion devices. However, the electrical properties of original carbon materials are relatively weak. Up to now, the carbon-based energy materials that have been discovered are all doped nano-carbon materials, that is, heteroatom-doped carbon materials. This is because doped heteroatoms, especially nitrogen atoms, can not only provide lone pair electrons, but also change the spin density and charge density of carbon atoms, making them have high spin density. In addition, electrons can be donated from adjacent carbon atoms to the nitrogen atom, and electrons can also be fed back to the p of the carbon atom through the nitrogen atom. z track, thereby improving its electrical p...

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): C01B31/02
Inventor 徐平何艳贞韩喜江张彬
Owner HARBIN INST OF 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