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

Method for preparing porous carbon fiber-based catalyst by desublimation compounding of metal oxide in carbonization process

A technology of porous carbon fiber and carbonization process, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical/physical process, etc. Oxide addition is limited, affecting carbon fiber support strength and other issues, to achieve the effect of reducing production cost, improving carbonization efficiency, and improving catalytic performance

Active Publication Date: 2021-11-23
WUHAN TEXTILE UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of metal oxide added in the composite spinning method is limited, otherwise it will affect the spinning performance, and then affect the support strength of carbon fiber, and the number of exposed metal oxide active components is limited, so the catalytic efficiency needs to be improved
Metal oxides and carbon fibers have low loading fastness and poor durability in the solution dipping coating method

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
  • Method for preparing porous carbon fiber-based catalyst by desublimation compounding of metal oxide in carbonization process
  • Method for preparing porous carbon fiber-based catalyst by desublimation compounding of metal oxide in carbonization process
  • Method for preparing porous carbon fiber-based catalyst by desublimation compounding of metal oxide in carbonization process

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041]In step S1, the preparation method of the porous polymer fiber net includes: mixing a polymer spinning solution with a mass fraction of 10-17% and a porogen of 10-17% for centrifugal spinning, and collecting the net into a web , to obtain the porous polymer fiber web.

[0042] The rotational speed of the centrifugal spinning is 2000-8000r / min, the spinneret aperture is 0.1-1mm, the spinning temperature is 20-80°C, and the collection distance is 1-15cm.

[0043] The porous polymer fiber web is polyacrylonitrile-based fiber web, lignin-based fiber web, polyimide-based fiber web or pitch-based fiber web; preferably polyacrylonitrile fiber web. The porogen is polyethylene glycol, polyvinylpyrrolidone, polyvinyl butyral or polyvinyl alcohol. By adding a porogen, it decomposes under high temperature conditions, thereby forming a porous structure.

[0044] In step S3, the carbonization of the pre-oxidized filaments of the porous polymer fiber web is staged heating carbonizati...

Embodiment 1

[0057] A method for preparing a porous carbon fiber-based catalyst through the desublimation of metal oxides in a carbonization process, comprising the steps of:

[0058] S1. Preparation of carbon fiber mesh: first dissolve polyacrylonitrile powder and polyethylene glycol in a mixed solution of N,N-dimethylformamide (DMF) and acetone, and stir to form a mass fraction of polyacrylonitrile of 17%. , polyethylene glycol mass fraction is 10% spinning solution (stirring speed is 200-800r / min, stirring time is 1-5h); Then the spinning solution is injected in the centrifugal spinning device and carries out centrifugal spinning (centrifugal spinning The rotation speed of the filaments is 5000r / min, the spinneret aperture is 0.2mm, the spinning temperature is 60°C, and the collection distance is 10cm) and collected to obtain a polyacrylonitrile fiber web.

[0059] S2. Pre-oxidation of polyacrylonitrile fiber web: put the hot-pressed polyacrylonitrile fiber web layer into a muffle furna...

Embodiment 2

[0062] A kind of method that metal oxide desublimates compositely to prepare porous carbon fiber-based catalyst in the carbonization process, compared with embodiment 1, the difference is that the content of polyethylene glycol and zinc oxide particle size and the highest carbonization temperature are as shown in Table 1 shown. Others are substantially the same as in Embodiment 1, and will not be repeated here.

[0063] The composite material of zinc oxide / porous carbon fiber mesh prepared above is used for the treatment of printing and dyeing wastewater. Take 20ml of organic wastewater containing methyl orange, put 0.04g of zinc oxide / porous carbon fiber mesh into it, and irradiate it with a high-pressure mercury lamp for 30 minutes. Test the removal rate of methyl orange in the dye.

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 provides a method for preparing a porous carbon fiber-based catalyst by desublimation compounding of a metal oxide in a carbonization process. The method comprises the following steps: firstly, preparing a porous polymer fiber material, and then conducting pre-oxidizing to obtain porous polymer fiber web pre-oxidized fibers; and placing the porous polymer fiber web pre-oxidized fiber and a metal oxide in an ultrahigh-temperature ceramic material at the same time, conducting sealing, then placing the materials in a tubular furnace, conducting heating, carbonizing the porous polymer fiber web pre-oxidized fiber into a porous carbon fiber web under a high-temperature condition in an inert atmosphere, sublimating the metal oxide at the carbonization temperature to form metal oxide steam, and desublimating the metal oxide steam during cooling to be combined with the porous carbon fiber web to obtain the metal oxide / carbon fiber net composite material. The preparation method has the advantages that the preparation method is simple, the metal material loading fastness is high, and the metal / carbon fiber net composite material is high in conductivity and catalytic efficiency and low in cost.

Description

technical field [0001] The invention relates to the technical field of preparation of catalytic materials, in particular to a method for preparing a porous carbon fiber-based catalyst through desublimation and compounding of metal oxides in a carbonization process. Background technique [0002] As a catalyst active component, the metal oxide is compounded with a conductive carbon support material and can be used in the field of catalysis, such as an electrode catalyst for a fuel cell. A fuel cell is a green, efficient energy conversion device that directly converts the chemical energy of fuel into electrical energy without burning it. The preparation of catalysts with high catalytic activity, good durability, and low cost is one of the key factors for the commercialization of fuel cells. Carbon support plays a very important and even crucial role in the performance of polymer membrane fuel cell catalysts. At present, catalyst supports are mainly based on carbon materials. ...

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): B01J21/18B01J23/06B01J35/06B01J37/02B01J37/08C02F1/00H01M4/88H01M4/90C02F101/30
CPCB01J37/0238B01J37/084B01J23/06B01J21/18C02F1/00H01M4/8867H01M4/9083C02F2101/30B01J35/58Y02E60/50
Inventor 潘恒吴志语覃淑仪段柳田宇奕全怡雪刘欣
Owner WUHAN TEXTILE UNIV
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