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

Preparation method and application of modified carbon fiber microelectrode

A micro-electrode and modified carbon technology, which is applied in the direction of material electrochemical variables, material analysis by electromagnetic means, and measurement devices, can solve the problems of low detection sensitivity, achieve high detection sensitivity, increase specific surface area, and low preparation cost Effect

Active Publication Date: 2018-10-16
QINGDAO UNIV
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention aims at the problem of low detection sensitivity of existing carbon fiber electrodes used for detecting nitrogen oxides, and provides a method for preparing a modified carbon fiber microelectrode for detecting nitrogen oxides

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 and application of modified carbon fiber microelectrode
  • Preparation method and application of modified carbon fiber microelectrode
  • Preparation method and application of modified carbon fiber microelectrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a modified carbon fiber microelectrode, comprising the following steps:

[0032] 1) Surface activation: Place a bundle of unsized T700 carbon fibers in absolute ethanol and ultrapure water in sequence, ultrasonically wash them for 5 minutes, and then place them in a nitric acid solution with a concentration of 65% to surface the carbon fibers by liquid phase oxidation. Activation, the activation temperature is 100°C, the time is 2h, and then the nitric acid on the surface of the activated carbon fiber is neutralized with 0.1mol / L NaOH, and the carbon fiber is cleaned with deionized water;

[0033] 2) Coating catalyst: preparing catalyst Ni(NO 3 ) 2 ·6H 2 Immerse the activated carbon fiber in an ethanol solution with an O concentration of 0.05mol / L, take it out after 1 hour, and dry it at 80°C for 30 minutes;

[0034] 3) Vapor-phase deposition of carbon nanofibers: step 2) the carbon fibers coated with the catalyst are evenly wound on the graphi...

Embodiment 2

[0038] A method for preparing a modified carbon fiber microelectrode, comprising the following steps:

[0039] 1) Surface activation: Place a bundle of unsized T800 carbon fibers in absolute ethanol and ultrapure water in sequence, ultrasonically wash them for 5 minutes, and then place them in a nitric acid solution with a concentration of 65% to surface the carbon fibers by plasma oxidation. Activation, the activation temperature is 110°C, the time is 1.5h, and then the nitric acid on the surface of the activated carbon fiber is neutralized with 0.1mol / L NaOH, and the carbon fiber is cleaned with deionized water;

[0040] 2) Coating catalyst: preparing catalyst Ni(NO 3 ) 2 ·6H 2 Immerse the activated carbon fiber in an ethanol solution with an O concentration of 0.5mol / L, take it out after 1 hour, and dry it at 80°C for 30 minutes;

[0041] 3) Vapor-phase deposition of carbon nanofibers: step 2) the carbon fibers coated with the catalyst are evenly wound on the graphite fr...

Embodiment 3

[0045] A method for preparing a modified carbon fiber microelectrode, comprising the following steps:

[0046] 1) Surface activation: Place a bundle of unsized T700 carbon fibers in absolute ethanol and ultrapure water in sequence, ultrasonically wash them for 5 minutes, and then place them in a nitric acid solution with a concentration of 65% to surface the carbon fibers by liquid phase oxidation. Activation, the activation temperature is 120°C, the time is 1h, and then the nitric acid on the activated carbon fiber surface is neutralized with 0.1mol / L NaOH, and the carbon fiber is cleaned with deionized water;

[0047] 2) Coating catalyst: preparing catalyst Ni(NO 3 ) 2 ·6H 2 Immerse the activated carbon fiber in ethanol solution with O concentration of 1mol / L, take it out after 1h, and dry at 80°C for 30min;

[0048] 3) Vapor-phase deposition of carbon nanofibers: step 2) the carbon fibers coated with the catalyst are evenly wound on the graphite frame, put into the CVD v...

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 a modified carbon fiber microelectrode. The preparation method comprises the steps of surface activation of a carbon fiber, catalyst coating, carbon nanofiber vapor deposition, copper nano particle deposition and assembly. The invention further discloses the application of the modified carbon fiber microelectrode in detection of a nitric oxide concentration. Vapor deposition of the carbon nanofiber is performed on the surface of the carbon fiber; the specific surface area of the carbon fiber can be increased; the contact probability of the carbonfiber and ions is increased; the deposited copper nano particle can allow the carbon fiber to have an electroreduction effect; the reuse stability of the microelectrode can be improved, so that the carbon fiber microelectrode capable of detecting nitrate by a synergic electrochemical action of electrochemical migration and copper oxidoreduction is constructed; and compared with the existing carbon fiber microelectrode, the carbon fiber microelectrode has the advantages of high detection sensitivity, stable output, low energy consumption, high detection speed, simple operation, low preparationcost and the like and can detect nitric oxide in air in real time.

Description

technical field [0001] The invention relates to the field of electrochemical sensors, in particular to a preparation method of a modified carbon fiber microelectrode and its application in detecting nitrogen oxides in air. Background technique [0002] Nitrate is the main component of water-soluble ions in air pollutants, which can cause many disasters, such as coughing, chest tightness, and asthma. The photochemical reaction of nitrogen oxides in the air is one of the main sources of nitrate, which comes from coal-fired boiler emissions and motor vehicle exhaust. Nitrogen oxides can produce extinction effect, reduce visibility, increase the water absorption of particles in the air, affect the optical properties and chemical composition of particles, and also increase the acidity of the atmosphere, forming acid rain and causing serious environmental problems. [0003] There are many methods for detecting nitrate content, such as ion chromatography, Fourier transform infrare...

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 Applications(China)
IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/308G01N27/48
Inventor 袁华赵延坤张安康丛海林于冰
Owner QINGDAO 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