Electrochemical CO gas sensor

A sensor and electrochemical technology, applied in the field of carbon monoxide gas sensors, can solve the problems of unstable performance, short life, volatile electrolyte solution, etc., and achieve the effects of high energy utilization rate, extended life, and excellent moisture retention.

Inactive Publication Date: 2010-12-08
HEFEI UNIV OF TECH
View PDF3 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at providing a CO gas electrochemical sensor with a long service life in view of defects such as volatile electrolyte solu

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
  • Electrochemical CO gas sensor
  • Electrochemical CO gas sensor
  • Electrochemical CO gas sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] 1. Sensor structure

[0032] The structure of the CO sensor of the present invention is as follows figure 1 shown. The shell and base used by the sensor are high-hard polytetrafluoroethylene, and the shell is coated with a potassium permanganate / sodium hydroxide mixture that can absorb interfering gases (sulfides, nitrogen oxides). The working electrode is based on graphite, which is decorated with a sensitive film composed of hydrogel / nano platinum-nickel / carbon nanotube / solid room temperature ionic liquid (SPA / Pt-Ni / MWCNT / OPTP). The reference and auxiliary electrodes were silver and platinum wires, respectively, coated with hydrogel. The electrolytes are conductive hydrogels and solid room temperature ionic liquids. The porous polytetrafluoroethylene filter membrane prevents dust and impurities from entering the sensor.

[0033] 2. Preparation of Pt / MWCNT and Ni / MWCNT catalysts

[0034] Reflux 10 mg MWCNTs in a mixture of 10 mL perchloric acid and concentrated ni...

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 relates to an electrochemical CO gas sensor which comprises a shell (6), a porous film (7), a reference electrode (1), a working electrode (2) and an auxiliary electrode (3). The reference electrode (1), the working electrode (2) and the auxiliary electrode (3) are encapsulated in the shell (6). The electrochemical CO gas sensor is characterized in that a composite catalyst film (5)is coated on the working electrode (2), hydrogel (4) is simultaneously coated on the reference electrode (1), the auxiliary electrode (3) and the composite catalyst film (5) which is formed by mixinga mixed catalyst and N-octyl pyridinium hexafluorophosphate in a mass ratio of 1-20 to 1, the mixed catalyst is formed by mixing nano Pt/carbon nanotubes and nano nickel / carbon nanotubes in a mass ratio of 10-40 to 1, and the hydrogel is gel formed in a way that superabsorbent absorbs water which contains dissolved lithium perchlorate and polyvinyl alcohol. The sensor is watertight and has the service life of 3-5 years and stable performance, and the decorative film on the working electrode is replaceable.

Description

1. Technical field [0001] The present invention relates to a carbon monoxide (CO) gas sensor, specifically a CO gas electrochemical sensor. 2. Background technology [0002] The content of the environmentally harmful gas CO has always been one of the important indicators for evaluating the quality of the gas environment. How to monitor its content accurately, quickly and sensitively is of great significance. When the concentration of CO in the air reaches 10ppm, it will cause the nervous system of the human body to react after 10 minutes, causing people to move slowly and lose consciousness; when the concentration reaches 30ppm, it will cause visual and hearing impairment; Body hypoxia and fatal (D. Gorman, A. Drewry, Y. L. Huang, C. Sames, Toxicology, 2003, 187, 25). [0003] At present, there are two types of CO gas sensors commonly used at home and abroad, one is based on Beer's law and the principle of selective absorption of infrared rays by gases, and is designed by u...

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): G01N27/26G01N27/30
Inventor 晋冠平李娟彭霞陈振兴扬杰李改平
Owner HEFEI UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap