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

High selectivity composite gas sensitive material used for detection of acetic acid gas in air

A gas-sensing material and high-selectivity technology, applied in the field of composite gas-sensing materials, can solve the problems of long time consumption and high cost, and achieve the effects of short response recovery time, rapid detection, and improved sensitivity

Active Publication Date: 2018-11-30
ANHUI UNIVERSITY OF TECHNOLOGY
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods for measuring the concentration of acetic acid in the air mainly use gas chromatography and ion chromatography, etc. These methods require relatively expensive instruments and equipment, and sampling and analysis take a long time

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Weigh 0.04 grams of C 3 N 4 In 20ml of deionized water, ultrasonic treatment for 1 hour to obtain C 3 N 4 Suspension, then weighed 2.97 g Zn(NO 3 ) 2 ·6H 2 O, add to C while stirring 3 N 4 In the suspension, fully stir for 30 minutes, then slowly add 1mol / L NaOH solution to the suspension to adjust the pH of the mixed solution to 10.0, then add deionized water to the mixture volume to 70ml, and transfer the reaction solution to 100ml hydrothermal The reaction kettle was reacted at 180°C for 12 hours, the obtained precipitate was washed three times with absolute ethanol, and the product was then baked at 80°C for 24 hours. Get 5wt% C 3 N 4 -ZnO composite material.

[0014] The material is made into an indirectly heated element, and the highest sensitivity of the element to 0.1, 1, 10, 100, and 1000ppm acetic acid gas at a working temperature of 300℃ is 1.2, 2.0, 7.2, 25.8, 81.5, 290.0, respectively; for 1000ppm acetone The sensitivity of, formaldehyde, ethanol, acetaldehyde...

Embodiment 2

[0016] Weigh out 0.08 grams of C 3 N 4 In 20ml of deionized water, ultrasonic treatment for 1 hour to obtain C 3 N 4 Suspension, then weighed 2.97 g Zn(NO 3 ) 2 ·6H 2 O, add to C while stirring 3 N 4 In the suspension, fully stir for 30 minutes, then slowly add 1mol / L NaOH solution to the suspension to adjust the pH of the mixed solution to 10.0, then add deionized water to the mixture volume to 70ml, and transfer the reaction solution to 100ml hydrothermal The reaction kettle was reacted at 180°C for 12 hours, the obtained precipitate was washed three times with absolute ethanol, and the product was then baked at 80°C for 24 hours. Get 10wt% C 3 N 4 -ZnO composite material.

[0017] The material is made into an indirectly heated element, and the highest sensitivity of the element to 0.1, 1, 10, 100, and 1000 ppm acetic acid gas at a working temperature of 300 ℃ is 1.3, 2.5, 9.2, 40.7, 168.6, 312.3, respectively; for 1000 ppm acetone The sensitivity of formaldehyde, ethanol, acet...

Embodiment 3

[0019] Weigh 0.12 grams of C 3 N 4 In 20ml of deionized water, ultrasonic treatment for 1 hour to obtain C 3 N 4 Suspension, then weighed 2.97 g Zn(NO 3 ) 2 ·6H 2 O, add to C while stirring 3 N 4 In the suspension, fully stir for 30 minutes, then slowly add 1mol / L NaOH solution to the suspension to adjust the pH of the mixed solution to 10.0, then add deionized water to the mixture volume to 70ml, and transfer the reaction solution to 100ml hydrothermal The reaction kettle was reacted at 180°C for 12 hours, the obtained precipitate was washed three times with absolute ethanol, and the product was then baked at 80°C for 24 hours. Get 15wt% C 3 N 4 -ZnO composite material.

[0020] The material is made into an indirectly heated element, and the highest sensitivity of the element to 0.1, 1, 10, 100, and 1000ppm acetic acid gas at a working temperature of 300℃ is 1.4, 3.8, 13.4, 56.8, 212.4, 350.0, respectively; for 1000ppm acetone The sensitivity of, formaldehyde, ethanol, acetaldeh...

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 high selectivity composite gas sensitive material used for detection of acetic acid gas in the air, and belongs to the technical field of gas sensitive material. The high selectivity composite gas sensitive material is C3N4-ZnO, the mass amount of C3N4 accounts for 5 to 20% of the total material mass; a side-heating gas-sensitive sensor is prepared from the high selectivity composite gas sensitive material, at 300 DEG C working temperature, the sensitivity on 0.1ppm acetic acid ranges from 1.2 to 1.4, the sensitivity on 1000ppm acetic acid ranges from 290 to 350, thesensitivity on 1000ppm acetone, formaldehyde, ethanol, acetaldehyde, and ammonia gas is lower than 31, it is shown that C3N4 is capable of increasing the sensitivity of zinc oxide on acetic acid gas,and increasing gas sensitive selectivity of zinc oxide on acetic acid gas, so that rapid detection of the concentration of acetic acid in the air is realized, and influences of acetone, formaldehyde,ethanol, acetaldehyde, and ammonia gas are eliminated.

Description

Technical field [0001] The invention belongs to the field of gas-sensitive materials, and in particular relates to a composite gas-sensitive material for detecting acetic acid gas in the air. The material is used to make a gas sensor. The made gas sensor has high sensitivity and good sensitivity to low concentration of acetic acid in the air Selective. Background technique [0002] Acetic acid is a volatile colorless liquid with a strong pungent odor. It is highly corrosive and can cause blistering, redness and swelling of the skin and mucous membranes. Higher concentrations can cause rhinitis and bronchitis. In severe cases, acute chemical reactions can occur. Pneumonia. At present, acetic acid is widely used in chemical enterprises, and more and more enterprises are involved in monitoring the concentration of acetic acid in environmental assessment and acceptance monitoring. The health standard of the United States, Japan and other countries is 25mg / m 3 (Approximately 9.3ppm)...

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): G01N27/12
CPCG01N27/125
Inventor 储向峰刘俊松董永平白林山
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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