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

Toluene and xylene gas sensitive material and preparation thereof as well as preparation method of toluene and xylene gas sensitive device

A gas-sensitive material and xylene technology, which is applied in the analysis of materials, material analysis by electromagnetic means, instruments, etc., can solve the problems of not yet commercialized, and achieve the effects of low price, wide detection range and high sensitivity

Inactive Publication Date: 2016-01-20
WUHAN INSTITUTE OF TECHNOLOGY
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, toluene and xylene gas sensors are in the stage of exploration and research in China, and have not yet been commercialized

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

[0029] To prepare toluene and xylene gas sensors, the steps are as follows:

[0030] 1) Weigh 3.65gZn(NO 3 ) 2 ·6H 2 O and 1.72g of HMT (hexamethyltetramine) were dissolved in 60mL of deionized water, stirred for 30min by magnetic force, and 0.02g of RhCl was added when stirring for 10min 3 ·3H 2 O, after stirring, put it into a hydrothermal reaction kettle and react at 180°C for 6 hours. After natural cooling, take it out for suction filtration, wash the product with deionized water and ethanol for 3 times, and then collect the powder and place it in a drying oven at 80°C Bake for 10 hours, then grind and put into a muffle furnace for sintering at 600° C. for 15 minutes, and then obtain rhodium-doped zinc oxide nanomaterials after cooling, i.e. toluene and xylene gas-sensitive materials (Rh in the gas-sensitive materials 2 o 3 The mass is 1% of the mass of ZnO);

[0031] 2) Mix the toluene and xylene gas-sensing materials prepared above into a paste with anhydrous ethan...

Embodiment 2

[0034] To prepare toluene and xylene gas sensors, the steps are as follows:

[0035] 1) Weigh 3.65KgZn(NO 3 ) 2 ·6H 2 Dissolve O and 1.0KgHMT in 6L of deionized water, stir for 1h with magnetic force, add 4gRhCl when stirring for 10min 3 ·3H 2 O, after stirring, put it into a hydrothermal reaction kettle and react at 180°C for 6 hours. After natural cooling, take it out for suction filtration, wash the product with deionized water and ethanol for 3 times, and then collect the powder and place it in a drying oven at 80°C Baked for 10 hours, then ground and put into a muffle furnace for sintering at 600°C for 0.5h, after cooling, rhodium-doped zinc oxide nanomaterials, i.e. toluene and xylene gas-sensitive materials (Rh in the gas-sensitive materials 2 o 3 The mass is 0.2% of the mass of ZnO);

[0036]2) Make the toluene and xylene gas-sensitive materials prepared above into a paste with absolute ethanol and a small amount of polyethylene glycol, and evenly coat the surfac...

Embodiment 3

[0039] To prepare toluene and xylene gas sensors, the steps are as follows:

[0040] 1) Weigh 1.83KgZn(NO 3 ) 2 ·6H 2 O and 1.5KgHMT were respectively dissolved in deionized water to form a 0.2mol / L solution, the two solutions were mixed and then magnetically stirred for 1h, and 3gRhCl was added when stirring for 10min 3 ·3H 2 O, after stirring, put it into a hydrothermal reaction kettle and react at 180°C for 12 hours. After natural cooling, take it out for suction filtration, wash the product with deionized water and ethanol for 5 times, and then collect the powder and place it in a drying oven at 80°C Bake for 10 hours, then grind and put into a muffle furnace for sintering at 600°C for 10 minutes, and then get toluene and xylene gas-sensitive materials after cooling (Rh in the gas-sensitive materials 2 o 3 The mass is 0.3% of the mass of ZnO);

[0041] 2) Make the toluene and xylene gas-sensitive materials prepared above into a paste with absolute ethanol and a small...

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 diameteraaaaaaaaaa
Sensitivityaaaaaaaaaa
Sensitivityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a toluene and xylene gas sensitive material and a preparation method thereof as well as a preparation method of a gas sensitive device. The toluene and xylene gas sensitive material is prepared from the following components: (I) base material layered flower-shaped ZnO nano powder; (II) Rh2O3, wherein the doping amount of the Rh2O3 is 0.1% to 5% of the mass of the base material layered flower-shaped ZnO nano powder. The toluene and xylene gas sensitive material is blended into paste by using a proper amount of absolute ethyl alcohol; then the paste is uniformly coated on the surface of an aluminum oxide ceramic electrode tube and is naturally aired; then the aluminum oxide ceramic electrode tube is subjected to annealing treatment to obtain a gas sensitive electrode tube; finally, the gas sensitive electrode tube is welded, electrically aged and packaged according to a heater-type structure traditional process to prepare the toluene and xylene gas sensitive device. The toluene and xylene gas sensitive material provided by the invention has high sensitivity on toluene and xylene, good selectivity and short responding time, and meets the requirements of the gas sensitive device.

Description

technical field [0001] The invention belongs to the technical field of metal oxide semiconductor gas-sensing devices, and relates to a toluene and xylene gas-sensing material, its preparation and a method for preparing the gas-sensing device. Background technique [0002] Toluene is mainly produced from crude oil through petrochemical processes. It can be used as a solvent for oils, resins, natural and synthetic rubber, coal tar, pitch, cellulose acetate, and for cellulose paints and varnishes, as well as for photography Solvent for plate making and ink. Toluene is also the main raw material for organic synthesis, especially the synthesis of benzoyl chloride and phenyl, saccharin, trinitrotoluene and many dyes. It is also a component of aviation and motor gasoline. Toluene is volatile and does not react easily in the environment. It is widely distributed in the environment, and it is continuously recycled between air and water bodies through evaporation from rain and water...

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): G01N27/00
Inventor 林志东陈紫伟孟柱付萍王学华
Owner WUHAN INSTITUTE 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