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

Au/SnS2 nitrogen dioxide gas sensor and preparation process and application thereof

A gas sensor, nitrogen dioxide technology, applied in instruments, scientific instruments, measuring devices, etc., can solve the problems of restricting the wide application of sensors, long response recovery time, etc., and achieve low power consumption, fast heating response, and simple preparation process. Effect

Inactive Publication Date: 2019-08-06
HAINAN UNICAN SCI & TECH INNOVATION INST CO LTD
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the tin disulfide gas sensor can detect low-concentration nitrogen dioxide gas under low temperature conditions, the long response recovery time still restricts the wide application of this type of sensor in daily life and production.

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
  • Au/SnS2 nitrogen dioxide gas sensor and preparation process and application thereof
  • Au/SnS2 nitrogen dioxide gas sensor and preparation process and application thereof
  • Au/SnS2 nitrogen dioxide gas sensor and preparation process and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Au / SnS 2 Nitrogen dioxide gas sensor, including a gas-sensing material and a heating substrate, the gas-sensing material is spin-coated on the surface of the heating substrate, and the coating thickness is 100 μm; the composition of the gas-sensing material is gold simple substance nanoparticles and SnS 2 Nanocomposites formed from nanosheets. Au / SnS 2 Nanocomposites were prepared by a two-step solvothermal-deposition method; SnS 2 The size of the nanosheet is 600nm; the size of the gold simple nanoparticle is 10nm. The preparation process comprises the following steps:

[0033] Step 1: Using a mixture of 36.4mL of acidic buffer solution with pH=3 and 9.12mL of absolute ethanol as a solvent, 379.04mg of SnCl 2 2H 2 O was added to the mixture, stirred magnetically until it was completely dissolved, and the solution was colorless and transparent; then added 2084.81mg Na 2 S 2 o 3 ·5H 2 O and 270.76mg of sulfur powder, magnetically stirred for 40min and then poure...

Embodiment 2

[0037] Au / SnS 2 Nitrogen dioxide gas sensor, including a gas-sensing material and a heating substrate, the gas-sensing material is spin-coated on the surface of the heating substrate, and the coating thickness is 50 μm; the gas-sensing material is Au / SnS prepared by doping 0.1% gold simple substance nanoparticles 2 nanocomposites. Au / SnS 2 Nanocomposites were prepared by a two-step solvothermal-deposition method; SnS 2 The size of the nanosheet is 200nm; the size of the gold simple nanoparticle is 5nm. The preparation process comprises the following steps:

[0038] Step 1: Using a mixture of 31.6mL of acidic buffer solution with pH=3 and 8.33mL of absolute ethanol as a solvent, 371.67mg of SnCl 2 2H 2 O was added to the mixture, stirred magnetically until it was completely dissolved, and the solution was colorless and transparent; then added 2066.67mg Na 2 S 2 o 3 ·5H 2 O and 266.67mg of sulfur powder were stirred by magnetic force for 30min and then poured into the r...

Embodiment 3

[0042] The difference between this example and Example 2 is that 2 mL of chloroauric acid, 2 mL of L-lysine, and 0.2 mL of sodium citrate are added in step 2, and the rest of the steps and parameters are the same as in Example 2. According to this embodiment, Au / SnS doped with 0.5% gold single substance nanoparticles can be prepared 2 Nitrogen dioxide gas sensor.

[0043] figure 1 The Au / SnS prepared in this example is given 2 Field emission electron microscope scanning image of the nanocomposite microstructure; figure 2 The Au / SnS prepared in this example is given 2 The field emission electron microscope scanning EDS image of the microstructure of the nanocomposite material shows that the prepared nanocomposite material contains three elements: Au, Sn and S; image 3 The Au / SnS prepared in this example is given 2 The HTEM image of the microstructure of the nanocomposite further illustrates that the nanocomposite is composed of simple gold nanoparticles and SnS 2 Compos...

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
thicknessaaaaaaaaaa
sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to an Au / SnS2 nitrogen dioxide gas sensor comprising a gas sensitive material and a heating substrate. The gas sensitive material is coated on the surface of the heating substrate in a spinning manner and includes nanocomposite material formed by gold simple-substancenano particles and SnS2 nanosheets. In addition, the preparation process comprises the following steps: step one, mixing an acidic buffer solution with absolute ethyl alcohol, adding SnCl2.2H2O into the mixed solution, and carrying out stirring for dissolution; adding Na2S2O3.5H2O and sulfur powder, carryingout stirring, pouring the mixture into a reaction kettle for reaction to obtain a yellow sediment; cleaning and drying the sediment to obtain SnS2; step two, dispersing the SnS2, adding chloroauric acid and L-lysine, carrying out stirring fully, and then adding sodium citrate to carry out gold simple substance reduction; and carrying out cleaning and drying on the obtained product to obtain Au / SnS2; and step three, adding Au / SnS2 into deionized water, carrying out fully grinding and then coating the surface of a heating substrate with the ground substance in a spinning manner, and carrying outdrying to obtain a Au / SnS2 nitrogen dioxide gas sensor. The preparation process is simple; the obtained Au / SnS2 has the great application value in the preparation of the gas-sensitive sensor; and thesensor makes a sensitive and rapid response to nitrogen dioxide.

Description

technical field [0001] The invention belongs to the technical field of nitrogen dioxide gas sensors, in particular to an Au / SnS sensor 2 Nitrogen dioxide gas sensor, preparation process and application. Background technique [0002] Nitrogen dioxide gas is a common poisonous and harmful gas, which mainly comes from the combustion of chemical dyes in industrial production and the emission of automobile exhaust. It is recognized by the World Health Organization as the most common and most harmful air pollutant. Long-term exposure to low-concentration nitrogen dioxide gas can endanger human health, such as inducing emphysema, bronchitis, asthma and other respiratory diseases. The application of low-concentration nitrogen dioxide detection in the medical field has opened up new directions for the application of this type of gas sensor, such as diagnosing the infection of human lung tissue and identifying allergic enteritis by detecting the content of nitrogen dioxide gas exhale...

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): G01N27/12
CPCG01N27/127
Inventor 林仕伟顾丁李晓干刘炜陈汉德符坚林慧媛王玲转
Owner HAINAN UNICAN SCI & TECH INNOVATION INST CO LTD
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