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Gas sensitive sensor and application thereof in nitrogen dioxide gas detection

A gas sensor, silicon dioxide technology, applied in instruments, measuring devices, scientific instruments, etc., can solve problems such as human harm and application limitations of gas sensors, and achieve low production cost, fast response and recovery time, and responsiveness. Good results

Active Publication Date: 2020-06-30
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the gas sensor materials all need to work under high temperature or ultraviolet light, and there will be safety problems when using high temperature, and ultraviolet light also has the problem of being harmful to the human body, which brings problems to the application of gas sensor. limit
[0004] In view of this, the present invention provides a gas sensor and its application in nitrogen dioxide gas detection, which is used to solve the technical defect that the gas sensor needs to work under high temperature or ultraviolet light in the prior art, and has become a Problems to be solved urgently by those skilled in the art

Method used

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  • Gas sensitive sensor and application thereof in nitrogen dioxide gas detection
  • Gas sensitive sensor and application thereof in nitrogen dioxide gas detection
  • Gas sensitive sensor and application thereof in nitrogen dioxide gas detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment is a specific embodiment for preparing the gas sensor product 1 .

[0034] Preparation of white carbon suspension 1:

[0035] S1. The gold target with a purity greater than 99% is soaked in absolute ethanol. In a nitrogen and / or argon protective atmosphere, the laser ablation device is turned on. The laser beam passes through the total reflection lens and the focusing lens in sequence, and then focuses on the surface of the target to form a A spot with a diameter of 0.1cm undergoes a pulsed laser ablation reaction. The solid target forms a nanocrystal nucleus under the action of high temperature and high pressure of the laser. The nanocrystal nucleus grows into nanoparticles in a liquid environment. Anhydrous ethanol is catalyzed by the nanoparticles Cracking produces isolated carbon atoms, and a high temperature environment of 2600K-3800K generated by laser action can provide a nucleation thermodynamic environment for isolated carbon atoms to form whi...

Embodiment 2

[0042] This embodiment is a specific embodiment for preparing the gas sensor product 2 .

[0043] Preparation of white carbon suspension 2:

[0044] S1. The gold target with a purity greater than 99% is soaked in absolute ethanol. In a nitrogen and / or argon protective atmosphere, the laser ablation device is turned on. The laser beam passes through the total reflection lens and the focusing lens in sequence, and then focuses on the surface of the target to form a A spot with a diameter of 0.1cm undergoes a pulsed laser ablation reaction. The solid target forms a nanocrystal nucleus under the action of high temperature and high pressure of the laser. The nanocrystal nucleus grows into nanoparticles in a liquid environment. Anhydrous ethanol is catalyzed by the nanoparticles Cracking produces isolated carbon atoms, and a high temperature environment of 2600K-3800K generated by laser action can provide a nucleation thermodynamic environment for isolated carbon atoms to form whi...

Embodiment 3

[0051] This embodiment is a specific embodiment for preparing the gas sensor product 3 .

[0052] Preparation of white carbon suspension 3:

[0053] S1. The gold target with a purity greater than 99% is soaked in absolute ethanol. In a nitrogen and / or argon protective atmosphere, the laser ablation device is turned on. The laser beam passes through the total reflection lens and the focusing lens in sequence, and then focuses on the surface of the target to form a A spot with a diameter of 0.1cm undergoes a pulsed laser ablation reaction. The solid target forms a nanocrystal nucleus under the action of high temperature and high pressure of the laser. The nanocrystal nucleus grows into nanoparticles in a liquid environment. Anhydrous ethanol is catalyzed by the nanoparticles Cracking produces isolated carbon atoms, and a high temperature environment of 2600K-3800K generated by laser action can provide a nucleation thermodynamic environment for isolated carbon atoms to form whi...

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Abstract

The invention belongs to the technical field of sensor preparation, and particularly relates to a gas sensitive sensor and an application thereof in nitrogen dioxide gas detection. The invention provides the gas sensitive sensor. The gas sensitive sensor is provided with an interdigital electrode, wherein a white carbon suspension is dropwise added to the surface of the interdigital electrode andthen dried. The invention also provides the application of the gas sensitive sensor in nitrogen dioxide gas detection. Through detection, the gas sensitive sensor provided by the invention can be usedfor detecting nitrogen dioxide with different concentrations under normal-temperature visible light, and has the advantages of good responsiveness, high sensitivity, short response and recovery time,good reproducibility, strong selectivity and good moisture resistance; the preparation is simple, the production cost is low, and the gas sensitive sensor is green and environment-friendly and is particularly suitable for detecting low-concentration nitrogen dioxide in the environment. According to the gas sensitive sensor and the application of the gas sensitive sensor in nitrogen dioxide gas detection, the technical defect that in the prior art, the gas sensitive sensor can work only under high temperature or ultraviolet light is overcome.

Description

technical field [0001] The invention belongs to the technical field of sensor preparation, in particular to a gas sensor and its application in nitrogen dioxide gas detection. Background technique [0002] With the development of industrialization, more and more toxic and harmful gases are produced, and gas sensors are getting more and more attention as a device for detecting toxic and harmful gases. [0003] In the prior art, the gas sensor materials all need to work under high temperature or ultraviolet light, and there will be safety problems when using high temperature, and ultraviolet light also has the problem of being harmful to the human body, which brings problems to the application of gas sensor. limit. [0004] In view of this, the present invention provides a gas sensor and its application in nitrogen dioxide gas detection, which is used to solve the technical defect that the gas sensor needs to work under high temperature or ultraviolet light in the prior art, ...

Claims

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Application Information

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IPC IPC(8): G01N27/00
CPCG01N27/00
Inventor 杨国伟杨飞刘璞
Owner SUN YAT SEN UNIV