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CO2 gas-sensitive material for respiratory gas detection and preparation method and application thereof

A gas-sensing material, carbon dioxide technology, applied in the field of material processing, achieves good gas-sensing performance, simple and safe preparation method, and high practicability

Inactive Publication Date: 2021-11-23
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While using ZnSnO 3 Micro-nano materials for CO 2 Detected but rarely reported

Method used

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  • CO2 gas-sensitive material for respiratory gas detection and preparation method and application thereof
  • CO2 gas-sensitive material for respiratory gas detection and preparation method and application thereof
  • CO2 gas-sensitive material for respiratory gas detection and preparation method and application thereof

Examples

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preparation example Construction

[0035] The preparation method and application of the gas-sensitive material of the present invention are carried out as follows:

[0036] (1) Preparation of mixed solvent: at normal temperature, 2.1g of SnCl 4 ·5H 2 O, 0.44g of Zn(AC) 2 2H 2 O, the NaOH of 1.5g, the polyvinylpyrrolidone of 1.2g, the H of 5ml mass fraction are 30% 2 o 2 The solution was mixed with an appropriate amount of deionized water, and magnetically stirred to obtain a 40ml uniformly mixed solution.

[0037] (2) Pretreatment: Transfer the mixed solution obtained in step (1) to a polytetrafluoroethylene-lined stainless steel autoclave, seal it, and react at 180°C. After the reaction, cool naturally to room temperature, centrifuge, wash, drying to obtain the precursor material;

[0038] (3) Drying treatment: place the precursor material obtained in step (2) in air at 80°C for 12 hours, then cool naturally to room temperature to obtain ZnSnO 3 Nanoparticle cluster materials.

[0039] (4) Coating: Gri...

example example 1

[0043] ZnSnO 3 Preparation of nanoparticle gas sensor:

[0044] At room temperature, 2.1g of SnCl 4 ·5H 2 O, 0.44g of Zn(AC) 2 2H 2 O, the NaOH of 1.5g, the polyvinylpyrrolidone of 1.2g, the H of 5ml mass fraction are 30% 2 o 2 The solution was mixed with an appropriate amount of deionized water, and magnetically stirred to obtain a 40ml uniformly mixed solution.

[0045] The obtained mixed solution was transferred to a polytetrafluoroethylene-lined stainless steel autoclave, sealed, and reacted at 180°C for 12 hours. After the reaction was completed, it was naturally cooled to room temperature, centrifuged, washed, and dried to obtain a precursor material; The precursor material of the ZnSnO 3 Nanoparticle cluster materials.

[0046] ZnSnO 3 The nanoparticle cluster material was added to deionized water and ground to form a paste, and then the paste was evenly coated on the outer surface of the gas sensor substrate, and the gold electrode was completely covered, and ...

Embodiment 2

[0050] At room temperature, 2.1g of SnCl 4 ·5H 2 O, 0.44g of Zn(AC) 2 2H 2 The mass fraction of O, the NaOH of 1.5g, the polyvinylpyrrolidone of 1.2g, 5ml are the H of 30% 2 o 2 The solution was mixed with an appropriate amount of deionized water, and magnetically stirred for a period of time to obtain a 40ml homogeneously mixed solution, and a total of 3 parts were obtained.

[0051] The obtained mixed solution was transferred to a polytetrafluoroethylene-lined stainless steel high-pressure reactor, sealed, and reacted at 180°C for 12h, 16h, and 20h respectively. After the reaction was completed, it was naturally cooled to room temperature, centrifuged, washed, and dried to obtain the precursor body material; the obtained precursor material was dried in air at 80°C for 12h, and then naturally cooled to room temperature to obtain ZnSnO 3 Nanoparticle cluster materials.

[0052] ZnSnO 3 The nanoparticle cluster material was added to deionized water and ground to form a p...

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Abstract

The invention belongs to the field of materials, and particularly relates to a CO2 gas-sensitive material for respiratory gas detection and a preparation method thereof. The material is a ZnSnO3 nano-particle cluster material. The preparation method comprises the following steps: (1) dissolving tin salt, zinc salt, sodium hydroxide, polyvinylpyrrolidone and hydrogen peroxide in deionized water, and magnetically stirring at room temperature to obtain a mixed solution; (2) transferring the mixed solution into a stainless steel high-pressure reaction kettle with a polytetrafluoroethylene lining, carrying out sealed reaction, naturally cooling to room temperature after the reaction is finished, centrifuging, washing and drying to obtain a precursor material; and (3) drying the precursor material in air, and then naturally cooling to room temperature to obtain the ZnSnO3 nano-particle cluster material. The the ZnSnO3 nano-particle cluster material is prepared by a hydrothermal method; according to the material, the large specific surface area is obtained, the band gap width of the ZnSnO3 nano material is reduced, the electron mobility is improved, and the preparation method is simple, convenient, safe, low in cost and high in practicability.

Description

technical field [0001] The invention belongs to the field of material processing, and in particular relates to a carbon dioxide gas-sensitive material for respiratory gas detection, a preparation method and an application thereof. Background technique [0002] During human respiration, carbon dioxide (CO 2 ) is the main product of human metabolism. Under normal conditions, the CO exhaled by the human body 2 The concentration is about 4% to 5%, which is 133 times that of the inhaled gas, and the moisture content increases to 15.7 times of the original. Chronic obstructive pulmonary disease is a chronic airway disease of the respiratory system. It has a high incidence rate, is difficult to cure, seriously reduces the quality of life of patients, and will bring a great burden to the family and the society. At the time of onset, the partial pressure of carbon dioxide can reach 54.21±10.48mmHg, and shortness of breath can easily lead to CO 2 The amount of re-inhalation increa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00
CPCG01N27/00
Inventor 张超郑子晨刘可为柴弘枫许开春
Owner YANGZHOU UNIV
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