Gas sensitive material, preparation method and application thereof, and gas sensitive sensor element

A technology of gas-sensitive materials and cubes, which is applied in the direction of analyzing materials, material resistance, and material analysis by electromagnetic means.

Pending Publication Date: 2021-09-28
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its detection sensitivity, response time and selectivity need to be further improved.

Method used

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  • Gas sensitive material, preparation method and application thereof, and gas sensitive sensor element
  • Gas sensitive material, preparation method and application thereof, and gas sensitive sensor element
  • Gas sensitive material, preparation method and application thereof, and gas sensitive sensor element

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preparation example Construction

[0045] The present invention also provides a method for preparing the gas-sensitive material described in the above technical solution, comprising the following steps:

[0046] After mixing polyvinylpyrrolidone, potassium ferrocyanide and hydrochloric acid solution, carry out hydrothermal reaction to obtain Prussian blue;

[0047] After mixing the Prussian blue and ethanol, the obtained Prussian blue suspension and sodium hydroxide solution are mixed, and a precipitation reaction is carried out to obtain iron hydroxide with a hollow cubic structure;

[0048] Carrying out the first calcination of the iron hydroxide with the hollow structure to obtain the Fe hydroxide with the hollow cubic structure 2 o 3 ;

[0049] After mixing the reducing agent, chloroauric acid and chloroplatinic acid, a reduction reaction is carried out to obtain an AuPt alloy;

[0050] The Fe of the hollow cubic structure 2 o 3 , AuPt alloy and ethanol are mixed and ultrasonicated to obtain the precur...

Embodiment 1

[0104] Add 3.8g of polyvinylpyrrolidone and 0.11g of potassium ferrocyanide to 50mL of 0.1mol / L hydrochloric acid solution, stir for 30 minutes, then conduct a hydrothermal reaction at 80°C for 24h, cool to room temperature, and centrifuge , to get Prussian blue;

[0105] 15 mg of the Prussian blue was washed several times with deionized water and absolute ethanol in turn, and mixed with 20 mL of absolute ethanol to obtain a Prussian blue suspension;

[0106] Take 10mL of the Prussian blue suspension and mix it with 17mL 0.02mol / L sodium hydroxide solution, rotate and shake for 20 minutes, after centrifugation, wash with deionized water and absolute ethanol several times successively to obtain ferric hydroxide with a hollow cubic structure;

[0107] Calcining the ferric hydroxide with the hollow cubic structure at 300°C for 6 hours with a heating rate of 0.5°C / min to obtain the Fe hydroxide with the hollow cubic structure 2 o 3 ;

[0108] Heat 10mL oleylamine to 110°C, stir...

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Abstract

The invention relates to the technical field of gas sensitive sensor elements, in particular to a gas sensitive material, a preparation method and application thereof and a gas sensitive sensor element. The invention provides the gas sensitive material. The gas sensitive material comprises Fe2O3 with a hollow cubic structure and an AuPt alloy dispersed on the surface of the Fe2O3, and the AuPt alloy is nanoparticles. The gas sensitive material has relatively high detection sensitivity, relatively short response time and relatively good selectivity on trimethylamine.

Description

technical field [0001] The invention relates to the technical field of gas-sensitive sensor elements, in particular to a gas-sensitive material, a preparation method and application thereof, and a gas-sensitive sensor element. Background technique [0002] As an organic amine, trimethylamine is potentially toxic to human body functions, and excessive inhalation or exposure will cause serious harm to the human body. For example, it can cause symptoms such as headache and nausea, or in severe cases cause mucous membrane burns, irritate eyes and respiratory system, etc. Studies have shown that trimethylamine can be used as one of the characteristic gases for evaluating the quality of seafood and fish. Among them, the common Xanthomonas, Serratia and Pseudomonas fluorescens will grow and reproduce in dead fish and seafood products to produce trimethylamine characteristic gas, the concentration of trimethylamine gas is related to the spoilage of fish and seafood degree related....

Claims

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Application Information

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IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 朱永恒沈佳彬朱婧旸刘海泉赵勇
Owner SHANGHAI OCEAN UNIV
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