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Methanol sensor based on hollow hexagonal Co3O4 material as well as preparation method and application of methanol sensor

A sensor and gas sensor technology, applied in the direction of analyzing materials, material analysis by electromagnetic means, instruments, etc., can solve problems such as unfavorable wide application, complex synthesis process, etc., and achieve low cost, simple synthesis process, and excellent sensing characteristics. Effect

Active Publication Date: 2021-09-28
西安电子科技大学芜湖研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synthesis process of the hollow three-dimensional structure of the reported structure is complicated, which is not conducive to wide application and needs to be improved.

Method used

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  • Methanol sensor based on hollow hexagonal Co3O4 material as well as preparation method and application of methanol sensor
  • Methanol sensor based on hollow hexagonal Co3O4 material as well as preparation method and application of methanol sensor
  • Methanol sensor based on hollow hexagonal Co3O4 material as well as preparation method and application of methanol sensor

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preparation example Construction

[0046] Based on the hollow hexagram Co provided by the embodiment of the present invention 3 o 4 The preparation method of the methanol sensor of the material comprises:

[0047] By incorporating the hollow hexagram Co 3 o 4 The gas-sensitive material is uniformly coated on the outer surface of the ceramic tube, and the hollow hexagram Co 3 o 4 Methanol gas sensor.

[0048] Such as figure 1 As shown, the embodiment of the present invention based on the hollow hexagram Co 3 o 4 The methanol sensor, preparation method and application of the material comprise the following steps:

[0049] S101, using cobalt nitrate and ammonium fluoride as precursors, and a mixed solution of ethanol and water as solvent, one-step hydrothermal synthesis of hollow hexagram Co 3 o 4 Gas-sensitive materials;

[0050] S102, cleaning the alumina ceramic tube with ethanol, and drying; the prepared hollow hexagram-shaped Co 3 o 4 The gas-sensitive material is ground and mixed with deionized ...

Embodiment 1

[0062] The okra-like Co provided by the invention 3 o 4 The preparation method of the acetone sensor of material comprises:

[0063] (1) Using cobalt nitrate as the metal salt, the mixed solution of ethanol / water as the solvent, and ammonium fluoride as the surfactant, the hollow hexagram Co 3 o 4 Material

[0064] (2) According to the side-heating device synthesis process, the hollow hexagram-based Co 3 o 4 Preparation of methanol sensor.

[0065] The hollow hexagram Co 3 o 4 The contents of chemical reagents in the preparation process of gas-sensitive materials are 2-10g of cobalt nitrate; 8-50g of ammonium fluoride; 5-60mL of ethanol / water mixed solution;

[0066] Another object of the present invention is to provide a hollow hexagram Co 3 o 4 The specific preparation methods of gas-sensitive materials include:

[0067] (1) A certain amount of cobalt nitrate and ammonium fluoride are fully stirred at room temperature and dissolved in a mixed solvent of ethanol an...

Embodiment 2

[0081] The present invention is based on the okra-like Co 3 o 4 The preparation method of the acetone sensor of material comprises:

[0082] Fully stir a certain amount of cobalt nitrate and ammonium fluoride at room temperature, dissolve them in a mixed solvent of ethanol and water to form a homogeneous solution; transfer the above homogeneous solution to a high-pressure reactor with a capacity of 50ml, seal and tighten, put Carry out hydrothermal reaction in an oven; after the hydrothermal reaction is completed, alternately centrifuge the reaction precipitate with ethanol and deionized water at a centrifugal speed of 500-900rpm; dry the centrifuged product in an oven at 60°C overnight; dry the dried product at 500°C Annealed to obtain a hollow hexagram Co 3 o 4 gas sensitive material.

[0083] Will the hollow hexagram Co 3 o 4The material powder is ground with deionized water to form a uniform slurry; a small amount of slurry material is taken and evenly coated on the ...

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Abstract

The invention belongs to the technical field of gas sensor preparation, and discloses a methanol sensor based on a hollow hexagonal Co3O4 material, a preparation method and application. The methanol sensor based on the hollow hexagonal Co3O4 material comprises a platinum lead, a gold electrode, a ceramic tube, a gas sensitive material layer and a nickel-chromium alloy heating coil. The ceramic tube is an aluminum oxide ceramic tube, and the aluminum oxide ceramic tube is provided with two Au electrodes and four Pt leads; the Co3O4 gas sensitive material layer uniformly covers the outer surface of the aluminum oxide ceramic tube; and the nickel-chromium alloy heating coil penetrates through the inner side of the ceramic tube and is used for controlling the working temperature of the gas sensor. According to the invention, the Co3O4 gas sensitive material is successfully synthesized by a one-step hydrothermal method, the synthesis method is simple and is low in cost; ammonium fluoride is used as a structure-directing agent, so that the construction of a hollow three-dimensional structure is achieved, the synthesis method is simple, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of gas sensor preparation, in particular to a hollow hexagram-based Co 3 o 4 Material methanol sensor, preparation method and application. Background technique [0002] Currently: methanol (methanol, CH 3 OH), also known as hydroxymethane, is the simplest saturated monohydric alcohol, a representative volatile organic compound, colorless and transparent, and completely miscible with water. Widely used in factories and laboratories as raw materials for organic synthesis, organic solvents, cleaning agents, etc. But methanol is highly toxic. Industrial alcohol contains about 4% methanol. If criminals use it as edible alcohol to make fake wine, methanol poisoning will occur after drinking. The lethal dose of methanol is about 70ml. The toxicity of methanol has the greatest impact on the nervous system and blood system of the human body. Ingestion through the digestive tract, respiratory tract or skin will ...

Claims

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Application Information

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IPC IPC(8): G01N27/416
CPCG01N27/4162
Inventor 程鹏飞王莹麟党凡许录平刘孟戈姚雪
Owner 西安电子科技大学芜湖研究院
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