Acetone gas sensor based on hollow spherical ZnFe2O4 nano material and preparation method thereof

A technology of gas sensors and nanomaterials, applied in the direction of material resistance, etc., to achieve the effects of high yield, simple method, and good cycle performance

Inactive Publication Date: 2015-04-29
JILIN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] At present, there is no such kind of hollow flower-shaped ZnFe prepared by a simple solvothermal method under the cond

Method used

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  • Acetone gas sensor based on hollow spherical ZnFe2O4 nano material and preparation method thereof
  • Acetone gas sensor based on hollow spherical ZnFe2O4 nano material and preparation method thereof
  • Acetone gas sensor based on hollow spherical ZnFe2O4 nano material and preparation method thereof

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Embodiment

[0034] ZnFe with hollow curd 2 o 4 Nanomaterials are used to make side-heated acetone sensors, and the specific manufacturing process is as follows:

[0035] 1. First add 0.5mmol of Zn(CH 3 COO) 2 2H 2 O and 1.0mmol of Fe(NO 3 ) 3 9H 2 O was sequentially dissolved into a mixed solvent consisting of 8mL glycerin and 30mL isopropanol, and stirred for several minutes under the action of a magnetic stirrer to dissolve all the added experimental drugs.

[0036] 2. Transfer the above solution to a reaction kettle with a capacity of 40mL. After the reaction kettle is tightly closed, place it in an electric heating oven at 180°C for 12 hours, then let the reaction kettle naturally cool to room temperature and separate the obtained precipitates Wash several times with ethanol and deionized water, dry at room temperature, and place the reaction precipitate in a muffle furnace at 400°C for 2 hours to obtain ZnFe nanosheets. 2 o 4 Hollow curd nanomaterials.

[0037] 3. The ZnFe ...

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Abstract

The invention discloses a gas sensor based on a hollow spherical ZnFe2O4 nano material, a preparation method and application of the gas sensor in detection of acetone gas, and belongs to the technical field of gas sensors. The gas sensor consists of an Al2O3 insulating ceramic tube with two discrete annular gold electrodes on the outer surface, an Ni-Cr alloy heating coil penetrating through the Al2O3 insulating ceramic tube and a sensitive material film coated on the outer surface of the Al2O3 insulating ceramic tube and the annular gold electrodes, wherein the sensitive material film is obtained by coating the hollow spherical ZnFe2O4 nano material. The sensor has the advantages of simple structure, low price, small volume, and easiness in integration and large-batch production, and the test results of gas sensitivity show that the sensor has extremely high sensitivity and extremely good long-term stability to acetone, so that the sensor has an important application prospect on the aspect of detection and alarm in acetone leakage in industrial production.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, in particular to a hollow flower ball-shaped ZnFe 2 O 4 Nanomaterial gas sensor, preparation method and application in acetone detection. Background technique [0002] As an important organic synthesis raw material, acetone has been widely used in industrial production such as pesticides, plastics, rubber, medicine, paint and spray paint. Although acetone is indispensable in industrial production, because of its flammable and volatile properties, it is very easy to burn and explode in case of open flame or high temperature, which poses a great threat to the safety of industrial production. In addition, acetone is also strongly irritating. If it is exposed to acetone for a long time, it will have a paralyzing effect on people's central nervous system, resulting in nausea, fatigue, dizziness, pharyngitis, bronchitis, and even coma. Great harm to health. Therefore, in order to ensure the saf...

Claims

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Application Information

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IPC IPC(8): G01N27/12
Inventor 孙鹏周鑫卢革宇李晓伟王琛胡小龙
Owner JILIN UNIV
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