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Gas sensor based on core-shell flower-ball-shaped ZnFe2O4 nanometer materials, preparing method and application thereof

A technology of gas sensors and nanomaterials, applied in chemical instruments and methods, nanotechnology for materials and surface science, material resistance, etc., can solve problems such as poor gas sensitivity performance and low latitude structure, and achieve simple methods and high production efficiency. High efficiency and simple operation

Inactive Publication Date: 2015-09-30
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the contrary, only a few documents have reported its gas-sensing performance, and all of them are low-latitude structures, showing poor gas-sensing performance.

Method used

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  • Gas sensor based on core-shell flower-ball-shaped ZnFe2O4 nanometer materials, preparing method and application thereof
  • Gas sensor based on core-shell flower-ball-shaped ZnFe2O4 nanometer materials, preparing method and application thereof
  • Gas sensor based on core-shell flower-ball-shaped ZnFe2O4 nanometer materials, preparing method and application thereof

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Embodiment 1

[0031] Core-shell spherical ZnFe 2 o 4 Nanomaterials are used to make side-heated acetone sensors, and the specific manufacturing process is as follows:

[0032] 1. First add 0.5mmol of Zn(NO 3 ) 2 ·6H 2 O, 1.0mmol of Fe(NO 3 ) 3 9H 2 O and 1.0 mmol of CO(NH 2 ) 2 Dissolve in a mixed solvent composed of 8mL glycerin and 30mL isopropanol in turn, and stir for several minutes under the action of a magnetic stirrer to dissolve all the added experimental drugs.

[0033] 2. Transfer the above solution to a reaction kettle with a capacity of 50mL. After the reaction kettle is tightly closed, place it in an electric heating oven at 180°C to react for 21 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, place the reaction precipitate in a muffle furnace at 450°C for 2 hours, and then wash with 0.5M NH 3 ·H 2 O corrosion for 10 minutes yie...

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Abstract

The invention discloses a gas sensor based on core-shell flower-ball-shaped ZnFe2O4 nanometer materials, a preparing method and application thereof on detecting acetone gas and belongs to the technical field of gas sensors. The sensor comprises an Al2O3 insulating ceramic pipe, a Ni-Cr alloy heating coil and sensitive material films. The outer surface of the Al2O3 insulating ceramic pipe is provided with two discrete annular gold electrodes. The Ni-Cr alloy heating coil penetrates through the inner portion of the Al2O3 insulating ceramic pipe. The sensitive material films coats the outer surface of the Al2O3 insulating ceramic pipe and the annular gold electrodes. The sensitive material films are obtained after core-shell flower-ball-shaped ZnFe2O4 nanometer material coating. The sensor has the advantages of being simple in structure, low in price, low in size and large in production batch, the testing results of air-sensitive features show that the sensor has high sensitivity on acetone and good long-term stability, and important potential application is achieved on detecting and warning of acetone leakage in industrial production.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, in particular to a core-shell flower spherical ZnFe sensor 2 o 4 Nanomaterial gas sensor, preparation method and application in acetone detection. Background technique [0002] Although acetone plays an indispensable role in the industrial production of pesticides, plastics, spray paints, etc., its volatile and flammable characteristics make it very easy to explode when it encounters high temperature or open flame, which has a great impact on the safety of industrial production. hazards. In addition, due to the strong irritant of acetone, people who have been in the acetone atmosphere for a long time will have nausea, dizziness, vomiting, acidosis, and even coma and other adverse symptoms, which will bring great harm to people's health. Therefore, in order to ensure the safety of industrial production and people's health, it is urgent to quickly and accurately alarm and detect acetone gas....

Claims

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Application Information

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IPC IPC(8): G01N27/12B82Y30/00B82Y40/00C01G49/00
Inventor 卢革宇周鑫孙鹏王琛李晓伟胡小龙刘凤敏梁喜双
Owner JILIN UNIV
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