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GO/In2O3 composite nanomaterial and preparation and application thereof

A composite nanomaterial and nanomaterial technology, applied in material resistance, material analysis, material analysis by electromagnetic means, etc., can solve problems such as threats to health, ecosystem damage, environmental pollution, etc., and achieve good gas-sensing performance and cost. Low, increased sensitivity effect

Pending Publication Date: 2021-11-23
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of toxic, harmful, flammable and explosive gases will not only cause environmental pollution and damage to the ecosystem, but also seriously threaten people's health

Method used

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  • GO/In2O3 composite nanomaterial and preparation and application thereof
  • GO/In2O3 composite nanomaterial and preparation and application thereof
  • GO/In2O3 composite nanomaterial and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step 1: Weigh 0.6g graphite powder and put it in a beaker, add 1.0g NaNO 3 , placed in an ice-water bath. Under the condition of stirring, slowly add 35mL of concentrated sulfuric acid, continue to stir for 30min after adding the concentrated sulfuric acid, weigh 3.0g of potassium permanganate, slowly add it into the beaker under the condition of stirring and ice-water bath, and then withdraw Remove the ice-water bath, raise the reaction system to 35°C, and continue to stir for 30 minutes, then slowly add 150mL of deionized water into the system, and purple smoke comes out. After the addition, transfer it to the system at 98°C , and continue to stir for 15min. Slowly add it into 200mL deionized water preheated in advance, and continue to stir, and the product is black at this time. Then add 10mL of hydrogen peroxide, and the product turns into a brownish-yellow liquid. Let stand and cool to room temperature. Centrifugal washing, freeze-drying, and grinding to obtain...

Embodiment 2

[0048] The GO loaded In prepared in Example 1 2 o 3 Nanomaterials are dispersed in deionized water, and then drop-coated on the ceramic tube of the sensor device, so that the material is evenly coated on the surface of the ceramic tube, and then air-dried. Then put the sensor coated with the material on the aging table, and age at 220°C for 10h. Then place the prepared device in the gas-sensing analysis system, test the initial resistance value in the air atmosphere, wait for 1 to 2 minutes to react, and after the resistance value is stable, pass through ethanol gas for detection, wait for 2 to 4 minutes to react, and measure Get the resistance value in the ethanol atmosphere. After the resistance value is stable, open the gas cover, let in the air, and discharge the ethanol gas. The response sensitivity to ethanol gas is expressed by the ratio of the resistance value of the material before and after ethanol adsorption. The test results show that 0.5% GO loaded In 2 o 3 N...

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Abstract

A GO-loaded In2O3 nano material is prepared through a solvothermal method, the material has good sensitivity to ethanol gas detection, the working temperature of indium oxide for ethanol gas detection is reduced, the energy-saving requirement is met to a certain extent, and the service life of a sensing device is prolonged. The gas sensor based on the GO-loaded In2O3 nano material has the advantages that the GO-loaded In2O3 nano material is simple in preparation process, the manufactured sensing device is small in size and low in cost, in addition, the gas sensor based on the GO-loaded In2O3 nano material has good gas-sensitive performance on ethanol detection, 0.5% GO / In2O3 has the highest response value on ethanol at the temperature of 220 DEG C, and the gas sensor has good selectivity, reproducibility, stability and ultralow detection limit, and is fast in response, and the material has important significance for on-site immediate detection of ethanol.

Description

technical field [0001] The invention relates to a graphene oxide (GO) supported In 2 o 3 The nano material, preparation method and application in the field of ethanol detection sensor belong to the technical field of gas sensor. Background technique [0002] With the continuous advancement of social industrialization and urbanization, the discharge of industrial waste gas and automobile exhaust and other pollutants is increasing day by day. The massive discharge of toxic, harmful, flammable and explosive gases will not only cause environmental pollution and damage to the ecosystem, but also seriously threaten people's health. Gas sensor is an important part of chemical sensor. As a low-cost, miniaturized sensing element, it can be used to detect toxic and harmful gases in the air in real time. Gas sensors have been widely used in different fields, including public safety, industrial processes, home security, underground mining, and vehicle environmental pollution and air ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 王素华马祥云王祥科葛宏伟殷冉皓余龙
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)