A kind of worm-like tin oxide gas-sensing material and its preparation method and ethanol detection application

A gas-sensitive material, tin oxide technology, applied in tin oxide, nanotechnology for materials and surface science, material resistance, etc., can solve the problems of expensive raw materials, long preparation cycle, and low purity of products, and achieve the preparation method Ease of operation, short response time, and high sensitivity effects

Active Publication Date: 2022-07-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing main preparation methods of tin oxide-based micro-nano structure gas-sensing materials, such as sol-gel method, microemulsion method, co-precipitation method, hydrothermal method, etc., have problems of varying degrees, such as expensive raw materials, and some reagents are toxic. , long preparation cycle, complex steps, low product purity, low yield, high energy consumption, complex instruments, etc.

Method used

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  • A kind of worm-like tin oxide gas-sensing material and its preparation method and ethanol detection application
  • A kind of worm-like tin oxide gas-sensing material and its preparation method and ethanol detection application
  • A kind of worm-like tin oxide gas-sensing material and its preparation method and ethanol detection application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) get 50 milliliters of hydrogen peroxide solution with mass concentration of 30%, add 1 milliliter of concentrated nitric acid to it, add 0.3 gram of tin particles after mixing, and react at 80 ° C for 48 hours;

[0033] (2) the powder obtained in step (1) was collected by centrifugation, washed with deionized water for 3 times, and dried in an oven at 60°C overnight;

[0034] (3) heat treating the powder obtained in step (2) at 300° C. for 2 hours to obtain a worm-like tin oxide gas-sensing material;

[0035] Depend on figure 1 The low magnification scanning electron microscope photo shows that the tin oxide is worm-like and has good dispersion. pass figure 2 It can be seen from the high-magnification scanning electron microscope photo of a single tin oxide particle that the tin oxide particle obtained by the present invention is a worm-like particle composed of a tin oxide lamellar structure, and the tin oxide lamellar structure is composed of tin oxide nanopart...

Embodiment 2

[0037] (1) step (1) with embodiment 1;

[0038] (2) step (2) with embodiment 1;

[0039] (3) heat treatment of the powder obtained in step (2) at 400° C. for 2 hours to obtain a worm-like tin oxide gas-sensing material ( Figure 4 shown).

Embodiment 3

[0041] (1) step (1) with embodiment 1;

[0042] (2) step (2) with embodiment 1;

[0043] (3) heat treatment of the powder obtained in step (2) at 500° C. for 2 hours to obtain a worm-like tin oxide gas-sensing material ( Figure 5 shown).

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Abstract

The invention discloses a worm-like tin oxide gas-sensing material, a preparation method thereof, and an ethanol detection application. The main steps are as follows: placing excess tin particles in a reaction solution composed of hydrogen peroxide and nitric acid, and keeping the temperature at 60-90 DEG C for 3-48 hours; The worm-like tin oxide gas-sensing material is obtained after the powder is separated, washed, dried and then heat-treated. The invention is simple and easy to operate, the preparation process is green and pollution-free, and the cost is low. The obtained worm-like tin oxide particles are well dispersed, a single particle is composed of lamellar structures arranged in parallel, and there are nanoscale gaps between the flakes, and the material has Excellent detection of ethanol gas sensing performance.

Description

technical field [0001] The invention belongs to the technical field of metal oxide gas sensors, and in particular relates to a worm-like tin oxide gas-sensing material and a preparation method and use thereof. Background technique [0002] Ethanol, as a colorless, low-toxic and widely used compound, has a wide range of applications in food, biomedicine, and chemical industries. Although low toxicity is not dangerous, long-term exposure to ethanol gas can make people feel dizzy, sleepy, vision impaired, and in severe cases have difficulty breathing. In addition, drunk driving, as one of the important causes of traffic accidents, seriously threatens people's lives and affects social stability and development. As an effective detection tool, the gas sensor can be used to detect the concentration of ethanol in the exhaled breath of the driver, so as to determine whether the driver is drinking and driving. [0003] Metal oxide semiconductor gas sensors have the advantages of hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/12C01G19/02B82Y30/00B82Y40/00
CPCC01G19/02G01N33/0036B82Y30/00B82Y40/00C01P2004/03C01P2004/30C01P2004/50C01P2004/20C01P2004/64
Inventor 王润卉吴进明
Owner ZHEJIANG UNIV
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