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Benzene gas sensitive material and preparation method thereof as well as manufacturing method of benzene gas sensitive device

A benzene gas sensing and benzene gas technology, which is applied in the direction of electrochemical variables of materials, tin oxide, etc., can solve the problems of not yet commercialized, and achieve the effects of low working temperature, fast response-recovery, and high benzene sensitivity

Inactive Publication Date: 2015-05-20
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As for the benzene gas sensor, it is in the stage of exploration and research in China, and has not yet been commercialized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Manufacturing process of benzene gas sensitive material and benzene gas sensor:

[0034] Weigh 3.5060g of SnCl 4 ·5H 2 O is configured into a 0.1mol / L solution, and then 6.8458g of sucrose is added to it, and sucrose and SnCl 4 ·5H 2 The molar ratio of O is 2, and the solution is mixed evenly under stirring conditions. Transfer the mixed solution to a reaction kettle, gradually raise the temperature to 180° C., and keep the temperature for 12 hours. After the hydrothermal reaction, the reaction product was filtered by suction and washed several times (with AgNO 3 Solution detection without residual Cl -), dried at 80°C at low temperature, and finally sintered at 450°C for 3 hours to obtain the matrix coral-like tetragonal SnO 2 Nano powder.

[0035] Weigh 1g of the matrix coral-like tetragonal SnO obtained above 2 Nano powder and 0.0190g Ce(NO 3 ) 3 , for fine grinding, that is, to obtain a doping mass ratio of 1% (cerium nitrate will be decomposed into CeO af...

Embodiment 2

[0040] Manufacturing process of benzene gas sensitive material and benzene gas sensor:

[0041] Weigh 35.06kg of SnCl 4 ·5H 2 O is configured into a 1mol / L solution, and then 68.46kg of sucrose is added to it, and sucrose and SnCl 4 ·5H 2 The molar ratio of O is 2, weighing 286gCe(NO 3 ) 3 , so that the final CeO 2 accounted for SnO 2 The mass ratio is 1% (cerium nitrate will be decomposed into CeO after sintering 2 , according to Ce(NO 3 ) 3 The amount of cerium ion species can be calculated to finally get CeO 2 mass; SnCl 4 ·5H 2 SnO will be generated after the hydrothermal reaction of O 2 , according to SnCl 4 ·5H 2 The amount of Sn in O can be calculated to finally make SnO 2 The mass of CeO can be known from the calculation 2 with SnO 2 The mass ratio is 1%), and the solution is mixed evenly under stirring conditions. Transfer the mixed solution to a reaction kettle, gradually raise the temperature to 180° C., and keep the temperature for 24 hours. Afte...

Embodiment 3

[0046] Manufacturing process of benzene gas sensitive material and benzene gas sensor:

[0047] Weigh 701.20g of SnCl 4 ·5H 2 O is configured into a 0.1mol / L solution, and then 684.58g of sucrose is added to it, and sucrose and SnCl 4 ·5H 2 The molar ratio of O is 1, and the solution is mixed evenly under stirring conditions. Transfer the mixed solution to a reaction kettle, gradually raise the temperature to 200°C, and keep the temperature for 6 hours. After the hydrothermal reaction, the reaction product was filtered by suction and washed several times (with AgNO 3 Solution detection without residual Cl - ), dried at 60 °C at low temperature, and finally sintered at 500 °C for 1 hour to obtain coral-like tetragonal SnO 2 Nano powder.

[0048] Weigh the above obtained 200g matrix coral-like tetragonal SnO 2 Nanopowder and 11.37gCe(NO 3 ) 3 , and finely ground to prepare a benzene gas-sensing material with a doping mass ratio of 3%.

[0049] Take an appropriate amou...

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Abstract

The invention relates to a benzene gas sensitive material and a preparation method thereof as well as a manufacturing method of a benzene gas sensitive device. The preparation method includes: i), preparing substrate coralline SnO2 nano-powder; and ii), doping Ce ions, the doping amount meets the requirement that finally-obtained CeO2 accounts for 0.1-5% of the substrate coralline SnO2 nano-powder in weight percentage. The benzene gas sensitive material and the preparation method thereof as well as the manufacturing method of the benzene gas sensitive device have the advantages that a novel benzene gas sensitive material is provided and has surface effect, quantum effect, self-catalysis activity and the like of the nano material; as a newly-developed gas sensitive material, the benzene gas sensitive material is high in benzene sensitivity, quick in response-restoration and low in working temperature, and meets requirements of benzene gas sensitive sensor devices meeting practical standards.

Description

technical field [0001] The invention relates to a benzene gas-sensing material and a preparation method thereof, and a manufacturing method of a benzene-gas-sensing device, belonging to the technical field of metal oxide semiconductor gas-sensing elements. Background technique [0002] Benzene is one of the main pollutants in industrial production, life and the atmosphere. The weight of benzene and its derivatives discharged into the atmosphere around the world is 50 million tons every year. Man-made at least four million tons, the main sources are steelmaking, oil refining, tanning, papermaking, plastics, fuel, rubber, etc., hidden in paints, additives for various coatings, various adhesives, and waterproof materials. May come from burning fuel and tobacco. Benzene is highly toxic and is a strong carcinogen. If people inhale high concentrations of benzene and its derivatives, such as benzene and toluene, in a short period of time, symptoms of central nervous anesthesia wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26C01G19/02
Inventor 林志东宋文龙郭春亮郭飞钟诚向腾瑞王辰
Owner WUHAN INSTITUTE OF TECHNOLOGY
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