Hydrogen sulfide gas sensitive, preparation, and method for making hydrogen sulfide gas sensitive device

A technology of hydrogen sulfide gas and nanocomposite materials, which is applied in the field of metal oxide semiconductor gas sensors, can solve the problems that have not yet been commercialized, and achieve the effects of low working temperature, short response time and good selectivity

Inactive Publication Date: 2009-07-29
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As for the hydrogen sulfide 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

[0036] 1. Composite nano powder SnO 2 -TiO 2 preparation of

[0037] TiO 2 The powder is prepared by the sol-gel method. The basic process is as follows: Take 10ml of n-butyl titanate and stir vigorously, slowly add 20ml of absolute ethanol and 6ml of glacial acetic acid, and continue to stir for a period of time to completely mix to obtain a transparent solution A ;Mix 3ml of deionized water and 10ml of absolute ethanol to obtain solution B; gradually add solution B to transparent solution A under stirring conditions to obtain colorless and transparent solution C, and put colorless and transparent solution C at 60°C Water bath for 15 minutes to obtain a light yellow clear and transparent gel; after sealing the obtained gel for 24 hours, dry it in a drying oven at 100°C for 6 hours to obtain a light yellow xerogel; grind to obtain TiO 2 powder.

[0038] SnO 2 The powder is prepared by the co-precipitation method, the basic process is as follows: the SnCl 4 ·5H 2 O is co...

Embodiment 2

[0042] 1. Composite nano powder SnO 2 -TiO 2 preparation of

[0043] TiO 2The powder is prepared by the sol-gel method. The basic process is as follows: Take 15ml of n-butyl titanate and stir vigorously, slowly add 20ml of absolute ethanol and 6ml of glacial acetic acid, continue to stir for a while to mix completely, and obtain a transparent solution A ;Mix 5ml of deionized water and 10ml of absolute ethanol to obtain solution B; gradually add solution B to transparent solution A under stirring conditions to obtain colorless and transparent solution C, and put colorless and transparent solution C at 60°C Water bath for 20 minutes to obtain a light yellow clear and transparent gel; after sealing the obtained gel for 24 hours, dry it in a drying oven at 120°C for 4 hours to obtain a light yellow xerogel and grind to obtain TiO 2 powder;

[0044] SnO 2 The powder is prepared by the co-precipitation method, the basic process is as follows: the SnCl 4 ·5H 2 O is configured ...

Embodiment 3

[0048] 1. Composite nano powder SnO 2 -TiO 2 preparation of

[0049] TiO 2 The powder is prepared by the sol-gel method, and the basic process is as follows: take 6ml of n-butyl titanate and stir vigorously, slowly add 20ml of absolute ethanol and 6ml of glacial acetic acid, continue to stir for a period of time to completely mix, and obtain a transparent solution A ;Mix 3ml of deionized water and 10ml of absolute ethanol to obtain solution B; gradually add solution B to transparent solution A under stirring conditions to obtain colorless and transparent solution C, and put colorless and transparent solution C at 60°C Water bath for 8 minutes to obtain a light yellow clear and transparent gel; after sealing the obtained gel for 24 hours, dry it in a drying oven at 80°C for 8 hours to obtain a light yellow xerogel, and grind it to obtain TiO 2 powder;

[0050] SnO 2 The powder is prepared by the co-precipitation method, the basic process is as follows: the SnCl 4 ·5H 2 O...

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Abstract

The invention relates to a hydrogen sulfide gas-sensing material and preparation thereof as well as a method for manufacturing hydrogen sulfide gas-sensing devices, comprising: SnO2 powder and TiO2 powder are mixed according to the molar ratio of 6-10: 1 for obtaining SnO2-TiO2 nano-composite material; Pb(NO3)2 or AgNO3 is added and then fine grinded; the hydrogen sulfide gas-sensing material is regulated into a paste shape by using anhydrous ethanol and polyethylene glycol, and then evenly coated on the surface of an electrode tube; by annealing processing, a gas-sensing electrode tube is obtained; finally, the gas-sensing electrode tube is welded, electrically aged, and packaged according to a heater type structure traditional technology for manufacturing the hydrogen sulfide gas-sensing device. Compared with the prior art, the invention has the advantages that the hydrogen sulfide gas-sensing material has the quantum effect of the nano material, self-catalytic activity, surface effect, and the like, and also has high sensitivity to the hydrogen sulfide gas, high resolution, good choosing performance, short response time, and low operating temperature as a novel gas-sensing material.

Description

technical field [0001] The invention relates to a hydrogen sulfide gas-sensing material and its preparation and a method for manufacturing a hydrogen sulfide gas-sensing device, belonging to the technical field of metal oxide semiconductor gas-sensing elements. Background technique [0002] Hydrogen sulfide is one of the main pollutants in the atmosphere, and the hydrogen sulfide discharged into the atmosphere around the world is about 100 million tons every year. Man-made at least 3 million tons, the main source is steelmaking, ironmaking, oil refining, pharmaceuticals, leather, paper and other production processes, oil wells, sewers, coal mines, biogas digesters will also produce hydrogen sulfide gas. Hydrogen sulfide is highly poisonous, a strong nervous and asphyxiating gas, 0.1% to 0.15% hydrogen sulfide can cause death, hydrogen sulfide can seriously corrode various equipment, and has become one of the typical public hazards. Therefore, the detection of hydrogen sulfi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12C01G23/053C01G19/02
Inventor 林志东张宏陈高峰周寻徐杰杜楠轩宋谢清
Owner WUHAN INSTITUTE OF TECHNOLOGY
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