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Hydrogen sulfide sensor based on Cu7S4-CuO hierarchical structure micron flower sensitive material and preparation method thereof

A hydrogen sulfide sensor and sensitive material technology, applied in the analysis of materials, copper sulfide, material resistance, etc., can solve problems such as accumulation, achieve broad application prospects, simple device technology, and improve sensitivity

Active Publication Date: 2021-06-29
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, hydrogen sulfide can also be produced at organic dump sites, which can easily accumulate in poorly ventilated urban sewage pipes and other types of fermenters and vegetables

Method used

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  • Hydrogen sulfide sensor based on Cu7S4-CuO hierarchical structure micron flower sensitive material and preparation method thereof
  • Hydrogen sulfide sensor based on Cu7S4-CuO hierarchical structure micron flower sensitive material and preparation method thereof
  • Hydrogen sulfide sensor based on Cu7S4-CuO hierarchical structure micron flower sensitive material and preparation method thereof

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Experimental program
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Embodiment 1

[0050] with Cu 7 S 4 - Hydrogen sulfide gas sensor of CuO graded structure micron flower sensitive material, specific manufacturing process:

[0051] (1) First measure 20mL of deionized water and pour it into a beaker;

[0052] (2) 1.08g Cu(CH 3 COO) 2 and NH with a mass fraction of 25% 3 ·H 2 O (6.82mL) was added to the beaker of deionized water in step (1); after stirring for 15 minutes to completely dissolve, 0.11g of thioacetamide (TAA) was added, and after stirring for 30 minutes, 0.71g of hydroxide sodium, and keep stirring constantly until it is all dissolved;

[0053] (3) Transfer the solution obtained in step (2) to a hydrothermal kettle, keep it at 180°C for 24 hours, take it out, cool it down to room temperature naturally, and wash the resulting precipitate with deionized water and ethanol several times by centrifugation. After drying at room temperature, Cu 7 S 4 -CuO hierarchical structure micron flower sensitive material.

[0054] (4) Take an appropriat...

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Abstract

The invention discloses a hydrogen sulfide sensor based on a Cu7S4-CuO hierarchical structure micron flower sensitive material and a preparation method thereof, and belongs to the technical field of semiconductor oxide gas sensors. The sensor structure adopted by the invention consists of a commercially available Al2O3 insulating ceramic tube with two annular gold electrodes, a semiconductor sensitive material coated on the annular gold electrodes and the Al2O3 insulating ceramic tube, and a nichrome heating coil penetrating through the Al2O3 insulating ceramic tube. According to the invention, thioacetamide is utilized to synthesize the Cu7S4-CuO hierarchical structure microflower semiconductor sensitive material, so that a great leap of the gas sensitive characteristic is realized. The sensor shows excellent selectivity, high sensitivity (156-50ppm) and low detection lower limit (1.8-50ppb) on hydrogen sulfide, and has better long-term stability and fast response recovery time. The device disclosed by the invention is simple in process, small in size and suitable for mass production, and has a wide application prospect in the aspect of detecting hydrogen sulfide pollutants.

Description

technical field [0001] The invention belongs to the technical field of semiconductor metal oxide gas sensors, in particular to a Cu-based 7 S 4 - Hydrogen sulfide sensor of CuO hierarchical structure micron flower sensitive material and its preparation method. Background technique [0002] Hydrogen sulfide (H 2 S) is a neurotoxic gas, extremely irritating, and may cause asphyxiation, and its toxicity is equivalent to cyanide. h 2 In addition to acting on the nervous system and respiratory system, S may also cause organ damage. The gas is readily released from industrial production of oil, coal and natural gas. In addition, hydrogen sulfide can also be produced at organic dumps, which can easily accumulate in poorly ventilated urban sewage pipes and other types of fermenters and vegetables. long-term exposure to H 2 S gas can damage the central nervous system and respiratory system. The American Conference of Governmental Industrial Hygienists determined that exposure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12C01G3/12C01G3/02
CPCG01N27/125G01N27/128C01G3/12C01G3/02C01P2004/30C01P2004/03C01P2004/80C01P2002/72C01P2004/04
Inventor 孙鹏王娜卢革宇刘方猛闫旭王晨光贾晓腾刘晓敏
Owner JILIN UNIV
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