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YSZ-based mixed potential type H2S sensor with inverse spinel type Co2SnO4 as sensitive electrode and preparation method of sensor

A hybrid potential-type, sensitive electrode technology, applied in the direction of sensors, instruments, scientific instruments, etc., can solve the problems of long response recovery time and unsatisfactory rapid detection, and achieve the advantages of simple preparation method, good thermal stability and chemical stability Effect

Active Publication Date: 2020-09-18
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But such H 2 The disadvantage of the S sensor is that the response recovery time is long, which cannot meet the requirements of rapid detection in the medical field.

Method used

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  • YSZ-based mixed potential type H2S sensor with inverse spinel type Co2SnO4 as sensitive electrode and preparation method of sensor
  • YSZ-based mixed potential type H2S sensor with inverse spinel type Co2SnO4 as sensitive electrode and preparation method of sensor
  • YSZ-based mixed potential type H2S sensor with inverse spinel type Co2SnO4 as sensitive electrode and preparation method of sensor

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Embodiment 1

[0039] Co sintered at 1000℃ 2 SnO 4 The material is used as the sensitive electrode material to make H 2 S sensor, its production process is:

[0040] Preparation of Co by hydrothermal method 2 SnO 4 Material, Co sintered at 1000℃ 2 SnO 4 As a sensitive electrode material to make YSZ-based hybrid potential type H 2 S sensor, and test the gas sensitivity of the sensor, the specific process is as follows:

[0041] 1. Make a strip-shaped Pt reference electrode: use Pt paste to make a strip-shaped Pt reference electrode with a size of 0.5mm×2mm and a thickness of 15μm on one end of the upper surface of the YSZ substrate with a length of 2×2mm and a thickness of 0.3mm. A 0.9cm Pt wire was folded in half and glued to the middle of the reference electrode to draw out the electrode lead; then the YSZ substrate was baked under an infrared lamp for 0.8h, and then the YSZ substrate was sintered at a high temperature of 1100°C for 1.2 h to make the Pt slurry Terpineol in it can be effectively ...

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Abstract

The invention relates to a YSZ-based mixed potential type H2S sensor with inverse spinel type Co2SnO4 as a sensitive electrode and a preparation method of the sensor, and belongs to the technical field of gas sensors. The sensor is sequentially composed of an Al2O3 ceramic plate with a Pt heating electrode, a YSZ substrate, a reference electrode and the sensitive electrode. The sensor is characterized in that the reference electrode is strip-shaped Pt, the sensitive electrode is strip-shaped Co2SnO4, the two electrodes are symmetrically distributed at the two ends of the upper surface of the YSZ substrate, and the lower surface of the YSZ substrate and the Al2O3 ceramic plate are bonded together. According to the sensor, YSZ is used as an ion conducting layer, and the reverse spinel type Co2SnO4 with high electrochemical catalytic activity is used as the sensitive electrode, so that the gas-sensitive performance of the H2S sensor is effectively improved. In addition, the sensor can show obvious response value difference on exhaled gases of healthy people and simulated ozostomia patients, and shows important application potential in the aspect of ozostomia diagnosis in medical diagnosis and treatment.

Description

Technical field [0001] The invention belongs to the technical field of gas sensors, and specifically relates to an inverse spinel type Co 2 SnO 4 YSZ-based hybrid potential type H for sensitive electrode 2 The S sensor and its preparation method are mainly used in the detection of bad breath and breath in the medical field. Background technique [0002] People with bad breath may feel embarrassed when talking with others, and this can also cause them to lose confidence in life. In addition, bad breath may be a harbinger of some underlying diseases, such as gingivitis and periodontitis. According to related reports, 80% to 90% of bad breath originates in the oral cavity, and the main reason is that some sulfur-containing amino acids cystine, cysteine, and methionine are broken down into malodorous volatile sulfur compounds (VSC) in the oral cavity. , And hydrogen sulfide is one of the products. In medical diagnosis, hydrogen sulfide can be used as a biomarker to detect bad breat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/08G01N27/12
CPCA61B5/082G01N27/125
Inventor 刘方猛王彩冷卢革宇梁喜双王晨光闫旭
Owner JILIN UNIV
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