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Inverse spinel co 2 sno 4 ysz-based hybrid potential type h for sensitive electrodes 2 s sensor and its preparation method

A hybrid potential type, sensitive electrode technology, used in sensors, instruments, scientific instruments, etc., can solve the problems of long response recovery time, inability to meet rapid detection, etc., and achieve a simple preparation method, good thermal stability and chemical stability. Effect

Active Publication Date: 2021-09-24
JILIN UNIV
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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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  • Inverse spinel co <sub>2</sub> sno <sub>4</sub> ysz-based hybrid potential type h for sensitive electrodes <sub>2</sub> s sensor and its preparation method
  • Inverse spinel co <sub>2</sub> sno <sub>4</sub> ysz-based hybrid potential type h for sensitive electrodes <sub>2</sub> s sensor and its preparation method
  • Inverse spinel co <sub>2</sub> sno <sub>4</sub> ysz-based hybrid potential type h for sensitive electrodes <sub>2</sub> s sensor and its preparation method

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Embodiment 1

[0039] Co sintered at 1000°C 2 SnO 4 material as a sensitive electrode material, making H 2 S sensor, its production process is:

[0040] Preparation of Co by hydrothermal method 2 SnO 4 material, the 1000°C sintered Co 2 SnO 4 Fabrication of YSZ-based hybrid potential type H as a sensitive electrode material 2 S sensor, and test the gas sensitivity performance 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 and width 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 lead out the electrode leads; then the YSZ substrate was baked under an infrared lamp for 0.8h, and then the YSZ substrate was sintered at 1100°C for 1.2h to make the Pt paste The terpineol in it can vol...

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Abstract

An inverse spinel Co 2 SnO 4 YSZ-based mixed potential type H for sensitive electrodes 2 An S sensor and a preparation method thereof belong to the technical field of gas sensors. The sensor in turn consists of an Al with a Pt heating electrode 2 o 3 Composed of ceramic plate, YSZ substrate, reference electrode and sensitive electrode. It is characterized in that: the reference electrode is strip-shaped Pt, and the sensitive electrode is strip-shaped Co 2 SnO 4 , two electrodes are symmetrically distributed on both ends of the upper surface of the YSZ substrate, and the lower surface of the YSZ substrate is connected with Al 2 o 3 The ceramic plates are bonded together. In the present invention, YSZ is used as the ion-conducting layer, and the inverse spinel-type Co with high electrochemical catalytic activity is utilized 2 SnO 4 As a sensitive electrode, it effectively improves the H 2 The gas sensing performance of the S sensor. In addition, the sensor can show a significant difference in response to the exhaled breath of healthy people and simulated halitosis patients, showing important application potential in the diagnosis of halitosis in medical diagnosis and treatment.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, in particular to an inverse spinel-type Co 2 SnO 4 YSZ-based mixed potential type H for sensitive electrodes 2 An S sensor and a preparation method thereof, the sensor is mainly used in the detection of bad breath breath in the medical field. Background technique [0002] Sufferers of bad breath may feel awkward talking to others, which can also cause them to lose confidence in life. In addition, bad breath may be a harbinger of some underlying diseases, such as gingivitis, periodontitis, etc. According to relevant reports, it has been confirmed that 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 will be decomposed into malodorous volatile sulfur compounds (VSC) in the oral cavity. , and hydrogen sulfide is one of the products. In terms of medical diagnosis, hydrogen sulfide can be u...

Claims

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Application Information

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Patent Type & Authority Patents(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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