Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Hydrogen Sulfide Sensing Characteristics Depending on Electrolytes of Pt/CNT Liquid Electrochemical Sensors

Pt/CNT 전극 기반 전기화학식 센서의 전해질에 따른 황화수소 감지 특성

  • Yuntae Ha (Korea Institute of Industry Technology, Advanced mechatronics R&D Group) ;
  • JinBeom Kwon (Korea Institute of Industry Technology, Advanced mechatronics R&D Group) ;
  • Suji Choi (Korea Institute of Industry Technology, Advanced mechatronics R&D Group) ;
  • Soobeen baek (Korea Institute of Industry Technology, Advanced mechatronics R&D Group) ;
  • Daewoong Jung (Korea Institute of Industry Technology, Advanced mechatronics R&D Group)
  • Received : 2023.05.10
  • Accepted : 2023.05.31
  • Published : 2023.05.31
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Abstract

With the recent development of industrial technology, the problem of odor due to leakage of toxic gas discharged from industrial complexes is gradually increasing. Among them, hydrogen sulfide is a colorless representative odorous substance that can cause pain through irritation of the mucous membranes of the eyes and respiratory tract, and is a gas that can cause central nervous system paralysis and suffocation when exposed to high concentrations. Therefore, in order to improve the odor problem, research on a gas sensor capable of quickly and reliably detecting a leak of hydrogen sulfide is being actively conducted. A lot of research has been done on the existing metal oxide-based hydrogen sulfide gas sensor, but it has the disadvantage of requiring low selectivity and high temperature operating conditions. Therefore, in this study, a Pt/CNT-based electrochemical hydrogen sulfide gas sensor capable of detecting at low temperatures with high selectivity for hydrogen sulfide was developed. A working electrode capable of selectively detecting only hydrogen sulfide was fabricated by synthesizing Pt nanoparticles as a catalyst on functionalized CNT and applied to an electrochemical hydrogen sulfide gas sensor. It was confirmed that the manufactured Pt/CNT-based electrochemical hydrogen sulfide gas sensor has a current change of up to 100uA for hydrogen sulfide, and the both response time and recovery time were within 15 seconds.

Keywords

Acknowledgement

이 논문은 2020년도 정부(과학기술정보통신부)의 재원으로 연구개발특구진흥재단의지원을받아수행된연구임(2020-DD-UP-0348). 본 연구는 대한민국 정부(산업통상자원부 및 방위사업청) 재원으로 민군협력진흥원에서 수행하는 민군기술협력사업의 연구비 지원으로 수행되었습니다.(과제번호 21-SF-BR-05) 본논문은한국생산기술연구원기관주요사업 "다중채널(Multichannel) 기반의 광학필터를 적용한 온실 가스(CO, CO2) 감지용비분산적외선(Non-Dispersive Infrared) 센서개발 (Kitech JD-23-0006)"의 지원으로 수행한 연구입니다.

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