센서학회지 (Journal of Sensor Science and Technology)

  • 제32권5호
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  • Pages.290-294
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  • 2023
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  • 1225-5475(pISSN)
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  • 2093-7563(eISSN)
한국센서학회 (The Korean Sensors Society)
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3D 프린팅을 이용한 Pt/Carbon Nanotube composite 기반 전기화학식 황화수소 가스 센서 제작

Fabrication of Pt/Carbon Nanotube Composite Based Electrochemical Hydrogen Sulfide Gas Sensor using 3D Printing

  • Yuntae Ha (Advanced mechatronics R&D Group, Korea Institute of Industry Technology) ;
  • JinBeom Kwon (Advanced mechatronics R&D Group, Korea Institute of Industry Technology) ;
  • Suji Choi (Advanced mechatronics R&D Group, Korea Institute of Industry Technology) ;
  • Daewoong Jung (Advanced mechatronics R&D Group, Korea Institute of Industry Technology)
  • 투고 : 2023.08.09
  • 심사 : 2023.09.04
  • 발행 : 2023.09.30
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초록

Among various types of harmful gases, hydrogen sulfide is a strong toxic gas that is mainly generated during spillage and wastewater treatment at industrial sites. Hydrogen sulfide can irritate the conjunctiva even at low concentrations of less than 10 ppm, cause coughing, paralysis of smell and respiratory failure at a concentration of 100 ppm, and coma and permanent brain loss at concentrations above 1000 ppm. Therefore, rapid detection of hydrogen sulfide among harmful gases is extremely important for our safety, health, and comfortable living environment. Most hydrogen sulfide gas sensors that have been reported are electrical resistive metal oxide-based semiconductor gas sensors that are easy to manufacture and mass-produce and have the advantage of high sensitivity; however, they have low gas selectivity. In contrast, the electrochemical sensor measures the concentration of hydrogen sulfide using an electrochemical reaction between hydrogen sulfide, an electrode, and an electrolyte. Electrochemical sensors have various advantages, including sensitivity, selectivity, fast response time, and the ability to measure room temperature. However, most electrochemical hydrogen sulfide gas sensors depend on imports. Although domestic technologies and products exist, more research is required on their long-term stability and reliability. Therefore, this study includes the processes from electrode material synthesis to sensor fabrication and characteristic evaluation, and introduces the sensor structure design and material selection to improve the sensitivity and selectivity of the sensor. A sensor case was fabricated using a 3D printer, and an Ag reference electrode, and a Pt counter electrode were deposited and applied to a Polytetrafluoroethylene (PTFE) filter using PVD. The working electrode was also deposited on a PTFE filter using vacuum filtration, and an electrochemical hydrogen sulfide gas sensor capable of measuring concentrations as low as 0.6 ppm was developed.

키워드

과제정보

본 논문은 한국생산기술연구원 기본사업 "응급환자의 자가호흡 실시간 모니터링용 휴대용 호흡 센서 구현을 위한 열 대류형 고감도 유량센서 개발 (Kitech UI-23-0012)" 지원으로 수행한 연구입니다. 이 논문은 2020년도 정부(과학기술정보통신부)의 재원으로 연구개발특구진흥재단의 지원을 받아 수행된 연구임(2020-DD-UP-0348). 본 연구는 중소벤처기업부와 소기업기술정보진흥원의 "지역특화산업육성+(R&D, S3268879)"사업의 지원을 받아 수행된 연구결과임.

참고문헌

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