Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Review of Metal Oxide-based Formaldehyde Gas Sensor to Measure Indoor Air Quality

실내 대기질 진단을 위한 금속산화물 기반 폼알데하이드 가스센서 연구 동향

  • Kim, Yoon Hwa (Wearable Platform Materials Technology Center, Korea Advanced Institute of Science and Technology) ;
  • Koo, Won-Tae (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Jang, Ji-Soo (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Il-Doo (Wearable Platform Materials Technology Center, Korea Advanced Institute of Science and Technology)
  • 김윤화 (한국과학기술원 웨어러블 플랫폼 소재 기술센터) ;
  • 구원태 (한국과학기술원 신소재공학과) ;
  • 장지수 (한국과학기술원 신소재공학과) ;
  • 김일두 (한국과학기술원 웨어러블 플랫폼 소재 기술센터)
  • Received : 2019.11.01
  • Accepted : 2019.11.20
  • Published : 2019.11.30
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Abstract

People currently spend more than 80% of their time indoors; therefore, the management of indoor air quality has become an important issue. The contamination of indoor air can cause sick house syndrome and various environmental diseases such as atopy and nephropathy. Formaldehyde gas, which is the main contaminant of indoor air, is lethal even with microscopic exposure; however, it is commonly used as an adhesive and waterproofing agent for indoor building materials. Therefore, there is a need for a gas sensor capable of detecting trace amounts of formaldehyde gas. In this review, we summarize recent studies on metal oxide-based semiconductor gas sensors for formaldehyde gas detection, methods to improve the gas-sensing properties of metal oxides of various dimensions, and the effects of catalysts for the detection of parts-per-billion level gases. Through this, we discuss the necessary characteristics of the metal oxidebased semiconductors for gas sensors for the development of next-generation sensors.

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