Microporous Elastomer Filter Coated with Metal Organic Frameworks for Improved Selectivity and Stability of Metal Oxide Gas Sensors

Kyoungjin Hwang; Junseong Ahn; Incheol Cho; Kyungnam Kang; Kyuyoung Kim; Jungrak Choi; Kyriaki Polychronopoulou; Inkyu Park

doi:10.1021/acsami.0c00143

Microporous Elastomer Filter Coated with Metal Organic Frameworks for Improved Selectivity and Stability of Metal Oxide Gas Sensors

Kyoungjin Hwang
, Junseong Ahn
, Incheol Cho
, Kyungnam Kang
, Kyuyoung Kim
, Jungrak Choi
, Kyriaki Polychronopoulou
, Inkyu Park

Mechanical & Nuclear Engineering

Department of Industrial and Systems Engineering Korea Advanced Institute of Science and Technology

Research output: Contribution to journal › Article › peer-review

62 Scopus citations

Abstract

Despite various advantages and usefulness of semiconductor metal oxide gas sensors, low selectivity and humidity interference have limited their practical applications. In order to resolve these issues, we propose a new concept of a selective gas filtering structure that increases the gas selectivity and decreases the moisture interference of metal oxide gas sensors by coating metal organic frameworks (MOFs) on a microporous elastomer scaffold. Cu(BTC) with an excellent selective adsorption capacity for carbon monoxide (CO) compared to hydrogen (H₂) and MIL-160 with an excellent moisture adsorption capacity were uniformly coated on the microporous polydimethylsiloxane (PDMS) structure through a squeeze coating method, resulting in a high content of MOFs with a large effective surface area. A Cu(BTC)-coated microporous PDMS filter showed an excellent adsorption efficiency (62.4%) for CO, thereby dramatically improving the selectivity of H₂/CO by up to 2.6 times. In addition, an MIL-160 coated microporous PDMS filter showed a high moisture adsorption efficiency (76.2%).

Original language	British English
Pages (from-to)	13338-13347
Number of pages	10
Journal	ACS Applied Materials and Interfaces
Volume	12
Issue number	11
DOIs	https://doi.org/10.1021/acsami.0c00143
State	Published - 18 Mar 2020

Keywords

gas filter
metal organic frameworks
metal oxide gas sensor
microporous elastomer
moisture interference

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title = "Microporous Elastomer Filter Coated with Metal Organic Frameworks for Improved Selectivity and Stability of Metal Oxide Gas Sensors",

abstract = "Despite various advantages and usefulness of semiconductor metal oxide gas sensors, low selectivity and humidity interference have limited their practical applications. In order to resolve these issues, we propose a new concept of a selective gas filtering structure that increases the gas selectivity and decreases the moisture interference of metal oxide gas sensors by coating metal organic frameworks (MOFs) on a microporous elastomer scaffold. Cu(BTC) with an excellent selective adsorption capacity for carbon monoxide (CO) compared to hydrogen (H2) and MIL-160 with an excellent moisture adsorption capacity were uniformly coated on the microporous polydimethylsiloxane (PDMS) structure through a squeeze coating method, resulting in a high content of MOFs with a large effective surface area. A Cu(BTC)-coated microporous PDMS filter showed an excellent adsorption efficiency (62.4\%) for CO, thereby dramatically improving the selectivity of H2/CO by up to 2.6 times. In addition, an MIL-160 coated microporous PDMS filter showed a high moisture adsorption efficiency (76.2\%).",

keywords = "gas filter, metal organic frameworks, metal oxide gas sensor, microporous elastomer, moisture interference",

author = "Kyoungjin Hwang and Junseong Ahn and Incheol Cho and Kyungnam Kang and Kyuyoung Kim and Jungrak Choi and Kyriaki Polychronopoulou and Inkyu Park",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (no. 2018R1A2B2004910) and by KUSTAR-KAIST Institute (KKI). Publisher Copyright: Copyright {\textcopyright} 2020 American Chemical Society.",

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AU - Hwang, Kyoungjin

AU - Ahn, Junseong

AU - Cho, Incheol

AU - Kang, Kyungnam

AU - Kim, Kyuyoung

AU - Choi, Jungrak

AU - Polychronopoulou, Kyriaki

AU - Park, Inkyu

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (no. 2018R1A2B2004910) and by KUSTAR-KAIST Institute (KKI). Publisher Copyright: Copyright © 2020 American Chemical Society.

PY - 2020/3/18

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N2 - Despite various advantages and usefulness of semiconductor metal oxide gas sensors, low selectivity and humidity interference have limited their practical applications. In order to resolve these issues, we propose a new concept of a selective gas filtering structure that increases the gas selectivity and decreases the moisture interference of metal oxide gas sensors by coating metal organic frameworks (MOFs) on a microporous elastomer scaffold. Cu(BTC) with an excellent selective adsorption capacity for carbon monoxide (CO) compared to hydrogen (H2) and MIL-160 with an excellent moisture adsorption capacity were uniformly coated on the microporous polydimethylsiloxane (PDMS) structure through a squeeze coating method, resulting in a high content of MOFs with a large effective surface area. A Cu(BTC)-coated microporous PDMS filter showed an excellent adsorption efficiency (62.4%) for CO, thereby dramatically improving the selectivity of H2/CO by up to 2.6 times. In addition, an MIL-160 coated microporous PDMS filter showed a high moisture adsorption efficiency (76.2%).

AB - Despite various advantages and usefulness of semiconductor metal oxide gas sensors, low selectivity and humidity interference have limited their practical applications. In order to resolve these issues, we propose a new concept of a selective gas filtering structure that increases the gas selectivity and decreases the moisture interference of metal oxide gas sensors by coating metal organic frameworks (MOFs) on a microporous elastomer scaffold. Cu(BTC) with an excellent selective adsorption capacity for carbon monoxide (CO) compared to hydrogen (H2) and MIL-160 with an excellent moisture adsorption capacity were uniformly coated on the microporous polydimethylsiloxane (PDMS) structure through a squeeze coating method, resulting in a high content of MOFs with a large effective surface area. A Cu(BTC)-coated microporous PDMS filter showed an excellent adsorption efficiency (62.4%) for CO, thereby dramatically improving the selectivity of H2/CO by up to 2.6 times. In addition, an MIL-160 coated microporous PDMS filter showed a high moisture adsorption efficiency (76.2%).

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Microporous Elastomer Filter Coated with Metal Organic Frameworks for Improved Selectivity and Stability of Metal Oxide Gas Sensors

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