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Gas Sensors with Two-Dimensional rGO@COF Composite Materials for Fast NO2 Detection under Room Temperature

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Download Hi-Res ImageDownload to MS-PowerPointCite This:ACS Appl. Mater. Interfaces 2023, 15, 37, 44119-44126
    Functional Nanostructured Materials (including low-D carbon)

    Gas Sensors with Two-Dimensional rGO@COF Composite Materials for Fast NO2 Detection under Room Temperature
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    • Junghoon Choi
      Junghoon Choi
      Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, Singapore
      More by Junghoon Choi
    • Taewoo Kim
      Taewoo Kim
      Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, 291, Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
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    • He Li
      He Li
      Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, Singapore
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    • Hee-Tae Jung
      Hee-Tae Jung
      Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, 291, Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
      More by Hee-Tae Jung
      Orcidhttps://orcid.org/0000-0002-5727-6732
    • Dan Zhao*
      Dan Zhao
      Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, Singapore
      *Email: [email protected]
      More by Dan Zhao
      Orcidhttps://orcid.org/0000-0002-4427-2150
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    ACS Applied Materials & Interfaces

    Cite this: ACS Appl. Mater. Interfaces 2023, 15, 37, 44119–44126
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    https://doi.org/10.1021/acsami.3c10304
    Published September 10, 2023
    Copyright © 2023 American Chemical Society
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    Abstract

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    Covalent organic frameworks (COFs) are attracting increasing interest in various applications due to their ability to capture molecules originating from their highly crystallized porous structures. However, most types of COFs are non-conductive and cannot be directly applied to electronic devices. Herein, we utilize non-conductive COFs in chemiresistor sensors by forming composite structures with conductive reduced graphene oxide (rGO). The composites rGO@COF exhibit low-enough resistance to be measured as chemiresistors, demonstrating enhanced gas sensing performance than pristine rGO. In particular, rGO@COF sensors achieve 2.7 times higher sensitivity toward NO2 and a dramatically reduced response time from 234 to 32 s compared to rGO, which can be attributed to increased surface area and NO2 adsorption energy. Our strategy provides new perspectives for utilizing non-conductive COFs in various electronic applications.

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsami.3c10304.

    • XPS spectra, Raman spectra, and thermogravimetric analysis (TGA) curves of rGO and rGO@COF; elemental analysis of the rGO@COF composite; photo and SEM images of rGO@COF chips; images of electrostatic potentials mapped on the electron density iso-surfaces of NO2, rGO, and BTA–TAPT COF; and initial and final configurations of rGO–NO2, COF–NO2, and rGO@COF–NO2 (PDF)

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    Cited By

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    This article is cited by 2 publications.

    1. Weiyu Zhang, Qihua Sun, Yuqing Zhu, Jun Sun, Zhaofeng Wu, Ning Tian. High-Performance Trimethylamine Sensor Based on an Imine Covalent Organic Framework. ACS Sensors 2024, 9 (6) , 3262-3271. https://doi.org/10.1021/acssensors.4c00613
    2. Yucheng Ou, Liangyu Zhai, Gangqiang Zhu, Weibin Zhang, Xiaoyang Huang, Ouardia Akdim, Lujun Zhu, Junli Nie, Fei Rao, Yu Huang, Xianjin Shi, Jianzhi Gao, Hongbin Lu, Mirabbos Hojamberdiev. Achieving Molecular-Level Selective Detection of Volatile Organic Compounds through a Strong Coupling Effect of Ultrathin Nanosheets and Au Nanoparticles. ACS Sensors 2024, 9 (1) , 139-148. https://doi.org/10.1021/acssensors.3c01777
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    ACS Applied Materials & Interfaces

    Cite this: ACS Appl. Mater. Interfaces 2023, 15, 37, 44119–44126
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acsami.3c10304
    Published September 10, 2023
    Copyright © 2023 American Chemical Society
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