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    A silver nanoparticle-anchored UiO-66(Zr) metal-organic framework (MOF)-based capacitive H2S gas sensor

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    Name:
    CE-ART-08-2019-001323.R1.pdf
    Size:
    1.453Mb
    Format:
    PDF
    Description:
    Accepted manuscript
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    Type
    Article
    Authors
    Surya, Sandeep Goud
    Bhanoth, Sreenu cc
    Majhi, Sanjit Manohar
    More, Yogeshwar D.
    Teja, V. Mani
    Chappanda, K. N. cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Physical Science and Engineering (PSE) Division
    Sensors Lab, Advanced Membranes and Porous Materials Center, Computer, Electrical and Mathematical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST) Saudi Arabia
    Date
    2019
    Embargo End Date
    2020-11-01
    Permanent link to this record
    http://hdl.handle.net/10754/660564
    
    Metadata
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    Abstract
    Hydrogen sulfide (H2S) is a highly poisonous gas; if present in a workplace, it must be identified immediately at concentrations greater than 10 ppm. Although there are numerous reports on sensing H2S gas using various techniques and approaches, there still exists a gap in terms of the limit of detection (LOD) and feasibility. In this work, we demonstrated capacitive H2S sensing for the first time using metal-organic frameworks (MOFs) decorated with silver oxide (Ag2O) nanoparticles as the sensing materials. The nanoparticles were deposited on three MOFs (UiO-66(Zr) BDC, UiO-66(Zr) BDC-NO2, and UiO-66(Zr) BDC-N3) using the impregnation technique. The sensing materials were characterized for morphology using X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy techniques. The synthesized MOFs were coated on interdigitated electrode capacitors as the dielectric materials and a comparison of their sensing properties was presented; among them, UiO-66(Zr) BDC-NO2 loaded with Ag2O showed the highest sensitivity towards H2S. The optimized MOF-Ag2O composite demonstrated experimental LOD of 1 ppm of H2S at room temperature, showing high chemical absorption affinity towards H2S. The work presented here is promising for developing sensitive H2S sensors and in addition paves the way to explore and develop other possible MOF-based composite materials for gas sensing applications.
    Citation
    Surya, S. G., Bhanoth, S., Majhi, S. M., More, Y. D., Teja, V. M., & Chappanda, K. N. (2019). A silver nanoparticle-anchored UiO-66(Zr) metal–organic framework (MOF)-based capacitive H2S gas sensor. CrystEngComm, 21(47), 7303–7312. doi:10.1039/c9ce01323g
    Sponsors
    Dr. Bhanoth Sreenu acknowledges DST-SERB Govt. of India and Indian Institute of Science Education and Research Pune as well as Dr. Sujit Kumar Ghosh for providing N-PDF research (PDF-2016003537) funding and facility at IISER, Pune
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    CrystEngComm
    DOI
    10.1039/c9ce01323g
    Additional Links
    http://xlink.rsc.org/?DOI=C9CE01323G
    ae974a485f413a2113503eed53cd6c53
    10.1039/c9ce01323g
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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