Nanomaterials (Nov 2023)

Bismuth-Based Metal–Organic Framework as a Chemiresistive Sensor for Acetone Gas Detection

  • Ashraf Ali,
  • Yaser E. Greish,
  • Reem H. Alzard,
  • Lamia A. Siddig,
  • Ahmed Alzamly,
  • Naser Qamhieh,
  • Saleh T. Mahmoud

DOI
https://doi.org/10.3390/nano13233041
Journal volume & issue
Vol. 13, no. 23
p. 3041

Abstract

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Analyzing acetone in the exhaled breath as a biomarker has proved to be a non-invasive method to detect diabetes in humans with good accuracy. In this work, a Bi-gallate MOF doped into a chitosan (CS) matrix containing an ionic liquid (IL) was fabricated to detect acetone gas with a low detection limit of 10 ppm at an operating temperature of 60 °C and 5 V operating bias. The sensor recorded the highest response to acetone in comparison to other test gases, proving its high selectivity along with long-term stability and repeatability. The sensor also exhibited ultra-fast response and recovery times of 15 ± 0.25 s and 3 ± 0.1 s, respectively. Moreover, the sensor membrane also exhibited flexibility and ease of fabrication, making it ideal to be employed as a real-time breath analyzer.

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