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

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number3041
Issue number23
Publication statusPublished - Dec 2023


  • Bi-gallate MOF
  • acetone sensor
  • breath analyzer
  • chitosan

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Materials Science


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