Low-Temperature Operating Black SnO2‑Based VOC Sensor Setup

Mahalingappa, Kiran and Pranesh, Gowtham Maralur and Manjunath, G B and Shridhar, M and Shilpa, M P and Mishra, Nirankar and Gurumurthy, S C (2021) Low-Temperature Operating Black SnO2‑Based VOC Sensor Setup. ACS Omega, 6 (35). pp. 22900-22908. ISSN 2470-1343

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Volatile organic compounds (VOCs) are harmful to human beings and animals. VOCs include a carbon compound and its derivatives. VOCs irritate the eyes, ears, and throat, ahigh concentration of VOCs may cause cancer; also, it affects the central nervous system. A concentration below 0.3 mg/m3 is harmless, above which it is harmful to human beings. The present work discusses the detection of harmful VOCs using a lab-made portable device setup. Hydrothermally synthesized tin oxide (SnO2) nanocubes are used as an active material for VOC detection. The SnO2 pellet is prepared using a hydraulic press method and is used in the portable setup. Temperature-dependent VOC detection is carried out using a microheater. An external potential is applied to the microheater, which stimulates the active material to sense ethanol at 40 °C. SnO2 and EA deposited on graphite interdigitated electrodes projected on cellulose are used to detect isopropanol, ethanol, and acetone at room temperature. Temperature-dependent studies on acetone are carried out. A significant change in the current levels is observed for different VOCs. A positive shift in the Dirac point is noticed upon VOC exposure. The developed portable device plays a vital role in analyzing sensors based on various active materials for VOC detection.

Item Type: Article
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 03 Mar 2022 09:15
Last Modified: 03 Mar 2022 09:15
URI: http://eprints.manipal.edu/id/eprint/158401

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