Low-Temperature Operating Black SnO2-Based VOC Sensor Setup

Kiran Mahalingappa, Gowtham Maralur Pranesh, Gopinatha Bidarkatte Manjunath, Shridhar Mundinamani, Shilpa Molakkalu Padre, Nirankar Nath Mishra, Gurumurthy Sangam Chandrasekhar

Research output: Contribution to journalArticlepeer-review

Abstract

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/m3is 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 SnO2pellet 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. SnO2and 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.

Original languageEnglish
Pages (from-to)22900-22908
Number of pages9
JournalACS Omega
Volume6
Issue number35
DOIs
Publication statusPublished - 07-09-2021

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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