Low-Temperature Operating Black SnO2-Based VOC Sensor Setup

This is the authors' abstract. We don't add key points for this paper.

High Resolution Image Download MS PowerPoint Slide 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/m 3 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 (SnO 2 ) nanocubes are used as an active material for VOC detection. The SnO 2 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. SnO 2 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.