TY - JOUR
T1 - Low-Temperature Operating Black SnO2-Based VOC Sensor Setup
AU - Mahalingappa, Kiran
AU - Pranesh, Gowtham Maralur
AU - Manjunath, Gopinatha Bidarkatte
AU - Mundinamani, Shridhar
AU - Molakkalu Padre, Shilpa
AU - Mishra, Nirankar Nath
AU - Chandrasekhar, Gurumurthy Sangam
N1 - Funding Information:
The author S.M. thanks VGST, Govt. of Karnataka, for the financial support under the SMYSR Programme (ref. letter no. No/VGST/GRD-585/2016-17/2017-18/39 dated April 19, 2018) and Siddaganga Institute of Technology, Tumakuru, for the financial support to procure instruments and chemicals. N.M. thanks Karnataka Council for Technological Upgradation, Govt. of Karnataka (KCTU/R&D/SIT-Nano/2016-17/399).
Publisher Copyright:
© 2021 The Authors. Published by American Chemical Society
PY - 2021/9/7
Y1 - 2021/9/7
N2 - 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.
AB - 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.
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U2 - 10.1021/acsomega.1c03399
DO - 10.1021/acsomega.1c03399
M3 - Article
AN - SCOPUS:85114686819
SN - 2470-1343
VL - 6
SP - 22900
EP - 22908
JO - ACS Omega
JF - ACS Omega
IS - 35
ER -
