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Low-Temperature Operating Black SnO2-Based VOC Sensor Setup
Kiran Mahalingappa1, Gowtham Maralur Pranesh1, Gopinatha Bidarkatte Manjunath1
1Department of Electronics and Communication Engineering, Siddaganga Institute of Technology, B.H. Road (affiliated to Visvesvaraya Technological University, Belagavi), Tumakuru, Karnataka 572103, India.
ACS Omega
|September 13, 2021
Summary
This study presents a portable device for detecting harmful volatile organic compounds (VOCs). Tin oxide nanocubes effectively sense ethanol, isopropanol, and acetone, crucial for environmental and health monitoring.
Area of Science:
- Materials Science
- Environmental Science
- Sensor Technology
Background:
- Volatile organic compounds (VOCs) pose significant health risks, including irritation and potential carcinogenicity.
- Accurate detection of VOCs is critical for public health and environmental safety.
- Existing detection methods may lack portability or sensitivity.
Purpose of the Study:
- To develop and evaluate a portable device for detecting harmful volatile organic compounds (VOCs).
- To utilize hydrothermally synthesized tin oxide (SnO2) nanocubes as the active sensing material.
- To investigate the performance of the device under varying temperature conditions and for different VOCs.
Main Methods:
- Fabrication of tin oxide (SnO2) nanocubes via hydrothermal synthesis.
- Preparation of SnO2 pellets using a hydraulic press for the portable device.
- Utilizing a microheater for temperature-dependent VOC detection.
- Employing graphite interdigitated electrodes on cellulose for room-temperature detection of isopropanol, ethanol, and acetone.
Main Results:
- The portable device demonstrated effective detection of ethanol, isopropanol, and acetone.
- Significant current changes were observed upon exposure to different VOCs.
- Temperature-dependent studies showed distinct responses for acetone.
- A positive shift in the Dirac point indicated VOC presence, confirming sensor functionality.
Conclusions:
- The developed portable device, utilizing SnO2 nanocubes, is a viable tool for VOC detection.
- The sensor exhibits sensitivity to various VOCs at room temperature and under controlled temperatures.
- This technology offers a promising approach for real-time environmental monitoring and health hazard assessment.
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