Development of low-temperature SnO2–Au gas sensors for H2S detection in food freshness monitoring

Tin Oxide (SnO2) is widely used in chemiresistive applications due to its favorable electrical properties, high reliability, and enhanced sensitivity towards various gases. However, its high operating temperature limits its application in energy-efficient and compact modules. This study presents a n...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2024-10, Vol.12 (39), p.15895-15902
Main Authors: Park, Kee-Ryung, Kwon, Jinhyeong, Choi, Hyeunseok
Format: Article
Language:English
Subjects:
Electrical properties
Emissions
Freshness
Gas sensors
Low temperature
Operating temperature
Tin dioxide
Tin oxides
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Summary:Tin Oxide (SnO2) is widely used in chemiresistive applications due to its favorable electrical properties, high reliability, and enhanced sensitivity towards various gases. However, its high operating temperature limits its application in energy-efficient and compact modules. This study presents a novel SnO2–Au 0.5 wt% chemiresistive gas sensor, optimized to operate at a low temperature of 200 °C, with high sensitivity (270.231, Ra/Rg) for 10 ppm H2S gas. The sensor has been integrated into a handheld device to evaluate beef freshness by detecting H2S gas emissions. The results demonstrate the sensor's potential to revolutionize the food industry by providing a quick, reliable, and non-invasive method for assessing meat quality, ensuring food safety, and reducing waste.
ISSN:2050-7526
2050-7534
DOI:10.1039/d4tc02901a