Recent Advances in Electrochemical Sensors for Detecting Toxic Gases: NO₂, SO₂ and H₂S

Sensors
Md Ashfaque Hossain KhanQiliang Li

Abstract

Toxic gases, such as NOx, SOx, H₂S and other S-containing gases, cause numerous harmful effects on human health even at very low gas concentrations. Reliable detection of various gases in low concentration is mandatory in the fields such as industrial plants, environmental monitoring, air quality assurance, automotive technologies and so on. In this paper, the recent advances in electrochemical sensors for toxic gas detections were reviewed and summarized with a focus on NO₂, SO₂ and H₂S gas sensors. The recent progress of the detection of each of these toxic gases was categorized by the highly explored sensing materials over the past few decades. The important sensing performance parameters like sensitivity/response, response and recovery times at certain gas concentration and operating temperature for different sensor materials and structures have been summarized and tabulated to provide a thorough performance comparison. A novel metric, sensitivity per ppm/response time ratio has been calculated for each sensor in order to compare the overall sensing performance on the same reference. It is found that hybrid materials-based sensors exhibit the highest average ratio for NO₂ gas sensing, whereas GaN and metal-oxide based senso...Continue Reading

References

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Citations

Jan 30, 2020·Sensors·Marco SantonicoGiorgio Pennazza
Jun 18, 2020·Frontiers in Chemistry·Erin M McConnellYingfu Li
Jul 17, 2020·Sensors·Md Ashfaque Hossain Khan, Mulpuri V Rao
Nov 12, 2020·Nanomaterials·Mehdi Akbari-SaatluHenry H Radamson
Jan 23, 2021·Sensors·Md Ashfaque Hossain KhanMulpuri V Rao
Apr 4, 2021·Sensors·Heriberto Cruz-MartínezDora I Medina
May 18, 2021·ACS Applied Materials & Interfaces·Jeong Ik LeeYeong Don Park
Jul 7, 2021·Chemical Society Reviews·Erin M McConnellYingfu Li
Dec 7, 2021·ACS Applied Materials & Interfaces·Jin ZhouKrisztian Kordas
Jan 14, 2022·Langmuir : the ACS Journal of Surfaces and Colloids·Tingting ZhangZhiquan Chen

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Methods Mentioned

BETA
transmission electron microscopy
chips
microsensor
surface-enhanced Raman scattering

Software Mentioned

RGB
NASICON

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