A review on resistive-based gas sensors for the detection of volatile organic compounds using metal-oxide nanostructures

The presence of toxic and harmful gases utterly dangers human health and environmental well-being. Selective detection of these gases is immediately required to meet the demands of society. A promising and presently thriving area for monitoring volatile organic compounds (VOCs) and combustible gases stems from the evolution of detection strategies meld with metal-oxide-based nano-materials. Even though the prevailing literature in nanoscience covers numerous reports on chemical sensing merged with nanotechnology, a few have focused on gas detection. This review takes the lead to study, categorize, and inspect the progressive gas detection approaches accessible in literature. Each gas sensing technique is analyzed based on the detection principle and is reviewed on various aspects such as gas detection, sensitivity, response /recovery time, sensor parameters, procedural complexity, detection variables, and sensor characteristics. Furthermore, this investigation serves as a valuable reference for researchers to recognize the mechanism behind the gas sensor's fundamental facets. Concisely, this review elucidates the state of this field and induces/propels further research in this field.

Automated summary

The presence of toxic and harmful gases pose serious threats to human health and the environment. Selective detection of these gases, using metal-oxide-based nano-materials, is becoming increasingly important. While there is a thriving area for monitoring VOCs and combustible gases, research in gas detection is still relatively limited.