Year: 2025
Type: article
Abstract: Monitoring the levels of nitric oxide (NO) and nitrogen dioxide (NO2) are essential for asthma management. This implies the necessity of developing highly sensitive and effective gas sensors. This research studies the development of zinc oxide (ZnO) nanofiber gas sensors comprising of reduced graphene oxide (rGO) for NO and NO2 detection. By using electrospinning and integrating rGO at various percentages (0.055%, 0.11%, and 0.22%) in ZnO nanofibers, the sensors exhibited significantly improved responses. Scanning electron microscopy (SEM) confirmed successful rGO integration. The rGO0.11@ZnO sensor showed the highest performance at 200 °C, with a 40% increase in response compared to pure ZnO sensors. At 1 ppm of NO, this sensor achieved a dynamic response of 51.42, markedly higher than the 20.86 response of the ZnO sensor without rGO. Additionally, rGO incorporation improved response and recovery times by 34% and 54%, respectively. Tests at lower temperatures (50 °C, 100 °C, and 150 °C) demonstrated optimal sensor performance at 150 °C and the highest response of 169.5 with low recovery time of 144 s towards 500 ppb of the NO gas. This highlights the presence of rGO in improving ZnO gas sensors for effective NO and NO2 detection for managing asthma.
Source: Journal of the Textile Institute
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4410173338