Synergistic Enhancement of Chemiresistive NO2 Gas Sensors Using Nitrogen-Doped Reduced Graphene Oxide (N-rGO) Decorated with Nickel Oxide (NiO) Nanoparticles: Achieving sub-ppb Detection Limit

Sensors, Journal Year: 2025, Volume and Issue: 25(5), P. 1631 - 1631

Published: March 6, 2025

Detecting low nitrogen dioxide concentrations (NO2) is crucial for environmental monitoring. In this paper, we report the synergistic effect of decorating nitrogen-doped reduced graphene oxide (N-rGO) with nickel (NiO) nanoparticles developing highly selective and sensitive chemiresistive NO2 gas sensors. The N-rGO/NiO sensor was synthesized straightforwardly, ensuring uniform decoration NiO on N-rGO surface. Comprehensive characterization using SEM, TEM, XRD, Raman spectroscopy confirmed successful integration revealed key structural morphological features contributing to its enhanced sensing performance. As a result, NiO/N-rGO nanohybrids demonstrate significantly response five orders magnitude higher than that toward (<1 ppm) at 100 °C. Moreover, present device has an outstanding performance, high sensitivity, limit detection ppb). findings pave way integrating these sensors into advanced applications, including monitoring IoT-enabled air quality management systems.

Language: Английский

Oxygen-Vacancy-Rich SnO₂ Nanoparticles Based Ultralow-Power MEMS Sensor for Nitrogen Dioxide Detection

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Language: Английский