| Title |
Room Temperature Hydrogen Gas Sensor Based on Pd-SnO2 Nanomaterials with Electro-spinning |
| Authors |
(Dongjun Jang) ; (Sangwan Kim) ; (Min-Woo Kwon) |
| DOI |
https://doi.org/10.5573/JSTS.2025.25.6.703 |
| Keywords |
Hydrogen gas sensor; SnO2 nanowires; electro-spinning; Pd nanodots |
| Abstract |
The palladium (Pd) nanodots (NDs)-embedded SnO2 nanowires (NWs) are synthesized to fabricate highly sensitive hydrogen (H2) gas sensors, with a focus on the effect of electrospinning time. The SnO2 NWs are synthesized using the electro-spinning technique for durations of 5, 10, and 20 seconds. The Pd NDs are decorated on the surface of SnO2 via sputtering. The Pd- SnO2 gas sensor of the electro-spinning for 10 seconds demonstrates a low detection concentration range (4-50 ppm), high responsivity (∼ 10), and faster response/recovery times at room temperature. The improved sensing characteristics are attributed to the increased NWs density and the catalytic effects of PdHx formation, along with the Schottky barrier effect. Furthermore, the sensor demonstrates excellent stability and repeatability under ambient conditions (27?C, 31% RH), indicating its practical potential for real-time H2 monitoring in industrial safety and environmental applications. This study highlights the influence of electrospinning duration on the sensitivity and performance of H2 gas sensors. |