Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7714328 | International Journal of Hydrogen Energy | 2015 | 9 Pages |
Abstract
Monitoring hydrogen levels in radioactive environments is important in nuclear energy safety and space study because leakage of this gas can cause destructive detonation. Herein, hydrogen gas sensing devices were fabricated by using a simple design of a planar-type structure sensor containing a SnO2 thin film sensitized with microsized Pd islands. In addition, the effects of gamma irradiation on sensor performance were investigated and results revealed that low doses of gamma irradiation had ignorable effect on the sensing performance of the device. However, a relatively high dose of gamma irradiation improved the sensitivity of the device because of oxygen defect generation. The enhancement of hydrogen gas-sensing characteristics was correlated with microstructure and optical characterization. Results show that gamma irradiation induced defects in the SnO2 thin film, controlling the doping level, and thus enhancing the gas-sensing characteristic of the device. The sensor can be used for monitoring hydrogen gas at low concentrations of 50Â ppm-500Â ppm, with fast response and recovery time, making it suitable for potential safety applications in monitoring hydrogen levels in radioactive environments.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Nguyen Van Duy, Trinh Huu Toan, Nguyen Duc Hoa, Nguyen Van Hieu,