| 초록 |
The need to detect a CO2 gas is greatly increase with a growth of environmental concerns. A BaSnO3 (barium stannate) is a promising material to detect the CO2 with a large detecting range. A BaSnO3 nanofiber sensor was successfully fabricated via electrospinning. By introducing a nanoscale, we can obtain a crystallization temperature reduction and a high specific surface area. Significant sensitivity was obtained when sensor was exposed to 10,000 ppm CO2 at 350℃ due to a high specific surface area. The maximum sensitivity was reached to 1.95. However, a recovery and a response time take 60 sec and 150 sec respectively. To reduce a recovery and a response time, adding dopants to form a p-n junction will be performed in a future work. The characterizations of the BaSnO3 were done by X-ray diffraction spectroscopy (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and UV-vis spectroscopy. |
