In this work, the SnO2 nanofibers (NFs) were directly synthesized through electrospinning method following the annealing treatment process at 600 °C for 3h. The morphological, compositional of material were characterized using field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX), respectively. The FESEM images of SnO2 NFs shows the typical spider-net like morphology with ∼ 150 nm in diameter. Besides, the EDX spectrum reveals the presence of Sn and O atoms in the synthesized nanofibers. The gas sensing properties of fibers were tested towards NO2 gas as a function concentration within a temperature range of 250 to 450 °C. Under the optimal operating temperature of 350 °C, the SnO2 NF sensors can be detected NO2 gas at low concentration down to 0.015 ppm. These results show its ability for NO2 gas detection in gas sensor application.
