NO2 Gas Sensing Characteristics of SnO2 Nanofiber-Based Sensors

Authors: Phan Hong Phuoc, Chu Manh Hung*, Nguyen Van Duy


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.


SnO2, metal oxide, nanofibers, gas sensors, NO2
Pages : 23-27

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