Synthesis and gas sensing characteristics of LaxSr1−xFeO3 nanofibers via electrospinning

LaxSr1−xFeO3 nanofibers were synthesized via electrospinning and characterized by field-emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD). The diameters of the LaxSr1−xFeO3 nanofibers produced were in the range of 30–80 nm. When the La/Sr ratio was 0.7:0.3, La0.7Sr0.3FeO3 nanofibers showed high and rapid response and good repeatability to 500 ppm ethanol. At 185 °C, the response and recovery time of La0.7Sr0.3FeO3 nanofiber were 11 s and 21 s, respectively. The La0.7Sr0.3FeO3 nanofibers are promising sensitive materials for ethanol detecting.

► We prepared LaxSr1−xFeO3 (x = 0.6, 0.7, 0.8) nanofibers via electrospinning method.
► We fabricated indirect-heating sensors based on the obtained nanofibers.
► We measured gas sensing properties of the LaxSr1−xFeO3 based sensors.
► The La0.7Sr0.3FeO3nanofibers showed good ethanol sensing properties.