? 2022 Elsevier Ltd and Techna Group S.r.l.Powdered SmFeO3 samples were prepared by hydrothermal method combined with high temperature calcination. The samples' crystal structure was discovered by XRD, their morphology and microstructure were assessed by SEM and TEM, and chemical makeup and valence state were investigated by XPS. These characterizations confirmed that the prepared samples were SmFeO3 microspheres with a perovskite structure. A resistive gas sensor was prepared using it as a sensing material, and its gas sensing performance was tested. Test results show that the SmFeO3 sensor has a higher response (117) to 100 ppm ethylene glycol gas at lower operating temperatures (180 °C). In addition, SmFeO3 sensor offers outstanding repeatability, stability, and selectivity. Hence, SmFeO3 microspheres are a promising ethylene glycol sensor.
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Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province College of Physics and Electronic Engineering Northwest Normal University;
