Abstract
A facile electrospinning route was exploited to prepare Sm1-xHoxFeO3 (0 ≤ x ≤ 0.07) nanofibers with orthorhombic perovskite phase. The XRD refinement technique was employed to obtain the lattice parameters of all samples. The characterization results show that the Ho partial substitution on A site ions of SmFeO3 leads to the decrease of crystallite size and increase of porosity, which is beneficial to enhance gas sensing properties of sensors. The Sm0.95Ho0.05FeO3 sensor exhibits the best response (26.12) to 100 ppm glycol at 200 °C among Sm1-xHoxFeO3 sensors. Especially, the as-prepared Sm0.95Ho0.05FeO3 oxides have an ultra-high response value of 10.20 to 5 ppm glycol. Hence the as-prepared Sm0.95Ho0.05FeO3 nanofibers can be regarded as an ultra-sensitive glycol candidate material.
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