Abstract

Iron oxide nanostructures have been studied extensively because of their magnetic, optical, electrical, and catalytic properties. In this work, uniform α-Fe2O3 hollow nanospindles were synthesized through hydrothermal method. The average length and outer diameters of the nanospindles are 300 sand 100 nm, respectively. The hollow spindles’ dimensions can be tailored by varying the treatment duration. A growth mechanism of the α-Fe2O3 hollow nanospindle is discussed. Furthermore, the ethanol-sensing properties of the as-synthesized material are investigated at different gas concentrations (25–300 ppm) and operating temperatures (200–400 °C). The sensing output indicates that the α-Fe2O3 hollow nanospindles are an excellent ethanol-sensing material, which can be developed further for practical application.

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