Abstract
In this study, SnO2–ZnO nanofibers were synthesized by electrospinning and heat treatment. In addition, their structural, morphological, and optical properties were investigated by X-ray diffraction (XRD), SEM, transmission electron microscopy (TEM), and ultraviolet–visible spectrophotometry. Results revealed that the composites exhibit a distinctive nanofibrous shape, which is consistent with that of SnO2–ZnO after high-temperature calcination. Furthermore, the sensing response was optimized by the variation of Sn:Zn ratios and the Au sputtering time. Hence, the heteronanostructure of the SnO2–ZnO composite nanofiber film is doped with Au nanoparticles to investigate the resulting sensitivity to different gases. In addition, the gas-sensing mechanism was discussed.
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