Synthesis and gas sensing application of porous CeO2–ZnO hollow fibers using cotton as biotemplates

Abstract Biomorphic pure ZnO and porous CeO 2 –ZnO hollow fibers have been fabricated using cotton as biotemplates. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Brunauer–Emmett–Teller (BET). XRD results indicate that the CeO 2 –ZnO sample is well crystallized and shows a mixed phase of CeO 2 and ZnO. Compared with pure ZnO, the CeO 2 –ZnO sensor exhibits much better response to ethanol with high sensitivity and good selectivity at 260 °C, which is mainly contributed to the increasing of active surface area and gas diffusion.

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