Fabrication of ZnO@CeO2 core–shell hetero-structural nanofibers and enhanced gas sensing performance for acetone

ZnO@CeO 2 core–shell hetero-structural nanofibers (NFs) were synthesized by a coaxial electrospinning method and the materials characterization results proved that the core–shell hetero-structure was formed. Furthermore, the sensing properties test indicated that the ZnO@CeO 2 NFs exhibited higher response values and enhanced selectivity to acetone in low concentration range (0.2–10 ppm) compared with ZnO and CeO 2 NFs, which showed the potential value in the field of diabetes diagnose. It is suggested that the enhanced sensitivity to acetone is attributed to the synergistic effect of one-dimensional (1D) structure and the formation of ZnO and CeO 2 hetero-structure.