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Zn-doped TiO2 nanofibers shelled with ZnO hierarchical nanoarchitectures have been fabricated\udcombining electrospinning of TiO2 (anatase) nanofibers and metal–organic chemical vapor deposition\ud(MOCVD) of ZnO. The proposed hybrid approach has proven suitable for tailoring both the\udmorphology of the ZnO external shell as well as the crystal structure of the Zn-doped TiO2 core. It has\udbeen found that the Zn dopant is incorporated in calcined electrospun nanofibers without any evidence\udof ZnO aggregates. Effects of different Zn doping levels of Zn-doped TiO2 fibers have been scrutinized\udand morphological, structural, physico-chemical and optical properties evaluated before and after the\udhierarchical growth of the external ZnO shell over the electrospun nanofibers. Moreover, doping\udpromotes the incipient transition from the anatase to rutile phase in the core–shell Zn-doped TiO2–ZnO\udnanostructures at lower temperature than that observed for pure TiO2. Finally, the present core–shell\udhierarchical nanofibers possess a very large surface to volume ratio and exhibit a marked\udcathodoluminescence with a strong UV and visible emission

Core–shell Zn-doped TiO2–ZnO nanofibers fabricated via a combination of electrospinning and metal–organic chemical vapour deposition