Synthesis of TiO2–polyaniline core–shell nanofibers and their unique UV photoresponse based on different photoconductive mechanisms in oxygen and non-oxygen environments

The TiO2-polyaniline (PANI) core-shell nanofibers with unique ultraviolet (UV) photoresponse were designed and fabricated. When the core-shell nanofibers were tested in an oxygen (O2) and a non-oxygen environment under UV illumination, respectively, a decrease and an increase in photoconduction were observed, which suggested different photoconductive mechanisms of the core-shell materials in different environments.