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PEDOT was successfully filled in TiO2 nanotubes by a in situ electropolymerization at a constant voltage of 1.8 V.The morphology and structure of TiO2/PEDOT hybrid materials were studied by scanning electron microscopy and UV–Vis diffusion reflection spectroscopy.The possible synthetic progress of the TiO2/PEDOT NRs was proposed.This coaxial nanomaterial exhibits enhanced visible light response and electrochemical cycling performances.