Abstract
In the present work we report significant enhancement of the photoelectrochemical properties of self- organized TiO2 nanotubes by a combined de-coring of classic nanotubes followed by an appropiate TiCl4 treatment. We show that, except for the expected particle decoration, a key effect of the TiCl4 treatment is that the electron transport characteristics in TiO2 nanotubes can be drastically improved, for example, we observe an enhancement of up to 70% in electron-transport times.