The effect of pre-pattern on the morphology and growth speed of TiO2 nanotube

► Grating ruling engine was utilized to make pre-patterns on the surface of Ti sheet. ► Growth speeds of the TiO2 nanotube on the Ti sheets with pretreatments were accelerated. ► A novel wall structure which increased the surface-to-volume ratio was formed. ► The method maybe useful in the further optimization of fast growth of TiO2 nanotube. ► The wall structure has potentials in improving the efficiency of dye-sensitized solar cell and photocatalysis.