Preparation of titania nanotape array and its photocatalytic property Original Research Article

A TiO2 nanotape array was fabricated by a seed-induced hydrothermal method without using any template. The TiO2 nanotape with an average width of about 60 nm was grown as a columnar structure with a height of 7 μm on Ti substrate. It was highly porous and robust structure due to the formation of 3D-network among the individual nanotapes. No sodium contamination was found in this TiO2 within the detection level of the energy-dispersive X-ray (EDX) analysis. The X-ray diffraction (XRD) patterns indicate that the TiO2 nanotape array is highly crystallized anatase phase. The fabricated TiO2 nanotape array demonstrated a high photocatalytic activity: its activity was 1.41 times that of the commercial Degussa P25 in evolving CO2 from the decomposition of gaseous 2-propanol.