The traditional hydrothermal method for synthesis of H 2 Ti 3 O 7 nanotubes was modified, and the total hydrothermal reaction time of forming a matured network of H 2 Ti 3 O 7 nanotubes was successfully decreased by 50%. The effect of hydrothermal reaction time on morphology and photocatalytic activity of H 2 Ti 3 O 7 nanotubes was investigated and discussed. Various morphologies can be observed in the as-prepared samples with different hydrothermal reaction times. The photocatalytic activity of the as-prepared samples was evaluated for degradation of methyl orange (MO) under simulated solar irradiation. It was found that the sample treated in the hydrothermal condition for 36 h with a matured network of H 2 Ti 3 O 7 nanotubes showed excellent photocatalytic activity. The photocatalytic activity results were discussed in detail. The stronger absorption in the ultraviolet (UV) range, the increasing crystallization of H 2 Ti 3 O 7 phase, and larger surface area and pore volume contributed to the enhancement of photocatalytic activity of the as-prepared samples.
- Hydrothermal process
- Photocatalytic degradation