Synthesis and photocatalytic activity of size-controllable flower like TiO₂ nanosheets

抄録

Size-controllable flower-like TiO₂. superstructure was successfully prepared by simple hydrothermal method from amorphous TiO₂ sphere precursor without any template. The as-prepared samples possess titanate nanosheet structure with high surface area in the range of 290.1 to 350.7 m²g^-1. Upon thermal treatment at 500 ^oC, the titanate nanosheets were converted into anatase TiO₂ with deformation of their structures. The as-prepared flower-like titanate showed high photocatalytic activity for H₂ evolution from water splitting reaction. Moreover, the sample heat treated at 500 ^oC exhibit higher photocatalytic activity than that of commercial TiO₂ anatase powder (ST-01).