Abstract
AbstractRod‐like, rhombic, octahedral bipyramid‐shaped, cuboid, and spindle‐like anatase TiO2 nanocrystals samples with part of {101}, {001} and {010} facets exposure were synthesized through a straightforward solvothermal treatment of layered tetratitanate nanobelt colloidal solution precursor. The shape and structural evolutionmechanism of the as‐synthesized anatase TiO2 nanocrystals from the layered tetratitanate nanobelts were investigated by using X‐ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and transmission electron microscope (TEM) and high‐resolution transmission electron microscope (HRTEM). The transformation from the layered tetratitanate nanobelts into the various morphologies anatase TiO2 nanocrystals may experience two stages during the solvothermal process including an in situ topotactic dehydration reaction of the layered tetratitanate nanobelts, and a dissolution‐recrystallization reaction of the nanobelts anatase TiO2 crystals along the different planes. Furthermore, the photocatalytic activity of the various morphologies anatase TiO2 nanocrystals was also investigated and discussed, and compared to the benchmark P25 TiO2 nanocrystals. The results revealed that the {010}‐faceted spindle‐like anatase TiO2 nanocrystals exhibited the most superior photocatalytic activity for the degradation of methylene blue.
Published Version
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