Synthesis and Growth Mechanism of Lead Titanate Nanotube Arrays by Hydrothermal Method

Lead titanate nanotube arrays were in‐situ grown by hydrothermal synthesis. The hydrothermal process is time‐dependent and in different hydrothermal reaction stages, different growth mechanisms dominate the formation of PbTiO ₃ nanotubes. In the initial stage in‐situ growth of PbTiO ₃ nanotube arrays dominates. Subsequently dissolution–precipitation process dominates and results in the deposition of PbTiO ₃ particles on the surface of the already‐formed PbTiO ₃ nanotubes. In order to in‐situ grow PbTiO ₃ nanotube arrays with perfect nanotubular structure, suitable hydrothermal reaction time should be applied.