Efficient synthesis of dendritic PbTiO_3 nanorods by hydrothermal method

摘要

The PbTiO_3 nanorods were synthesized by a hydrothermal method using 4.4 mol/L ammonia solution as the pH-adjusting agent. The influence of Pb/Ti molar ratio in the Pb-Ti precursors, precursor concentration, reaction temperature, and time on formation of PbTiO_3 nanorods was investigated. The dendritic PbTiO_3 nanorods were obtained by controlling the process parameters. The preparation of dendritic PbTiO_3 nanorods mainly involved two steps: in the first step of formation of PbTiO_3 nanorods, the classical nucleation and growth dominates the nanorod growth, and in the second step of formation of dendritic PbTiO_3 nanorods, the oriented attachment dominates the dendritic grain growth. The PbTiO_3 nanorods grew along the [001] c-axis, and the oriented attachment was along the [001] c-axis to form the dendritic PbTiO_3 nanorods.