Hydrothermal growth of PX-PbTiO3 nanowires with K2Ti6O13 as precursors

• Published in: Journal of crystal growth Vol. 546; p. 125792
• Main Authors: Yuan, Shutong, Li, Bo, Wang, Jin
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.09.2020; Elsevier BV
• Subjects: A. PbTiO3 nanowires; B. K2Ti6O13 nanowires; C. PVA; Crystal structure; D. Formation mechanism; Heat treatment; Hydrothermal reactions; Lead titanates; Morphology; Nanowires; Perovskites; Precursors; C. PVA; A. PbTiO3 nanowires; B. K2Ti6O13 nanowires; D. Formation mechanism
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/j.jcrysgro.2020.125792

•Morphology-controllable PX-PbTiO3 nanowires are derived from K2Ti6O13 nanowires.•The growth mechanism of PX-PbTiO3 nanowires is the redissolution of K2Ti6O13.•Heat treatment before acid treatment leads to formation of PE-PbTiO3 nanowires. Morphology control is a challenging subject in preparing monocrystalline 1D perovskite structures due to high symmetry of their crystal structure. Herein, we employed K2Ti6O13 as the precursor and demonstrated its effectiveness in synthesizing the PX-PbTiO3 nanowires, which could be transformed into monocrystalline perovskite-type PbTiO3 nanowires by facile heat treatment in air. We studied the impact of hydrothermal reaction parameters such as temperature, reaction duration and surfactant concentration on the phase and morphology of the products. It was shown that the employment of a proper concentration of PVA was necessary to the formation of high-quality PX-PT nanowires. Based on the results of control experiments, a possible mechanism for the formation of PX-PT nanowires was proposed.