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Preparation of PbTiO3 nanosheets by two-step hydrothermal method with ammonia as pH-adjusting agent

JIANGLAI YUE1, ZHIXIONG HUANG1, DONGYUN GUO1,* , YANG JU2

Affiliation

  1. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
  2. Department of Mechanical Science and Engineering, Nagoya University, Nagoya 464-8603, Japan

Abstract

The PbTiO3 nanocrystals were synthesized by a two-step hydrothermal method, and ammonia solution was used as a pH-adjusting agent. The effect of ammonia concentration in the second-step Pb-Ti precursors on crystallization and morphologies of PbTiO3 nanocrystals was investigated. The single-phase PbTiO3 nanocrystals were formed by the two-step hydrothermal method at 200 oC for 20 h. As the ammonia concentration in the second-step Pb-Ti precursor ranged from 4.4 to 8.8 mol/L, the single-crystal PbTiO3 nanosheets with thickness of about 45 nm were synthesized, and a few rectangular nanocrystals were also observed. The ferroelectric domains were observed in the PbTiO3 nanocrystals prepared at the ammonia concentration of 4.4 mol/L, which indicated that the PbTiO3 nanocrystals with ferroelectric behavior were formed.

Keywords

PbTiO3 nanocrystal, Two-step hydrothermal method, Ammonia solution, Morphology, Ferroelectric domain.

Citation

JIANGLAI YUE, ZHIXIONG HUANG, DONGYUN GUO, YANG JU, Preparation of PbTiO3 nanosheets by two-step hydrothermal method with ammonia as pH-adjusting agent, Optoelectronics and Advanced Materials - Rapid Communications, 15, 9-10, September-October 2021, pp.504-508 (2021).

Submitted at: Feb. 23, 2021

Accepted at: Oct. 7, 2021