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<p>Hierarchical perovskite PbTiO<sub>3</sub>-Ag<sub>2</sub>O (H-PTO-Ag<sub>2</sub>O) microplate composites were successfully synthesized by decorating Ag<sub>2</sub>O nanoparticles on the surface of hierarchical PTO microplate (H-PTO) via a facile wet-chemical method. The composite samples were characterized by SEM, XRD, XPS, PL, and UV-Vis techniques. The catalytic activities of the as-prepared H-PTO-Ag<sub>2</sub>O composites were evaluated. And the H-PTO-Ag<sub>2</sub>O-55wt% composite displayed the best photocatalytic activity with 99.1% RhB degraded within 25&#xa0;min under simulated solar light irradiation, exhibiting a kinetic constant of 0.17692&#xa0;min<sup>−1</sup>, 5.8 times higher than that of pure H-PTO (0.03046&#xa0;min<sup>−1</sup>). The remarkable photocatalytic activity of the H-PTO-Ag<sub>2</sub>O composite can be attributed to the narrowed band gap, improved light absorption, and the enhanced separation of photo-generated carriers induced by the integration of Ag<sub>2</sub>O nanoparticles and H-PTO microplates. This work could shed some light upon the facile design and low-cost synthesis of effective perovskite-based Ag<sub>2</sub>O catalysts for wastewater purification.</p>

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Hierarchical Perovskite PbTiO3-Ag2O Microplate Composites for Efficient Photocatalytic Degradation of RhB Under Solar Light Irradiation

  • 期刊论文

  • 发表日期：

    2025年9月15日

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  • Yuanchun Li,
  • Chenshuo Ye,
  • Shun Liu,
  • Yong Fu,
  • Enrong Zhang,
  • Simin Yin

摘要

Hierarchical perovskite PbTiO3-Ag2O (H-PTO-Ag2O) microplate composites were successfully synthesized by decorating Ag2O nanoparticles on the surface of hierarchical PTO microplate (H-PTO) via a facile wet-chemical method. The composite samples were characterized by SEM, XRD, XPS, PL, and UV-Vis techniques. The catalytic activities of the as-prepared H-PTO-Ag2O composites were evaluated. And the H-PTO-Ag2O-55wt% composite displayed the best photocatalytic activity with 99.1% RhB degraded within 25 min under simulated solar light irradiation, exhibiting a kinetic constant of 0.17692 min−1, 5.8 times higher than that of pure H-PTO (0.03046 min−1). The remarkable photocatalytic activity of the H-PTO-Ag2O composite can be attributed to the narrowed band gap, improved light absorption, and the enhanced separation of photo-generated carriers induced by the integration of Ag2O nanoparticles and H-PTO microplates. This work could shed some light upon the facile design and low-cost synthesis of effective perovskite-based Ag2O catalysts for wastewater purification.