1. Ba2+-doping introduced piezoelectricity and efficient Ultrasound-Triggered bactericidal activity of brookite TiO2 nanorods.
- Author
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Han, Yijun, Zhang, Haoran, Yang, Ruihao, Yu, Xinyue, Marfavi, Zeinab, Lv, Quanjie, Zhang, Gengxin, Sun, Kang, Yuan, Congli, and Tao, Ke
- Subjects
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PIEZOELECTRICITY , *TITANIUM dioxide , *ESCHERICHIA coli , *WATER disinfection , *REACTIVE oxygen species - Abstract
[Display omitted] Exploring highly efficient ultrasound-triggered catalysts is pivotal for various areas. Herein, we presented that Ba2+ doped brookite TiO 2 nanorod (TiO 2 : Ba) with polarization-induced charge separation is a candidate. The replacement of Ba2+ for Ti4+ not only induced significant lattice distortion to induce polarization but also created oxygen vacancy defects for facilitating the charge separation, leading to high-efficiency reactive oxygen species (ROS) evolution in the piezo-catalytic processes. Furthermore, the piezocatalytic ability to degrade dye wastewater demonstrates a rate constant of 0.172 min-1 and achieves a 100 % antibacterial rate at a low dose for eliminating E. coli. This study advances that doping can induce piezoelectricity and reveals that lattice distortion-induced polarization and vacancy defects engineering can improve ROS production, which might impact applications such as water disinfection and sonodynamic therapy. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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