Flexible Ag@LiNbO₃/PVDF Composite Film for Piezocatalytic Dye/Pharmaceutical Degradation and Bacterial Disinfection

Abstract

A flexible poly(vinylidene difluoride) (PVDF) composite film embedding LiNbO 3 ceramics decorated with silver nanoparticles (Ag NPs) has been synthesized using the solvent casting method. The polar β-phase, Ag NPs, and LiNbO 3 phases were confirmed in the composite film using various characterization methods. The composite film showed promising degradation of cationic and anionic dyes using piezocatalysis under ultrasonication. Moreover, this composite film also effectively degraded two model pharmaceutical pollutants named tetracycline and ciprofloxacin using piezocatalysis under ultrasonication. In addition to this, this composite film piezocatalytically removed more than 99.999% of Escherichia coli and 96.65% of Staphylococcus aureus bacteria within 180 min of sonication. The piezocatalytic performance of the PVDF composite film embedding Ag-loaded LiNbO 3 in all three applications was superior to that obtained in the case of the PVDF film embedding LiNbO 3 and the bare PVDF film. This demonstrates the pronounced effect of Ag NPs in the increase of piezocatalytic activity in the composite film.

Reusable piezocatalytic water disinfection activity of CVD-grown few-layer WS2 on sapphire substrate

“…The generalized process of the generation of ROS followed by the degradation process is described below: 7,39…”

Photodeposition of CoOx nanoparticles on BiFeO3 nanodisk for efficiently piezocatalytic degradation of rhodamine B by utilizing ultrasonic vibration energy

“…The optimization of reaction conditions can further improve the piezocatalytic performance of the CoO x /BiFeO 3 . In order to reasonably evaluate the piezocatalytic activity of the CoO x /BiFeO 3 catalyst, a comparison of the dye degradation performance between the prepared sample and some reported piezocatalysts is implemented [18] , [19] , [22] , [53] , [54] , [55] , [56] , [57] , [58] , [59] , [60] . As shown in Table 1 , the CoO x /BiFeO 3 works better than many piezoelectric catalysts in terms of degradation efficiency and degradation rate, indicating that it has a great potential in purifying water through piezocatalysis.…”

Piezoelectric built-in electric field advancing TiO2 for highly efficient photocatalytic air purification

“…25.2° is the diffraction peak of TiO 2 (P25), and the diffraction peak of TiO 2 becomes weaker after hot-stretching. The diffraction peaks at approximately 18.2° and 39.0° can be indexed to (020) and (002) of α-phase PVDF, 22 -respectively. The diffraction peaks at approximately 20.7° and 35.0° can be indexed to (200) and (001) of β-phase PVDF.…”