School of Engineering, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh 175005, India.
ACS Appl Mater Interfaces. 2021 May 19;13(19):22914-22925. doi: 10.1021/acsami.1c01314. Epub 2021 May 6.
A flexible poly(vinylidene difluoride) (PVDF) composite film embedding LiNbO ceramics decorated with silver nanoparticles (Ag NPs) has been synthesized using the solvent casting method. The polar β-phase, Ag NPs, and LiNbO 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 and 96.65% of bacteria within 180 min of sonication. The piezocatalytic performance of the PVDF composite film embedding Ag-loaded LiNbO in all three applications was superior to that obtained in the case of the PVDF film embedding LiNbO and the bare PVDF film. This demonstrates the pronounced effect of Ag NPs in the increase of piezocatalytic activity in the composite film.
采用溶剂浇铸法合成了一种柔性聚偏二氟乙烯（PVDF）复合膜，该复合膜中嵌入了负载银纳米粒子（Ag NPs）的 LiNbO 陶瓷。通过各种表征方法证实了复合膜中的极性β相、Ag NPs 和 LiNbO 相。在超声作用下，复合膜利用压电化学作用对阳离子和阴离子染料表现出良好的降解性能。此外，该复合膜还能有效降解两种模型药物污染物四环素和环丙沙星。除此之外，在超声作用 180 分钟内，该复合膜压电化学作用去除了超过 99.999%的 和 96.65%的 细菌。在所有三种应用中，负载 Ag 的 LiNbO 嵌入 PVDF 复合膜的压电化学性能均优于嵌入 LiNbO 的 PVDF 膜和纯 PVDF 膜。这表明 Ag NPs 对提高复合膜的压电化学活性具有显著作用。
