Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China.
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China.
J Hazard Mater. 2022 May 15;430:128446. doi: 10.1016/j.jhazmat.2022.128446. Epub 2022 Feb 8.
Piezocatalysis driven by a gentle force possesses broad application prospects for degrading organic pollutants, sterilisation, wound healing and tissue recovery. The flexible and industrially scalable poly(vinylidene fluoride) (PVDF) film is commonly used in piezocatalysis. However, under gentle force action, PVDF composite-based piezocatalysis is poor. Herein, a flexible porous film based on poly(vinylidene fluoride)-hexafluoro propylene (PVDF-HFP) is enhanced with Fenton fillers (α-FeO nanoparticles). α-FeO nanoparticles improve the piezoelectric catalysis performance of PVDF-HFP by the β-phase enhancement and provide Fe to react with HO generated by the piezoelectric film itself, leading to an additional Fenton reaction. Meanwhile, the Fe/Fe cycle in the Fenton process accelerates under the piezoelectric field, promoting the Fenton reaction for 6.9% degradation improvement. The study on FeO/PVDF-HFP porous film with the piezo-Fenton reaction under flowing water may help promote new piezocatalysis designs with high efficiency for self-powered environmental purification.
压电力驱动的柔和力在降解有机污染物、杀菌、伤口愈合和组织恢复等方面具有广阔的应用前景。柔性且可工业规模化的聚偏二氟乙烯（PVDF）薄膜常用于压电力催化。然而，在柔和力作用下，基于 PVDF 复合材料的压电力催化效果不佳。在此，通过添加 Fenton 填料（α-FeO 纳米颗粒）增强了基于聚偏二氟乙烯-六氟丙烯（PVDF-HFP）的柔性多孔薄膜。α-FeO 纳米颗粒通过增强β 相提高了 PVDF-HFP 的压电催化性能，并提供 Fe 与压电薄膜自身产生的 HO 反应，导致额外的 Fenton 反应。同时，在压电场下，Fenton 过程中的 Fe/Fe 循环加速，促进了 Fenton 反应，使降解率提高了 6.9%。对具有压电-Fenton 反应的 FeO/PVDF-HFP 多孔薄膜在流动水中的研究可能有助于推动高效自供电环境净化的新型压电力催化设计。
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