Piezoelectric-Fenton degradation and mechanism study of Fe2O3/PVDF-HFP porous film drove by flowing water

Mengnan Chai; Wangshu Tong; Zhihao Wang; Zhensheng Chen; Yuancheng An; Yihe Zhang

doi:10.1016/j.jhazmat.2022.128446

Piezoelectric-Fenton degradation and mechanism study of Fe₂O₃/PVDF-HFP porous film drove by flowing water

J Hazard Mater. 2022 May 15:430:128446. doi: 10.1016/j.jhazmat.2022.128446. Epub 2022 Feb 8.

Authors

Mengnan Chai¹, Wangshu Tong², Zhihao Wang¹, Zhensheng Chen¹, Yuancheng An¹, Yihe Zhang³

Affiliations

¹ 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.
² 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. Electronic address: tong@cugb.edu.cn.
³ 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. Electronic address: zyh@cugb.edu.cn.

PMID: 35152105
DOI: 10.1016/j.jhazmat.2022.128446

Abstract

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-Fe₂O₃ nanoparticles). α-Fe₂O₃ nanoparticles improve the piezoelectric catalysis performance of PVDF-HFP by the β-phase enhancement and provide Fe³⁺ to react with H₂O₂ generated by the piezoelectric film itself, leading to an additional Fenton reaction. Meanwhile, the Fe³⁺/Fe²⁺ cycle in the Fenton process accelerates under the piezoelectric field, promoting the Fenton reaction for 6.9% degradation improvement. The study on Fe₂O₃/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.

Keywords: Gentle force; Piezocatalysis; Piezo–Fenton catalysis; Reaction mechanism; Self–powered.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Fluorocarbon Polymers
Hydrogen Peroxide*
Polyvinyls*
Porosity
Water

Substances

Fluorocarbon Polymers
Polyvinyls
Water
polyvinylidene fluoride
Hydrogen Peroxide