Mgzno- Pvdf Composite Membranes by Interfacial Film-Forming Method for Adsorption and Piezoelectric Degradation of Tetracycline in Water

Abstract

Water pollution is a critical global environmental challenge, necessitating efficient and innovative remediation strategies. This work outlines the successful synthesis of polyvinylidene fluoride (PVDF) composite membranes infused with varying proportions of magnesium-doped zinc oxide (MgZnO) using an economical and simplified interfacial film-forming method. The MgZnO0.1PVDF1-1 composite membrane demonstrates exceptional and stable purification performance, significantly reducing antibiotics in water through a combination of static adsorption and ultrasound-guided piezoelectric degradation. SEM/FTIR/XPS analyses suggest thatthe underlying adsorption mechanisms include surface complexation, ion-dipole interaction, and cation exchange, coupled with piezoelectric catalysis via the dipole moment effect.. The catalytic process leverages a unique converse and positive piezoelectric effect. This induces surface mechanical deformation and internal free radical polarization, leading to outstanding tetracycline (TC) degradation. Comprehensive experiments considering variables like pH, concentration, and reaction time further substantiate the superior performance of MgZnO0.1PVDF1-1, achieving an impressive maximum TC removal ratio of 86%. The high TC removal efficiency, enduring recycling performance and the economical method highlight the significant potential of MgZnO0.1PVDF1-1 in mitigating antibiotic water pollution.

Keywords: Interfacial film-forming method, Adsorption, Piezodegradation, Tetracycline, Mechanism