BiOBr@PZT Nanocomposite Membranes via Electrospinning-SILAR Technology: A Sustainable Green Material for Photocatalytic Degradation in Coloration-Related Wastewater Remediation

Zhengyu Ding, Jun Zhang, Zheyao Xia, Binjie Xin (), Jiali Yu () and Xiaoyuan Lei
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Zhengyu Ding: School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China
Jun Zhang: School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China
Zheyao Xia: School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China
Binjie Xin: School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China
Jiali Yu: School of Fashion and Textiles, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong
Xiaoyuan Lei: School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China

Sustainability, 2025, vol. 17, issue 11, 1-23

Abstract: The textile industry encounters serious environmental challenges from wastewater with persistent organic pollutants, demanding sustainable solutions for remediation. Herein, we report a novel green synthesis of flexible BiOBr@PZT nanocomposite membranes via electrospinning and successive ionic layer adsorption and reaction (SILAR) for visible-light-driven photocatalytic degradation. The hierarchical structure integrates leaf-like BiOBr nanosheets with PAN/ZnO/TiO 2 (PZT) nanofibers, forming a Z-scheme heterojunction. This enhances the separation of photogenerated carriers while preserving mechanical integrity. SILAR-enabled low temperature deposition ensures eco-friendly fabrication by avoiding toxic precursors and cutting energy use. Optimized BiOBr@PZT-5 shows exceptional photocatalytic performance, achieving 97.6% tetracycline hydrochloride (TCH) degradation under visible light in 120 min. It also has strong tensile strength (4.29 MPa) and cycling stability. Mechanistic studies show efficient generation of O 2 − and OH radicals through synergistic light absorption, charge transfer, and turbulence-enhanced mass diffusion. The material’s flexibility allows reusable turbulent flow applications, overcoming rigid catalyst limitations. Aligning with green chemistry and UN SDGs, this work advances multifunctional photocatalytic systems for scalable, energy-efficient wastewater treatment, offering a paradigm that integrates environmental remediation with industrial adaptability.

Keywords: BiOBr heterojunction; electrospinning; flexible photocatalysis; green synthesis; sustainable water treatment (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2025
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