A new piezophotocatalytically active membrane based on polyvinylidene fluoride (PVDF) nanofibers with α-Fe₂O₃ nanoparticles incorporated into them has been synthesized by electrospinning. The composition, morphology and structure of α-Fe₂O₃ containing PVDF nanofibers mats were investigated by SEM, XRD, Raman, FTIR, XPS and DSC. Studies have shown that the inclusion of α-Fe₂O₃ nanoparticles promotes additional crystallization and self-polarization of PVDF into an electroactive β-phase. With the help of XPS, the mechanism of interfacial ion-dipole electrostatic interaction, leading to self-polishing and crystallization of the structure, is shown. Using measurements of VB XPS, UPS and the frequency dependence of the dielectric constant, the role of polarization effects on the formation of long-lived metastable energy states in the electronic structure of PVDF near the Fermi level is shown. Piezocatalytic and piezophotocatalytic activity was assessed by the decomposition of Methylene Blue (MB) under the influence of ultrasound and UV-Vis radiation. The efficiency of piezocatalysis and piezophotocatalysis was 60.4% and 99.5%, respectively. With the help of experiments on the capture of active redox forms, it was found that ∙OH radicals are the main component of the MB degradation. Two different mechanisms of generating ∙OH radicals for piezocatalysis and piezophotocatalysis have been reasonably proposed. The stability of the catalyst was shown after five successive cycles of piezophotocatalysis.

通过静电纺丝合成了一种基于聚偏二氟乙烯 (PVDF) 纳米纤维的新型压电光催化活性膜，其中掺入了 α-Fe ₂ O ₃纳米颗粒。通过SEM、XRD、Raman、FTIR、XPS和DSC研究了含α-Fe ₂ O ₃的PVDF纳米纤维毡的组成、形貌和结构。研究表明，夹杂α-Fe ₂ O ₃纳米粒子促进 PVDF 额外结晶和自极化进入电活性 β 相。在 XPS 的帮助下，显示了界面离子 - 偶极子静电相互作用的机制，导致结构的自抛光和结晶。使用对 VB XPS、UPS 和介电常数的频率依赖性的测量，显示了极化效应对费米能级附近 PVDF 电子结构中长寿命亚稳态能态形成的作用。压电催化和压电光催化活性通过亚甲蓝 (MB) 在超声波和紫外-可见辐射的影响下的分解来评估。压电催化和压电光催化的效率分别为 60.4% 和 99.5%。在捕获活性氧化还原形式的实验的帮助下，发现∙OH自由基是MB降解的主要成分。已经合理地提出了两种不同的产生用于压电催化和压电光催化的 ∙OH 自由基的机制。在连续五次压电光催化循环后显示出催化剂的稳定性。