Piezophotocatalytic Activity of PVDF/Fe3O4 Nanofibers: Effect of Ultrasound Frequency and Light Source on the Decomposition of Methylene Blue

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dc.contributor.authorRabadanova, Alinacs
dc.contributor.authorSelimov, Daudcs
dc.contributor.authorGulakhmedov, Rashidcs
dc.contributor.authorMagomedova, Asiyatcs
dc.contributor.authorRonoh, Kipkuruics
dc.contributor.authorČástková, Kláracs
dc.contributor.authorSobola, Dinaracs
dc.contributor.authorKaspar, Pavelcs
dc.contributor.authorShuaibov, Abdulatipcs
dc.contributor.authorAbdurakhmanov, Magomedcs
dc.contributor.authorKh. Rabadanov, Murtazalics
dc.contributor.authorRamazanov, Shikhgasancs
dc.contributor.authorOrudzhev, Faridcs
dc.coverage.issue22cs
dc.coverage.volume10cs
dc.date.accessioned2025-07-17T08:59:23Z
dc.date.available2025-07-17T08:59:23Z
dc.date.issued2025-05-29cs
dc.description.abstractThis study investigates the piezophotocatalytic (PPhC) performance of electrospun nanofibrous membranes composed of polyvinylidene fluoride (PVDF) and magnetite (Fe3O4) nanoparticles. The composite membranes were synthesized via electrospinning, with optimized parameters to promote -phase crystallinity and uniform fiber morphology. Structural and phase analyses by SEM, FTIR, Raman, and XPS confirmed the predominance of the electroactive -phase (99.8%) in the composite, as well as strong interfacial interaction between Fe3O4 and the PVDF matrix. The composites exhibited significantly enhanced surface hydrophilicity and piezoelectric response compared to pristine PVDF. The piezoelectric potential generation was confirmed using a flexible piezoelectric nanogenerator (PENG), where a 3 × 1 cm membrane generated output voltages up to 2 V under periodic mechanical deformation at 4 Hz. Photocatalytic and piezophotocatalytic degradation of methylene blue (MB) was carried out under UV and visible light at varying ultrasonic frequencies. Maximum PPhC efficiency was achieved at 40 kHz, with 93% dye degradation in 60 min and a reaction rate constant exceeding the sum of photocatalysis and piezocatalysis by 13%, indicating a pronounced synergistic effect. Reactive oxygen species trapping and fluorescence spectroscopy confirmed •OH as the dominant oxidant. H2O2 productivity under PPhC reached 1700 mol·g–1·h–1 in pure water, with a light-to-chemical energy conversion efficiency of 0.26%. Additionally, experiments conducted under an alternating magnetic field (0.3 T, 1.3 Hz) demonstrated 50% MB degradation within 240 min, revealing the contribution of magnetoelectric coupling as an alternative catalytic activation mechanism. The results suggest that PVDF/Fe3O4 nanocomposites are highly promising for multifunctional catalytic applications, combining piezoelectric, photo-, and magnetoelectric activation for efficient water purification and green oxidant production.en
dc.formattextcs
dc.format.extent23035-23048cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationACS OMEGA. 2025, vol. 10, issue 22, p. 23035-23048.en
dc.identifier.doi10.1021/acsomega.5c01092cs
dc.identifier.issn2470-1343cs
dc.identifier.orcid0000-0002-6867-1201cs
dc.identifier.orcid0000-0002-6343-6659cs
dc.identifier.orcid0000-0002-0008-5265cs
dc.identifier.orcid0000-0003-1757-2382cs
dc.identifier.other198034cs
dc.identifier.researcheridGOH-0597-2022cs
dc.identifier.researcheridG-1175-2019cs
dc.identifier.researcheridH-1293-2014cs
dc.identifier.scopus57210472338cs
dc.identifier.scopus57189064262cs
dc.identifier.scopus56516508200cs
dc.identifier.urihttps://hdl.handle.net/11012/255183
dc.language.isoencs
dc.publisherACS Publicationscs
dc.relation.ispartofACS OMEGAcs
dc.relation.urihttps://pubs.acs.org/doi/10.1021/acsomega.5c01092cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2470-1343/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectPVDFen
dc.subjectFe3O4en
dc.subjectpiezo-photocatalysisen
dc.subjectmethylene blueen
dc.subjectultrasounden
dc.subjectmagnetic fielden
dc.subjectPENGen
dc.subjectH2O2en
dc.subjectvisible lighten
dc.titlePiezophotocatalytic Activity of PVDF/Fe3O4 Nanofibers: Effect of Ultrasound Frequency and Light Source on the Decomposition of Methylene Blueen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-198034en
sync.item.dbtypeVAVen
sync.item.insts2025.07.17 10:59:23en
sync.item.modts2025.07.17 10:34:05en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. ÚMVI-odbor keramiky a polymerůcs
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav fyzikycs
thesis.grantorVysoké učení technické v Brně. . Ústav přístrojové techniky AV ČRcs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé keramické materiálycs
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