Hydrogen Bond-Induced Activation of Photocatalytic and Piezophotocatalytic Properties in Calcium Nitrate Doped Electrospun PVDF Fibers

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dc.contributor.authorOrudzhev, Faridcs
dc.contributor.authorSobola, Dinaracs
dc.contributor.authorRamazanov, Shikhgasancs
dc.contributor.authorČástková, Kláracs
dc.contributor.authorSelimov, Daudcs
dc.contributor.authorRabadanova, Alinacs
dc.contributor.authorShuaibov, Abdulatipcs
dc.contributor.authorGulakhmedov, Rashidcs
dc.contributor.authorAbdurakhmanov, Magomedcs
dc.contributor.authorGiraev, Kamal M.cs
dc.coverage.issue15cs
dc.coverage.volume15cs
dc.date.issued2023-07-30cs
dc.description.abstractIn this study, polyvinylidene fluoride (PVDF) fibers doped with hydrated calcium nitrate were prepared using electrospinning. The samples were analyzed using scanning electron microscopy (SEM), X-ray diffraction (XRD), optical spectroscopy, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR), Raman, and photoluminescence (PL) spectroscopy. The results are complementary and confirm the presence of chemical hydrogen bonding between the polymer and the dopant. Additionally, there was a significant increase in the proportion of the electroactive polar beta phase from 72 to 86%. It was shown that hydrogen bonds acted as a transport pathway for electron capture by the conjugated salt, leading to more than a three-fold quenching of photoluminescence. Furthermore, the optical bandgap of the composite material narrowed to the range of visible light energies. For the first time, it the addition of the salt reduced the energy of the PVDF exciton by a factor of 17.3, initiating photocatalytic activity. The calcium nitrate-doped PVDF exhibited high photocatalytic activity in the degradation of methylene blue (MB) under both UV and visible light (89 and 44%, respectively). The reaction rate increased by a factor of 2.4 under UV and 3.3 under visible light during piezophotocatalysis. The catalysis experiments proved the efficiency of the membrane design and mechanisms of catalysis are suggested. This study offers insight into the nature of chemical bonds in piezopolymer composites and potential opportunities for their use.en
dc.formattextcs
dc.format.extent1-16cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationPolymers. 2023, vol. 15, issue 15, p. 1-16.en
dc.identifier.doi10.3390/polym15153252cs
dc.identifier.issn2073-4360cs
dc.identifier.orcid0000-0002-0008-5265cs
dc.identifier.orcid0000-0002-6343-6659cs
dc.identifier.other184423cs
dc.identifier.researcheridG-1175-2019cs
dc.identifier.scopus57189064262cs
dc.identifier.urihttp://hdl.handle.net/11012/245012
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofPolymerscs
dc.relation.urihttps://www.mdpi.com/2073-4360/15/15/3252cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2073-4360/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectPVDFen
dc.subjectsalten
dc.subjecthydrogen bonden
dc.subjectexcitonen
dc.subjectphotocatalysisen
dc.subjectpiezophocatalysisen
dc.subjectvisible lighten
dc.titleHydrogen Bond-Induced Activation of Photocatalytic and Piezophotocatalytic Properties in Calcium Nitrate Doped Electrospun PVDF Fibersen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-184423en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:40:33en
sync.item.modts2025.01.17 15:18:06en
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav fyzikycs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé keramické materiálycs
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