Application of BiFeO3 and Au/BiFeO3 decorated kaolinite nanocomposites as efficient photocatalyst for degradation of dye and electrocatalyst for oxygen reduction reaction

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dc.authoridOzdemir, Agah Oktay/0000-0003-4488-746X
dc.contributor.authorCaglar, Bulent
dc.contributor.authorGuner, Eda Keles
dc.contributor.authorOzdokur, Kemal Volkan
dc.contributor.authorOzdemir, Agah Oktay
dc.contributor.authorIcer, Fatih
dc.contributor.authorCaglar, Sema
dc.contributor.authorDogan, Bilge
dc.date.accessioned2025-03-23T19:40:58Z
dc.date.available2025-03-23T19:40:58Z
dc.date.issued2021
dc.departmentSinop Üniversitesi
dc.description.abstractTo improve the photocatalytic performance and solve the aggregation problem of BiFeO3 nanoparticles, kaolinite-BiFeO3 photocatalyst was successfully prepared for the first time by decoration of ferromagnetic BiFeO3 nanoparticles onto kaolinite surface. Comparative characteristics of kaolinite, bare BiFeO3 and kaolinite-BiFeO3 photocatalyst were investigated in detail by XRD, TEM, SEM-EDX, XPS, FTIR, VSM, UV-DRS, PL, zeta potential and BET techniques. The photocatalytic activities of the samples were also evaluated by photodegradation of rhodamine B as a model reaction under different irradiations like UVA, visible and sunlight. The kaolinite-BiFeO3 exhibited more superior photocatalytic activity as compared with other samples, which is best fitted to pseudofirst-order kinetic. The reactive species trapping experiments indicated that photogenerated-holes play major roles in the degradation process whereas superoxide radicals possess a secondary effect. Enhanced photocatalytic activity of kaolinite-BiFeO3 is attributed to its kaolinite platform that reduces the recombination opportunities of the photogenerated holes and electrons as well as increases the surface area, decreases the particle size and aggregation of nanoparticles. In addition, we also designed a novel electrocatalytic platform based on gold nanoparticles loaded on kaolinite-BiFeO3 modified carbon paste electrode surface for the examination of electrocatalytic activity for oxygen reduction reaction in alkaline medium. Electrochemical characterizations of the Au/BiFeO3/kaolinite modified carbon paste electrode and other bare surfaces were comparatively carried out with the aid of cyclic voltammetry, electrochemical impedance spectroscopy and chronoamperometry. Au/ BiFeO3/kaolinite modified carbon paste electrode exhibited 15-fold current enhancement together with 100 mV anodic potential shift compared with bare carbon paste electrode.
dc.identifier.doi10.1016/j.jphotochem.2021.113400
dc.identifier.issn1010-6030
dc.identifier.issn1873-2666
dc.identifier.scopus2-s2.0-85110409238
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.jphotochem.2021.113400
dc.identifier.urihttps://hdl.handle.net/11486/6478
dc.identifier.volume418
dc.identifier.wosWOS:000681111800005
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Science Sa
dc.relation.ispartofJournal of Photochemistry and Photobiology A-Chemistry
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250323
dc.subjectKaolinite
dc.subjectPhotodegradation
dc.subjectOxygen reduction
dc.subjectAu nanoparticles
dc.subjectBiFeO3
dc.titleApplication of BiFeO3 and Au/BiFeO3 decorated kaolinite nanocomposites as efficient photocatalyst for degradation of dye and electrocatalyst for oxygen reduction reaction
dc.typeArticle

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