The role of the annealing process in different gas environments on the degradation of the methylene blue organic pollutant by brookite-TiO<sub>2</sub> photocatalyst

dc.authoridAtay, Ferhunde/0000-0001-5650-9146
dc.authorscopusid57208592476
dc.authorscopusid6701589723
dc.authorwosidAtay, Ferhunde/AAV-3055-2021
dc.contributor.authorCergel, Muge Soyleyici
dc.contributor.authorAtay, Ferhunde
dc.contributor.otherTıbbi Görüntüleme Teknikleri / Medical Imaging Techniques
dc.date.accessioned2024-05-25T11:41:16Z
dc.date.available2024-05-25T11:41:16Z
dc.date.issued2019
dc.departmentOkan Universityen_US
dc.department-temp[Cergel, Muge Soyleyici] Istanbul Okan Univ, Hlth Serv Vocat High Sch, Program Med Imaging Technol, TR-34959 Istanbul, Turkey; [Atay, Ferhunde] Eskisehir Osmangazi Univ, Art & Sci Fac, Dept Phys, Eskisehir, Turkeyen_US
dc.descriptionAtay, Ferhunde/0000-0001-5650-9146en_US
dc.description.abstractAmong sustainable technologies, TiO2 photocatalysts are promising materials as an alternative to conventional methods that are being used for eliminating problems such as water, air, and environmental pollution originating from industrial waste. In this work, TiO2 film was produced by ultrasonic spray pyrolysis technique and annealed in oxygen, argon, and nitrogen atmospheres. The effect of the annealing process in different environments was determined by investigating their structural, optical, surface, and photocatalytic properties. It was determined from X-ray diffraction patterns that highly (004)-oriented anatase-TiO2 films were successfully obtained with annealing of polycrystalline brookite-TiO2 film. Thickness and refractive index values were determined by spectroscopic ellipsometry. According to absorbance and photoluminescence spectra, indirect optical band gaps were shifted to the visible region, and the oxygen vacancy and Ti3+ cations were formed as surface defects, respectively. Atomic force microscopy and energy-dispersive X-ray spectroscopy were used to determine surface properties and elemental compositions, respectively. Besides, to investigate the use potentials of TiO2 films in photocatalytic applications, photocatalytic tests were made using methylene blue as organic pollutant. Consequently, the structural, optical, and surface properties of the TiO2 films are strongly dependent on the annealing medium, and TiO2 films annealed in oxygen and nitrogen environments with higher photocatalytic activities are promising materials for photocatalytic applications. We also conclude that determination of the physical and photocatalytic properties of brookite-TiO2 film is one of the important outputs due to the difficulties encountered in obtaining of the unstable brookite phase.en_US
dc.identifier.citation5
dc.identifier.doi10.1007/s11581-019-02941-6
dc.identifier.endpage3836en_US
dc.identifier.issn0947-7047
dc.identifier.issn1862-0760
dc.identifier.issue8en_US
dc.identifier.scopus2-s2.0-85065396301
dc.identifier.scopusqualityQ2
dc.identifier.startpage3823en_US
dc.identifier.urihttps://doi.org/10.1007/s11581-019-02941-6
dc.identifier.urihttps://hdl.handle.net/20.500.14517/1505
dc.identifier.volume25en_US
dc.identifier.wosWOS:000476796200030
dc.identifier.wosqualityQ3
dc.institutionauthorSöyleyici Cergel M.
dc.institutionauthorSöyleyici Çergel, Müge
dc.language.isoenen_US
dc.publisherSpringer Heidelbergen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectTiO2 filmsen_US
dc.subjectUltrasonic spray pyrolysisen_US
dc.subjectSpectroscopic ellipsometeren_US
dc.subjectOptical band gapen_US
dc.subjectPhotoluminescenceen_US
dc.subjectAFMen_US
dc.subjectXRDen_US
dc.subjectPhotocatalytic propertiesen_US
dc.titleThe role of the annealing process in different gas environments on the degradation of the methylene blue organic pollutant by brookite-TiO<sub>2</sub> photocatalysten_US
dc.typeArticleen_US
dspace.entity.typePublication
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relation.isOrgUnitOfPublication5416f148-e1e0-4094-9b89-bbe3799b3e44
relation.isOrgUnitOfPublication.latestForDiscovery5416f148-e1e0-4094-9b89-bbe3799b3e44

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