Effect of synthesis temperature on the structural properties and photocatalytic activity of TiO2/SiO2 composites synthesized using rice husk ash as a SiO2 source

Basit Öğe Kaydı
dc.contributor.authorYener, H. Banu
dc.contributor.authorHelvaci, Serife S.
dc.date.accessioned2019-10-27T22:28:31Z
dc.date.available2019-10-27T22:28:31Z
dc.date.issued2015
dc.departmentEge Üniversitesien_US
dc.description.abstractTiO2/SiO2 composites were synthesized using titanium tetrachloride as a TiO2 precursor and rice husk ash (RHA) as the SiO2 source at low temperatures. Their photocatalytic performances were investigated in the liquid phase degradation of terephthalic acid (TPA) under UV-C illumination. The effect of synthesis temperature on the properties and photocatalytic activities of the composites were examined by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission gun scanning electron microscope (SEM), thermo gravimetric analysis (TGA), N-2 adsorption desorption analysis, and UV-visible diffuse reflectance spectroscopy (UV-DRS). The XRD patterns indicated the synthesis of rutile TiO2 particles due to the acidic nature of the reactant solution at low temperature without the need of calcination. The SEM images showed that the spherical and flower like agglomerates, consisting of nano fibers, are formed depending on the synthesis temperature. The TGA analysis showed no structural change or deformation in the catalysts due to heating. The N-2 adsorption desorption analysis revealed a change in the pore structure of the TiO2 particles from micro-to mixed micro-and meso-porous in the TiO2/SiO2 composites with an increase in their surface areas. The differences in the structural properties of the composites varied their photocatalytic activities in the degradation reactions. The presence of SiO2 in the composites enhanced the photocatalytic activity of the TiO2 particles and simplified the recovery of the catalysts from the treated solution by increasing their rate of precipitation. The TiO2/SiO2 composites synthesized at 95 degrees C exhibited the best photocatalytic activity confirmed by both kinetic constant and turnover frequency. All the particles and composites synthesized indicated better photocatalytic performance than that of the P25 TiO2. (C) 2014 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [04M255, 110M451]; Science, Technology Application, and Research Center of Ege University (EBILTEM)Ege University [2012/BIL/027]; Scientific Research Council of Ege UniversityEge University [11MUH034, 12MUH042]en_US
dc.description.sponsorshipThis project was supported by The Scientific and Technological Research Council of Turkey (TUBITAK) through Projects 104M255 and 110M451, The Science, Technology Application, and Research Center of Ege University (EBILTEM) through Project 2012/BIL/027, and The Scientific Research Council of Ege University through Projects 11MUH034 and 12MUH042. The authors also thank Prof. Dr. F.S.C. Ozkan and specialist Nesrin Tatlidil (Department of Chemical Engineering, Izmir Institute of Technology) for surface area measurements, PETKIM Petrokimya Holding A.S. for the TPA and Erdoganlar Food Industry and Business Company for the RHA.en_US
dc.identifier.doi10.1016/j.seppur.2014.11.013
dc.identifier.endpage93en_US
dc.identifier.issn1383-5866
dc.identifier.issn1873-3794
dc.identifier.issn1383-5866en_US
dc.identifier.issn1873-3794en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage84en_US
dc.identifier.urihttps://doi.org/10.1016/j.seppur.2014.11.013
dc.identifier.urihttps://hdl.handle.net/11454/50928
dc.identifier.volume140en_US
dc.identifier.wosWOS:000348685900011en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofSeparation and Purification Technologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectTiO2/SiO2en_US
dc.subjectRice husk ashen_US
dc.subjectTerephthalic aciden_US
dc.subjectPhotocatalysten_US
dc.subjectTitanium tetrachlorideen_US
dc.subjectTurnover frequencyen_US
dc.titleEffect of synthesis temperature on the structural properties and photocatalytic activity of TiO2/SiO2 composites synthesized using rice husk ash as a SiO2 sourceen_US
dc.typeArticleen_US

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu