Fabrication of ZIF-8 decorated copper doped TiO2 nanocomposite at low ZIF-8 loading for solar energy applications

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dc.authoridCetin, Ali Emrah/0000-0002-1468-6221
dc.authoridYurtsever, Husnu Arda/0000-0002-1920-8149
dc.contributor.authorYurtsever, Husnu Arda
dc.contributor.authorCetin, Ali Emrah
dc.date.accessioned2025-01-06T17:43:56Z
dc.date.available2025-01-06T17:43:56Z
dc.date.issued2021
dc.description.abstractThe effects of crystallization time and amount of Zeolitic Imidazolate Framework-8 (ZIF-8) on the photocatalytic activity of ZIF-8 decorated copper (Cu) doped titania (TiO2) (ZIF-8/Cu-TiO2) powders were investigated in this study. The formation of nanocomposite structure of ZIF-8 crystals grown over the surface of core Cu-TiO2 particles containing heterojunction sites was observed at low ZIF-8 level. Powders containing ZIF-8 in the 5-46% range (weight basis) were synthesized and their activities in the photocatalytic degradation of an organic dye molecule were evaluated. X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (ATR-FTIR), thermal gravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) and high resolution transmission electron microscopy (HR-TEM) analyses indicated that ZIF-8/Cu-TiO2 nanocomposite can be prepared at low levels of ZIF-8. HR-TEM images of 46% ZIF-8/Cu-TiO2 showed that Cu-TiO2 particles act as a core and ZIF-8 crystals grow over the surface of Cu-TiO2 particles during crystal growth and Cu-TiO2 particles were almost completely covered with ZIF-8 crystals. Photocatalytic activity increased with decreasing ZIF-8 level which was attributed to the formation of heterojunctions due to partial coverage of TiO2 surface. The 1st order reaction rate constant of ZIF-8/Cu-TiO2 nanocomposite containing 5% ZIF-8 was found to be 4 and 1.4 times that of bare ZIF-8 and CuTiO2, respectively. Partial coverage of TiO2 surface with ZIF-8 crystals lead to the formation of light exposed ZIF8/Cu-TiO2 heterojunction sites for the enhanced degradation of the dye molecule. The presence of ZIF-8 in the nanocomposite also increased the adsorption of the organic dye by the interaction with open Zn2+ metal sites of ZIF-8 on the nanocomposite surface. This study revealed that ZIF-8/Cu-TiO2 nanocomposites could be prepared at low ZIF-8 levels and short growth times with higher photocatalytic activities than their constituents and nanocomposites prepared at higher ZIF-8 levels and longer growth times.
dc.description.sponsorshipAdana Alparslan Turkes Science and Technology University Scientific Research Coordination Unit, Turkey [16103013]
dc.description.sponsorshipThis study was supported by Adana Alparslan Turkes comma Science and Technology University Scientific Research Coordination Unit, Turkey. Project Number: 16103013.
dc.identifier.doi10.1016/j.colsurfa.2021.126980
dc.identifier.issn0927-7757
dc.identifier.issn1873-4359
dc.identifier.scopus2-s2.0-85107791117
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.colsurfa.2021.126980
dc.identifier.urihttps://hdl.handle.net/20.500.14669/2864
dc.identifier.volume625
dc.identifier.wosWOS:000672810400001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofColloids and Surfaces A-Physicochemical and Engineering Aspects
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectPhotocatalysis
dc.subjectNanocomposite
dc.subjectZIF-8
dc.subjectTiO2
dc.subjectHeterojunction
dc.titleFabrication of ZIF-8 decorated copper doped TiO2 nanocomposite at low ZIF-8 loading for solar energy applications
dc.typeArticle

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