Effects of Fluorination and Thermal Shock on the Photocatalytic Activity of Bi<sub>2</Sub>o<sub>3< Nanopowders

dc.authorid Bouziani, asmae/0000-0001-6045-3608
dc.authorid Park, Jongee/0000-0003-1415-6906
dc.authorid Ozturk, Abdullah/0000-0002-1525-1561
dc.authorscopusid 57117598800
dc.authorscopusid 58155971100
dc.authorscopusid 7103003538
dc.authorwosid Bouziani, asmae/ABC-3692-2020
dc.authorwosid Park, Jongee/N-9579-2015
dc.contributor.author Bouziani, Asmae
dc.contributor.author Park, Jongee
dc.contributor.author Ozturk, Abdullah
dc.contributor.other Metallurgical and Materials Engineering
dc.date.accessioned 2024-07-05T15:19:41Z
dc.date.available 2024-07-05T15:19:41Z
dc.date.issued 2021
dc.department Atılım University en_US
dc.department-temp [Bouziani, Asmae] Middle East Tech Univ, Chem Engn Dept, Ankara, Turkey; [Park, Jongee] Atilim Univ, Met & Mat Engn Dept, Ankara, Turkey; [Ozturk, Abdullah] Middle East Tech Univ, Met & Mat Engn Dept, Ankara, Turkey en_US
dc.description Bouziani, asmae/0000-0001-6045-3608; Park, Jongee/0000-0003-1415-6906; Ozturk, Abdullah/0000-0002-1525-1561 en_US
dc.description.abstract Fluorinated Bi2O3 (F-Bi2O3) nanopowder was prepared via fluorination followed by thermal shock of alpha-Bi2O3 nanopowder. The XRD, FTIR, SEM, and DRS characterization techniques were employed to investigate the effects of fluorine (F) insertion into the alpha-Bi2O3 host and the thermal shock from different temperatures. The crystal structure, optical and photocatalytic properties of the F-Bi2O3 nanopowders prepared were researched. The XRD results confirmed the substitution of O2- with F-. The FTIR results revealed that the coordination of Bi atoms changed upon F- substitution. The incorporation of F into the alpha-Bi2O3 host and thermal shock did not influence the morphology but modified the band structure of alpha-Bi2O3, leading to a red-shift in the optical absorption edge. Also, the bandgap narrowed from 2.8 eV to 2.6 eV. The density functional theory calculation proved that the F 2p orbitals were positioned in the valence band (VB), resulting in broader and more spread bands for F-Bi2O3. The results suggested that the photoexcited charge carrier mobility in the valence band (VB) and conduction band (CB) are enhanced upon F insertion into alpha-Bi2O3. The photocatalytic efficiency of the synthesized nanopowders was assessed by the degradation of Bromocresol Green (BG) under visible light illumination. Photocatalytic activity improved upon fluorination. The F-Bi2O3 nanopowders thermally shocked from higher temperatures showed negligible photocatalytic performance. The best photocatalytic performance of 70% BG degradation was realized after 180 min visible irradiation for the F-Bi2O3 nanopowder thermal shocked from 500 degrees C. en_US
dc.description.sponsorship Atilim University [ADP-1920-002] en_US
dc.description.sponsorship The authors thank Atilim University for the partial financial support through project number ADP-1920-002. en_US
dc.identifier.citationcount 11
dc.identifier.doi 10.1016/j.colsurfa.2021.127049
dc.identifier.issn 0927-7757
dc.identifier.issn 1873-4359
dc.identifier.scopus 2-s2.0-85108664403
dc.identifier.uri https://doi.org/10.1016/j.colsurfa.2021.127049
dc.identifier.uri https://hdl.handle.net/20.500.14411/2005
dc.identifier.volume 626 en_US
dc.identifier.wos WOS:000685970400003
dc.identifier.wosquality Q2
dc.institutionauthor Park, Jongee
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.publicationcategory Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı en_US
dc.rights info:eu-repo/semantics/closedAccess en_US
dc.scopus.citedbyCount 14
dc.subject Bi2O3 en_US
dc.subject Fluorination en_US
dc.subject Thermal shock en_US
dc.subject Photocatalysis en_US
dc.subject Nanopowder en_US
dc.title Effects of Fluorination and Thermal Shock on the Photocatalytic Activity of Bi<sub>2</Sub>o<sub>3< Nanopowders en_US
dc.type Article en_US
dc.wos.citedbyCount 14
dspace.entity.type Publication
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relation.isOrgUnitOfPublication.latestForDiscovery 7cf7435b-3e8e-404e-adee-0f6f7dc8e070

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