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dc.contributor.authorMichalow, Katarzyna A.-
dc.contributor.authorFlak, Dorota-
dc.contributor.authorHeel, Andre-
dc.contributor.authorParlinska-Wojtan, Magdalena-
dc.contributor.authorRekas, Mieczyslaw-
dc.contributor.authorGraule, Thomas-
dc.date.accessioned2018-08-17T07:54:20Z-
dc.date.available2018-08-17T07:54:20Z-
dc.date.issued2012-
dc.identifier.issn0944-1344de_CH
dc.identifier.issn1614-7499de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/9075-
dc.description.abstractTiO2:Nb nanopowders within a dopant concentration in the range of 0.1-15 at.% were prepared by one-step flame spray synthesis. Effect of niobium doping on structural, optical and photocatalytic properties of titanium dioxide nanopowders was studied. Morphology and structure were investigated by means of Brunauer–Emmett–Teller isotherm, X-ray diffraction and transmission electron microscopy. Diffuse reflectance and the resulting band gap energy were determined by diffuse reflectance spectroscopy. Photocatalytic activity of the investigated nanopowders was revised for the photodecomposition of methylene blue (MB), methyl orange (MO) and 4-chlorophenol under UVA and VIS light irradiation. Commercial TiO2-P25 nanopowder was used as a reference. The specific surface area of the powders was ranging from 42.9 m2/g for TiO2:0.1 at.% Nb to 90.0 m2/g for TiO2:15 at.% Nb. TiO2:Nb particles were nanosized, spherically shaped and polycrystalline. Anatase was the predominant phase in all samples. The anatase-related transition was at 3.31 eV and rutile-related one at 3.14 eV. TiO2:Nb nanopowders exhibited additional absorption in the visible range. In comparison to TiO2-P25, improved photocatalytic activity of TiO2:Nb was observed for the degradation of MB and MO under both UVA and VIS irradiation, where low doping level (Nb < 1 at.%) was the most effective. Niobium doping affected structural, optical and photocatalytic properties of TiO2. Low dopant level enhanced photocatalytic performance under UVA and VIS irradiation. Therefore, TiO2:Nb (Nb < 1 at.%) can be proposed as an efficient selective solar light photocatalyst.de_CH
dc.language.isoende_CH
dc.publisherSpringerde_CH
dc.relation.ispartofEnvironmental Science and Pollution Researchde_CH
dc.rightsLicence according to publishing contractde_CH
dc.subjectAzo Compoundsde_CH
dc.subjectLightde_CH
dc.subjectMethylene Bluede_CH
dc.subjectMolecular Structurede_CH
dc.subjectNanostructuresde_CH
dc.subjectNiobiumde_CH
dc.subjectPhotochemical Processesde_CH
dc.subjectPhotolysisde_CH
dc.subjectTitaniumde_CH
dc.subjectUltraviolet Raysde_CH
dc.subject.ddc540: Chemiede_CH
dc.titleEffect of Nb doping on structural, optical and photocatalytic properties of flame-made TiO2 nanopowderde_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
dcterms.typeTextde_CH
zhaw.departementSchool of Engineeringde_CH
zhaw.organisationalunitInstitute of Materials and Process Engineering (IMPE)de_CH
dc.identifier.doi10.1007/s11356-012-0953-6de_CH
zhaw.funding.euNode_CH
zhaw.issue9de_CH
zhaw.originated.zhawNode_CH
zhaw.pages.end3708de_CH
zhaw.pages.start3696de_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume19de_CH
zhaw.publication.reviewPeer review (Publikation)de_CH
zhaw.webfeedProzesstechnikde_CH
Appears in Collections:Publikationen School of Engineering

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