Brookite versus anatase TiO2 photocatalysts: Phase transformations and photocatalytic activities

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dc.identifier.uri Kandiel, Tarek A. Robben, Lars Alkaim, Ayad Bahnemann, Detlef W. 2017-10-30T13:12:54Z 2017-10-30T13:12:54Z 2013
dc.identifier.citation Kandiel, T.A.; Robben, L.; Alkaim, A.; Bahnemann, D.: Brookite versus anatase TiO2 photocatalysts: Phase transformations and photocatalytic activities. In: Photochemical and Photobiological Sciences 12 (2013), Nr. 4, S. 602-609. DOI:
dc.description.abstract Titanium dioxide nanoparticles consisting of pure anatase, anatase-rich, brookite-rich, and pure brookite modifications were synthesized and characterized by X-ray diffraction, field emission-scanning electron microscopy and nitrogen adsorption. The phase transformations among the three modifications of TiO2 (anatase, brookite, and rutile) and the photocatalytic activities of these nanoparticles were investigated by heat treatment over the temperature range from 400 to 800 °C and by the photooxidation of methanol, respectively. Direct transformation of anatase and brookite to rutile was observed, while in the case of the anatase–brookite mixture, anatase transforms firstly to brookite and then to rutile. The photocatalytic activity measurements indicate that brookite nanoparticles exhibit higher photocatalytic activities than anatase, and a comparable activity to that of the anatase-rich nanoparticles. The phase transformations and photocatalytic results are discussed regarding their dependence on crystallite size, surface area, and phase composition. eng
dc.language.iso eng
dc.publisher Cambridge : Royal Society of Chemistry
dc.relation.ispartofseries Photochemical and Photobiological Sciences 12 (2013), Nr. 4
dc.rights Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
dc.subject Titanium dioxide eng
dc.subject nanoparticles eng
dc.subject X-ray eng
dc.subject TiO2 eng
dc.subject anatase, brookite, and rutile eng
dc.subject photocatalytic activity measurement eng
dc.subject.ddc 540 | Chemie ger
dc.title Brookite versus anatase TiO2 photocatalysts: Phase transformations and photocatalytic activities
dc.type article
dc.type Text
dc.relation.issn 1474-905X
dc.bibliographicCitation.issue 4
dc.bibliographicCitation.volume 12
dc.bibliographicCitation.firstPage 602
dc.bibliographicCitation.lastPage 609
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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