Gutenberg Open Science: Solid state fluorination on the minute scale : synthesis of WO3−xFx with photocatalytic activity

Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-6238

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DC Field	Value	Language
dc.contributor.author	Lange, Martin Alexander	-
dc.contributor.author	Krysiak, Yaşar	-
dc.contributor.author	Hartmann, Jens	-
dc.contributor.author	Dewald, Georg	-
dc.contributor.author	Cerretti, Giacomo	-
dc.contributor.author	Tahir, Muhammad Nawaz	-
dc.contributor.author	Panthöfer, Martin	-
dc.contributor.author	Barton, Bastian	-
dc.contributor.author	Reich, Tobias	-
dc.contributor.author	Zeier, Wolfgang G.	-
dc.contributor.author	Mondeshki, Mihail	-
dc.contributor.author	Kolb, Ute	-
dc.contributor.author	Tremel, Wolfgang	-
dc.date.accessioned	2021-08-05T10:03:35Z	-
dc.date.available	2021-08-05T10:03:35Z	-
dc.date.issued	2020	-
dc.identifier.uri	https://openscience.ub.uni-mainz.de/handle/20.500.12030/6248	-
dc.description.abstract	Solid state reactions are notoriously slow, because the rate-limiting step is diffusion of atoms or ions through reactant, intermediate, and product crystalline phases. This requires days or even weeks of high temperature treatment, consuming large amounts of energy. Metal oxides are particularly difficult to react, because they have high melting points. The study reports a high-speed solid state fluorination of WO3 with Teflon to the oxyfluorides WO3–xFx on a minute (<10 min) scale by spark plasma sintering, a technique that is used typically for a high-speed consolidation of powders. Automated electron diffraction analysis reveals an orthorhombic ReO3-type structure of WO3–xFx with F atom disorder as demonstrated by 19F magic angle spinning nuclear magnetic resonance spectroscopy. The potential of this new approach is demonstrated by the following results. i) Mixed- valent tungsten oxide fluorides WO3–xFx with high F content (0 < x < 0.65) are obtained as metastable products in copious amounts within minutes. ii) The spark plasma sintering technique yields WO3–xFx nanoparticles with high photocatalytic activity, whereas the corresponding bulk phases obtained by conventional solid-state (ampoule) reactions have no photocatalytic activity. iii) The catalytic activity is caused by the microstructure originating from the processing by spark plasma sintering.	en_GB
dc.language.iso	eng	de
dc.rights	CC BY-NC-ND	*
dc.rights.uri	https://creativecommons.org/licenses/by-nc-nd/4.0/	*
dc.subject.ddc	540 Chemie	de_DE
dc.subject.ddc	540 Chemistry and allied sciences	en_GB
dc.title	Solid state fluorination on the minute scale : synthesis of WO3−xFx with photocatalytic activity	en_GB
dc.type	Zeitschriftenaufsatz	de
dc.identifier.doi	http://doi.org/10.25358/openscience-6238	-
jgu.type.dinitype	article	en_GB
jgu.type.version	Published version	de
jgu.type.resource	Text	de
jgu.organisation.department	FB 09 Chemie, Pharmazie u. Geowissensch.	de
jgu.organisation.number	7950	-
jgu.organisation.name	Johannes Gutenberg-Universität Mainz	-
jgu.rights.accessrights	openAccess	-
jgu.journal.title	Advanced Functional Materials	de
jgu.journal.volume	30	de
jgu.journal.issue	13	de
jgu.pages.alternative	1909051	de
jgu.publisher.year	2020	-
jgu.publisher.name	Wiley-VCH	de
jgu.publisher.place	Weinheim	de
jgu.publisher.uri	https://doi.org/10.1002/adfm.201909051	de
jgu.publisher.issn	1616-3028	de
jgu.organisation.place	Mainz	-
jgu.subject.ddccode	540	de
jgu.publisher.doi	10.1002/adfm.201909051
jgu.organisation.ror	https://ror.org/023b0x485
Appears in collections:	JGU-Publikationen

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