A generalized method for high-speed fluorination of metal oxides by spark plasma sintering yields Ta3O7F and TaO2F with high photocatalytic activity for oxygen evolution from water

dc.contributor.authorLange, Martin Alexander
dc.contributor.authorKhan, Ibrahim
dc.contributor.authorOpitz, Phil
dc.contributor.authorHartmann, Jens
dc.contributor.authorAshraf, Muhammad
dc.contributor.authorQurashi, Ahsanulhaq
dc.contributor.authorPrädel, Leon
dc.contributor.authorPanthöfer, Martin
dc.contributor.authorCossmer, Antje
dc.contributor.authorPfeifer, Jens
dc.contributor.authorSimon, Fabian
dc.contributor.authorAu, Marcus von der
dc.contributor.authorMeermann, Björn
dc.contributor.authorMondeshki, Mihail
dc.contributor.authorTahir, Muhammad Nawaz
dc.contributor.authorTremel, Wolfgang
dc.date.accessioned2022-04-26T08:49:47Z
dc.date.available2022-04-26T08:49:47Z
dc.date.issued2021
dc.description.abstractA general method to carry out the fluorination of metal oxides with poly(tetrafluoroethylene) (PTFE, Teflon) waste by spark plasma sintering (SPS) on a minute scale with Teflon is reported. The potential of this new approach is highlighted by the following results. i) The tantalum oxyfluorides Ta3O7F and TaO2F are obtained from plastic scrap without using toxic or caustic chemicals for fluorination. ii) Short reaction times (minutes rather than days) reduce the process time the energy costs by almost three orders of magnitude. iii) The oxyfluorides Ta3O7F and TaO2F are produced in gram amounts of nanoparticles. Their synthesis can be upscaled to the kg range with industrial sintering equipment. iv) SPS processing changes the catalytic properties: while conventionally prepared Ta3O7F and TaO2F show little catalytic activity, SPS-prepared Ta3O7F and TaO2F exhibit high activity for photocatalytic oxygen evolution, reaching photoconversion efficiencies up to 24.7% and applied bias to photoconversion values of 0.86%. This study shows that the materials properties are dictated by the processing which poses new challenges to understand and predict the underlying factors.en_GB
dc.identifier.doihttp://doi.org/10.25358/openscience-6903
dc.identifier.urihttps://openscience.ub.uni-mainz.de/handle/20.500.12030/6914
dc.language.isoengde
dc.rightsCC-BY-NC-ND-4.0*
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subject.ddc540 Chemiede_DE
dc.subject.ddc540 Chemistry and allied sciencesen_GB
dc.titleA generalized method for high-speed fluorination of metal oxides by spark plasma sintering yields Ta3O7F and TaO2F with high photocatalytic activity for oxygen evolution from wateren_GB
dc.typeZeitschriftenaufsatzde
jgu.journal.issue20de
jgu.journal.titleAdvanced materialsde
jgu.journal.volume33de
jgu.organisation.departmentFB 09 Chemie, Pharmazie u. Geowissensch.de
jgu.organisation.nameJohannes Gutenberg-Universität Mainz
jgu.organisation.number7950
jgu.organisation.placeMainz
jgu.organisation.rorhttps://ror.org/023b0x485
jgu.pages.alternative2007434de
jgu.publisher.doi10.1002/adma.202007434de
jgu.publisher.nameWiley-VCHde
jgu.publisher.placeWeinheimde
jgu.publisher.year2021
jgu.rights.accessrightsopenAccess
jgu.subject.ddccode540de
jgu.type.dinitypeArticleen_GB
jgu.type.resourceTextde
jgu.type.versionPublished versionde

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