Spectroscopic characterization of tungstated zirconia prepared by equilibrium adsorption from hydrogen peroxide solutions of tungsten(VI) precursors

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dc.citation.epage6086en_US
dc.citation.issueNumber15en_US
dc.citation.spage6074en_US
dc.citation.volumeNumber42en_US
dc.contributor.authorKantcheva, M.en_US
dc.contributor.authorKoz, C.en_US
dc.date.accessioned2016-02-08T10:13:40Z
dc.date.available2016-02-08T10:13:40Z
dc.date.issued2007en_US
dc.departmentDepartment of Chemistryen_US
dc.description.abstractTwo series of WO x /ZrO2 samples are prepared by equilibrium adsorption from H2O2 solutions at pH 1.8 containing two different precursor anions, [W2O3(O 2)4(H2O)2]2- and [H 2W12O40]6-. The starting material is amorphous zirconium oxyhydroxide. The maximum W densities obtained are larger than that reported in the literature for systems synthesized by the same method using aqueous non-peroxide solutions. In the case of the metatungstate precursor, this increase is attributed to the generation of additional anchoring sites by interaction between the amorphous support and H2O 2. The high uptake achieved when the peroxo complex is used as a precursor is a result of both the ZrO x (OH)4-2x -H 2O2 interaction and low nuclearity of the adsorbing anion. The materials are characterized by XRD, DR-UV-vis, Micro-Raman and FT-IR spectroscopy. The surface acidities of samples with identical W loading prepared by equilibrium adsorption from the [H2W12O 40]6--H2O2 system and by impregnation with aqueous solution of ammonium metatungstate are investigated by FT-IR spectroscopy of CO adsorbed at 80 K. © Springer Science+Business Media, LLC 2007.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T10:13:40Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2007en
dc.identifier.doi10.1007/s10853-006-1159-4en_US
dc.identifier.issn0022-2461
dc.identifier.urihttp://hdl.handle.net/11693/23420
dc.language.isoEnglishen_US
dc.relation.isversionofhttp://dx.doi.org/10.1007/s10853-006-1159-4en_US
dc.source.titleJournal of Materials Scienceen_US
dc.subjectAdsorptionen_US
dc.subjectDensity (specific gravity)en_US
dc.subjectHydrogen peroxideen_US
dc.subjectNegative ionsen_US
dc.subjectTungsten compoundsen_US
dc.subjectX ray diffractionen_US
dc.subjectEquilibrium adsorptionen_US
dc.subjectPrecursor anionsen_US
dc.subjectTungstated zirconiaen_US
dc.subjectZirconium oxyhydroxideen_US
dc.subjectZirconiaen_US
dc.titleSpectroscopic characterization of tungstated zirconia prepared by equilibrium adsorption from hydrogen peroxide solutions of tungsten(VI) precursorsen_US
dc.typeArticleen_US

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