Template synthesis and adsorption properties of hierarchically porous zirconium titanium oxides

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dc.contributor.authorDrisko, GLen_AU
dc.contributor.authorLuca, Ven_AU
dc.contributor.authorSizgek, Een_AU
dc.contributor.authorScales, Nen_AU
dc.contributor.authorCaruso, RAen_AU
dc.date.accessioned2010-04-06en_AU
dc.date.accessioned2010-04-30T05:09:07Zen_AU
dc.date.available2010-04-06en_AU
dc.date.available2010-04-30T05:09:07Zen_AU
dc.date.issued2009-05-05en_AU
dc.date.statistics2009-05-05en_AU
dc.description.abstractHierarchical morphologies in metal oxides are advantageous for many applications, including controlled drug release, photocatalysis, catalysis, synthetic biomaterials, and adsorption and separation technologies. In this study, agarose gel has been used as a template to prepare zirconium titanium mixed oxide pellets with bimodal porosity. Sol−gel chemistry conducted within the agarose gel produced "coral-like" interconnected networks of oxide nanoparticles with controllable quantities of zirconium and titanium. The materials were characterized using N2 sorption, extended X-ray absorption fine structure, X-ray diffraction, TEM, SEM, zeta potential, and thermogravimetric analysis (to measure surface hydroxyl group density). The oxides were then tested for the adsorption of vanadyl and vanadate to determine which Zr mole fraction exhibited the highest capacity and fastest kinetics. The material containing 25 mol % Zr exhibited the highest surface area (322 ± 8 m2/g) of the compositions investigated and also displayed a superior adsorption rate and capacity. Vanadate adsorption occurred with faster kinetics than did vanadyl adsorption. A comparative study demonstrated that the macro/meso pore structure had improved transport properties over a monomodal mesopore structure of similar Zr/Ti composition. The faster vanadate adsorption kinetics is attributed to enhanced surface accessibility in a hierarchical material. © 2009, American Chemical Societyen_AU
dc.identifier.citationDrisko, G. L., Luca, V., Sizgek, E., Scales, N., & Caruso, R. A. (2009). Template synthesis and adsorption properties of hierarchically porous zirconium titanium oxides. Langmuir, 25(9), 5286-5293. doi:10.1021/la804030hen_AU
dc.identifier.govdoc1587en_AU
dc.identifier.issn0743-7463en_AU
dc.identifier.issue9en_AU
dc.identifier.journaltitleLangmuiren_AU
dc.identifier.pagination5286-5293en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/la804030hen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3032en_AU
dc.identifier.volume25en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectTitanium oxidesen_AU
dc.subjectZirconiumen_AU
dc.subjectPorous materialsen_AU
dc.subjectAdsorptionen_AU
dc.subjectSynthesisen_AU
dc.subjectSol-gel processen_AU
dc.titleTemplate synthesis and adsorption properties of hierarchically porous zirconium titanium oxidesen_AU
dc.typeJournal Articleen_AU
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