Mesoporous zirconium titanium oxides. Part 3. Synthesis and adsorption properties of unfunctionalized and phosphonate-functionalized hierarchical polyacrylonitrile-f-127-templated beads

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dc.contributor.authorSizgek, GDen_AU
dc.contributor.authorGriffith, CSen_AU
dc.contributor.authorSizgek, Een_AU
dc.contributor.authorLuca, Ven_AU
dc.date.accessioned2010-04-08T05:37:57Zen_AU
dc.date.accessioned2010-04-30T05:08:17Zen_AU
dc.date.available2010-04-08T05:37:57Zen_AU
dc.date.available2010-04-30T05:08:17Zen_AU
dc.date.issued2009-10-06en_AU
dc.date.statistics2009-10-06en_AU
dc.description.abstractA method is presented for the preparation of zirconium titanate mixed oxides in bead form having hierarchical pore structure. This method entailed the use of both preformed polyacrylonitrile (PAN) polymer beads and surfactants as templates. The templates were removed by calcination at temperatures below about 500°C, resulting in mixed oxide beads with trimodal pore size distributions and interconnected pores. The pore size distributions as determined using nitrogen adsorption−desorption showed clear maxima at 4.5 and 45 nm length scales and also clear evidence of microporosity. The macroporous framework morphology was a replica of the PAN beads with radial structure. The mesoporous framework possessed wormhole-like pores with pore size of about 6 nm that was consistent with the F-127 triblock copolymer template used. The mixed oxide beads exhibited surface areas of 215 and 185 m2/g after calcination at 500 and 600°C. Thermal stability up to 650°C is unprecedented for bulk systems. The adsorption properties were characterized using uranyl as the target cation and the mass transport in the beads with the present hierarchical architectures has been shown to be exceptional. The beads were functionalized with 4-amino,1-hydroxy,1,1-bis-phosphonic acid (HABDP) and amino-tris-methylene phosphonic acid (ATMP) and the adsorption properties for the extraction of uranyl sulfate complexes from acidic solution examined. Of the two molecules investigated, ATMP functionalization resulted in the best extraction efficiency with equilibrium uptake of about 90% of uranium available in solution between pH 1 and 2. The beads could potentially be utilized as catalysts, catalyst supports, adsorbents, and separation materials. © 2009, American Chemical Societyen_AU
dc.identifier.citationSizgek, G. D., Griffith, C. S., Sizgek, E., & Luca, V. (2009). Mesoporous zirconium titanium oxides. Part 3. Synthesis and adsorption properties of unfunctionalized and phosphonate-functionalized hierarchical polyacrylonitrile-f-127-templated beads. Langmuir, 25(19), 11874-11882. doi:10.1021/la9015299en_AU
dc.identifier.govdoc1532en_AU
dc.identifier.issn0743-7463en_AU
dc.identifier.issue19en_AU
dc.identifier.journaltitleLangmuiren_AU
dc.identifier.pagination11874-11882en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/la9015299en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3114en_AU
dc.identifier.volume25en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectZirconiumen_AU
dc.subjectTitanium oxidesen_AU
dc.subjectPore structureen_AU
dc.subjectAdsorptionen_AU
dc.subjectPhosphonic acidsen_AU
dc.subjectUranyl sulfatesen_AU
dc.titleMesoporous zirconium titanium oxides. Part 3. Synthesis and adsorption properties of unfunctionalized and phosphonate-functionalized hierarchical polyacrylonitrile-f-127-templated beadsen_AU
dc.typeJournal Articleen_AU
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