Nanoporous zirconium phosphonate materials with enhanced chemical and thermal stability for sorbent applications

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dc.contributor.authorVeliscek-Carolan, Jen_AU
dc.contributor.authorRawal, Aen_AU
dc.contributor.authorOldfield, DTen_AU
dc.contributor.authorThorogood, GJen_AU
dc.contributor.authorBedford, NMen_AU
dc.date.accessioned2022-04-08T06:02:07Zen_AU
dc.date.available2022-04-08T06:02:07Zen_AU
dc.date.issued2020-04-01en_AU
dc.date.statistics2022-03-25en_AU
dc.description.abstractNanoporous zirconium phosphonate (ZrP) materials are considered to be promising candidates for practical applications such as catalysis and separation, in particular because of their excellent stability, resulting from the strength of the P–O–Zr bond. However, the functionality of ZrP materials is dependent on the availability of free phosphonate groups uncoordinated by zirconium, the presence of which can decrease the stability. The mechanisms by which nanoporous ZrP materials degrade and lose functionality during thermal and chemical treatment are not well understood. Herein, we address this knowledge gap using nanoporous zirconium aminotris(methylenephosphonic acid) (Zr-ATMP) sorbent materials. Thermal treatment up to 150 °C caused collapse of the nanoporous structure of some Zr-ATMP materials without a significant effect on the chemical structure. On the other hand, contact with 5 M nitric acid changed the chemical structure of the Zr-ATMP materials by catalyzing the formation of P–O–Zr bonds and elemental leaching. Enhancement of the thermal and chemical stability of the Zr-ATMP materials was achieved by decreasing the pH of the synthesis and, interestingly, changing the counterion of the hydroxide used to control the pH also impacted the structure and stability of the resulting materials. The most stable Zr-ATMP material was produced at pH 3 using LiOH, but this material demonstrated lower selectivity than other Zr-ATMP materials, which decreases its practicality for separation applications. The Zr-ATMP material synthesized at pH 3 with NaOH showed an optimal balance between the stability and sorption performance. The enhanced chemical and thermal stability of this material drastically improves its applicability for use in harsh environments, such as in the treatment of radioactive wastes. © 2020 American Chemical Societyen_AU
dc.identifier.citationVeliscek-Carolan, J., Rawal, A., Oldfield, D. T., Thorogood, G. J., & Bedford, N. M. (2020). Nanoporous zirconium phosphonate materials with enhanced chemical and thermal stability for sorbent applications. ACS Applied Nano Materials, 3(4), 3717-3729. doi:10.1021/acsanm.0c00405en_AU
dc.identifier.issn2574-0970en_AU
dc.identifier.issue4en_AU
dc.identifier.journaltitleACS Applied Nano Materialsen_AU
dc.identifier.pagination3717-3729en_AU
dc.identifier.urihttps://doi.org/10.1021/acsanm.0c00405en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12983en_AU
dc.identifier.volume3en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectSorptionen_AU
dc.subjectAnionsen_AU
dc.subjectMaterialsen_AU
dc.subjectStabilityen_AU
dc.subjectZirconium phosphatesen_AU
dc.subjectHybridizationen_AU
dc.titleNanoporous zirconium phosphonate materials with enhanced chemical and thermal stability for sorbent applicationsen_AU
dc.typeJournal Articleen_AU
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