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Adsorption properties of alpha-type layered and pillared zirconium phosphite phosphonates with high specific surface areas and porosities #MMPMID41347387
Pica M; De Paolis E; Cillo E; Gatti G; Paul G; Cala E; Olivito F; Santaniello A; Golemme G
Dalton Trans 2025[Dec]; ? (?): ? PMID41347387show ga
Single-phase mixed zirconium phosphite phosphonates with layered and pillared structures were prepared by direct reaction of a zirconyl salt and phosphorous acid with phenylphosphonic or p-xylenediphosphonic acid, respectively. Materials with different chemical compositions were prepared by changing the phosphorous acid/phosphonic acid molar ratio in the mother solution between 1 and 4. The compounds were characterised by XRPD, (31)P MAS NMR, SEM, and FTIR analyses. The adsorption/desorption properties toward nitrogen and hydrogen at 77 K and the dichloromethane (DCM) uptake from the vapor phase at 30 degrees C were studied. All materials exhibited a Specific Surface Area (SSA) of >/= 200 m(2) g(-1), due to the contribution of micro-, meso- and macropores. The estimated micropore volume, V(micro), increased with increasing SSA and affected the hydrogen uptake that reached 1.43 mmol g(-1) at 77 K with the zirconium phosphite phenylphosphonate compound having the highest V(micro) value. The DCM uptake reached 1300 mg g(-1) with the zirconium phosphite p-xylenediphosphonate having the highest macroporosity. The zirconium phosphite phenylphosphonate in the gel form was proved to disperse well in a PLA matrix, even at high filler loadings, affecting its physico-chemical properties.
Dalton+Trans 2025 ; ? (?): ?
