An initial demonstration of hierarchically porous niobium alkylphosphonates coordination polymers as potent radioanalytical separation materials

Lv, Kai; Yang, Chu‐Ting; Han, Jun; Hu, Sheng; Wang, Xiaolin

doi:10.1016/j.chroma.2017.05.013

Cited by 11 publications

(5 citation statements)

References 35 publications

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“…Rarely, the large spheroidal Sn-DTPMP nanoparticles (NPs) with micrometric pores appear to have incorporated tiny moieties during dissolution. This phenomenon was presumably driven by the minimization principle of surface free energy of inorganic layers, which hold abundant metastable defects and create active external surface areas as previously reported niobium(V) alkylphosphonates [ 16 ]. The Sn-ATMP demonstrates dense agglomeration with amorphous voids in the meso regime and their intraparticle apertures evolve into atypical cavities concurrent with the detachment of secondary nanoplates upon corrosions ( Figure 1 b).…”

Section: Resultsmentioning

confidence: 85%

“…The distribution coefficient (Kd, mL∙g −1 ) and separation factor (SF, a.u.) are defined as previously described [ 16 ].…”

Section: Methodsmentioning

confidence: 99%

“…Hierarchically porous UMPFs (HP-UMPFs) had introduced a set of mesopores/macropores that readily provide accessible selectivity and lend their uses to miscellaneous applications compared with microporous counterparts [ 14 ]. Tin and niobium-based HP-UMPFs have demonstrated excellent enrichment of Th 4+ , UO 2 2+ or lanthanides from radionuclide surrogates, which hold great potential for radioanalytical separation [ 15 , 16 ]. However, hierarchically porous materials have large pore voids that are intrinsically metastable, leading to pore size enlargement and structural stability rarely being achieved together [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

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The Hydrolytic Stability and Degradation Mechanism of a Hierarchically Porous Metal Alkylphosphonate Framework

Yang

Liu

et al. 2018

Nanomaterials

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To aid the design of a hierarchically porous unconventional metal-phosphonate framework (HP-UMPF) for practical radioanalytical separation, a systematic investigation of the hydrolytic stability of bulk phase against acidic corrosion has been carried out for an archetypical HP-UMPF. Bulk dissolution results suggest that aqueous acidity has a more paramount effect on incongruent leaching than the temperature, and the kinetic stability reaches equilibrium by way of an accumulation of a partial leached species on the corrosion conduits. A variation of particle morphology, hierarchical porosity and backbone composition upon corrosion reveals that they are hydrolytically resilient without suffering any great degradation of porous texture, although large aggregates crack into sporadic fractures while the nucleophilic attack of inorganic layers cause the leaching of tin and phosphorus. The remaining selectivity of these HP-UMPFs is dictated by a balance between the elimination of free phosphonate and the exposure of confined phosphonates, thus allowing a real-time tailor of radionuclide sequestration. Moreover, a plausible degradation mechanism has been proposed for the triple progressive dissolution of three-level hierarchical porous structures to elucidate resultant reactivity. These HP-UMPFs are compared with benchmark metal-organic frameworks (MOFs) to obtain a rough grading of hydrolytic stability and two feasible approaches are suggested for enhancing their hydrolytic stability that are intended for real-life separation protocols.

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Section: Resultsmentioning

confidence: 85%

“…The distribution coefficient (Kd, mL∙g −1 ) and separation factor (SF, a.u.) are defined as previously described [ 16 ].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Hydrolytic Stability and Degradation Mechanism of a Hierarchically Porous Metal Alkylphosphonate Framework

Yang

Liu

et al. 2018

Nanomaterials

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“…Porous nanoarchitectured materials − consisting of metal phosphates and phosphonates can offer huge opportunities in energy, environment and biomedical research. Due to the strong affinity between the metal cations and phosphate/phosphonate based ligands − a wide spectrum of porous nanomaterials can be designed.…”

Section: Introductionmentioning

confidence: 99%

Nanoarchitectured Metal Phosphates and Phosphonates: A New Material Horizon toward Emerging Applications

et al. 2019

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Metal phosphate- and phosphonate-based nanoarchitectured materials offer a unique opportunity to design hierarchically porous nanomaterials consisting of interconnected micropores, mesopores, and macropores. Due to their strong affinity toward the metal centers, the phosphate and phosphonate moieties act as ligand sites/linkers to form a wide spectrum of nanoarchitectured materials. In this review, we have summarized the synthetic routes in designing key microporous and mesoporous phosphate and phosphonate molecular sieves. Designing novel nanoarchitectures of metal phosphate- and phosphonate-based microporous and mesoporous materials for catalysis, adsorption, optoelectronics, electrochemical cells, fuel cells, and biomedical applications will further enrich the chemistry of these porous solids in the future.

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“…Besides, actinide-laden MPFs can be exploited as a stable primary waste form without an energy-consuming conversion to metal phosphate or oxide waste forms before final disposal . Heretofore, the alkyl-phosphonate-based MPFs have demonstrated potential in radioanalytical separation − and nuclear wastewater treatment, − while the aryl-phosphonate-based MPFs were utilized to remove lanthanides and actinides from acidic solutions. − …”

mentioning

confidence: 99%

Crystalline versus Amorphous: High-Performance Hafnium Phosphonate Framework for the Separation of Uranium and Transuranium Elements

Xiong

et al. 2023

Inorg. Chem.

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Metal phosphonate frameworks (MPFs) consisting of tetravalent metal ions and aryl-phosphonate ligands feature a large affinity for actinides and excellent stabilities in harsh aqueous environments. However, it remains elusive how the crystallinity of MPFs influences their performance in actinide separation. To this end, we prepared a new category of porous, ultrastable MPF with different crystallinities for uranyl and transuranium separation. The results demonstrated that crystalline MPF was generally a better adsorbent for uranyl than the amorphous counterpart and ranked as the top-performing one for uranyl and plutonium in strong acidic solutions. A plausible uranyl sequestration mechanism was unveiled by using powder X-ray diffraction in tandem with vibrational spectroscopy, thermogravimetry, and elemental analysis.

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An initial demonstration of hierarchically porous niobium alkylphosphonates coordination polymers as potent radioanalytical separation materials

Cited by 11 publications

References 35 publications

The Hydrolytic Stability and Degradation Mechanism of a Hierarchically Porous Metal Alkylphosphonate Framework

The Hydrolytic Stability and Degradation Mechanism of a Hierarchically Porous Metal Alkylphosphonate Framework

Nanoarchitectured Metal Phosphates and Phosphonates: A New Material Horizon toward Emerging Applications

Crystalline versus Amorphous: High-Performance Hafnium Phosphonate Framework for the Separation of Uranium and Transuranium Elements

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