Ion solvation as a predictor of lanthanide adsorption structures and energetics in alumina nanopores.

ABSTRACT: Adsorption reactions at solid-water interfaces define elemental fate and transport and enable contaminant clean-up, water purification, and chemical separations. For nanoparticles and nanopores, nanoconfinement may lead to unexpected and hard-to-predict products and energetics of adsorption, compared to analogous unconfined surfaces. Here we use X-ray absorption fine structure spectroscopy and operando flow microcalorimetry to determine nanoconfinement effects on the energetics and local coordination environment of trivalent lanthanides adsorbed on Al₂O₃ surfaces. We show that the nanoconfinement effects on adsorption become more pronounced as the hydration free energy, ΔG_hydr, of a lanthanide decreases. Neodymium (Nd³⁺) has the least exothermic

SUBMITTER: Ilgen AG 

PROVIDER: S-EPMC10444809 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature