Investigating intermolecular interactions among CO₂, water and PEEK-ionene membrane using cryo ToF-SIMS and isotopic labeling.

ABSTRACT: Cryogenic time-of-flight secondary ion mass spectrometry (cryo ToF-SIMS) has emerged as a powerful tool for investigating molecular interactions, speciation, and dynamics in materials for CO₂ capture. In this study, we apply cryo ToF-SIMS to probe interactions between CO₂, water, and PEEK-ionene membranes-a promising material for direct CO₂ capture due to its selectivity, durability, and efficiency. Despite this potential, the mechanisms governing CO₂ diffusion and the influence of water vapor on CO₂ behavior remain unclear. To address this, we loaded PEEK-ionene membranes with ¹³CO₂ and D₂O and employed cryo ToF-SIMS to visualize the 3D distribution of CO₂ and water within the membrane. Whil

SUBMITTER: Yao J 

PROVIDER: S-EPMC11949930 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature