POS7-0840
Hybridization of Functionalized Nanofibers with Porous Coordination Frameworks for Enhanced U(VI) Adsorption Capacity
Topic
S7. Innovations in Polymeric Composites: From Design and Processing to Industrial Applications
When and Where
Sep 30, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Heesuk KIM
Jinhye BAE
Presenter(s)
TaekYoung Jeong (Chungnam National University)
Co-Author(s)
Abstract
Driven by the growing demand for nuclear energy and the depletion of terrestrial uranium resources, interest in adsorbents for the extraction of uranium from seawater has increased. Over the past decades, amidoxime-based materials have been considered the most promising U(VI) adsorbents. However, their adsorption capacity and kinetics remain limited. In recent years, porous coordination frameworks (PCFs), constructed through the repetitive coordination of metal ions and organic ligands, have emerged as a research focus due to their microporous structures, large specific surface areas, and abundant adsorption sites. However, the powdered form of PCFs has limitations in reusability and practical applications. In this study, functionalized nanofibers were hybridized with PCFs to overcome these limitations of both amidoxime-based materials and PCFs. Porous PAN nanofiber was amidoximated and functionalized with PEI and EDTA (pPAO-EDTA). PCF was in situ grown on pPAO-EDTA via sequential immersion in zinc nitrate and 2-methylimidazole solutions. The integration of PCF significantly enhanced the U(VI) adsorption capacity. The adsorption performance of the adsorbents was investigated through adsorption kinetics and isotherm experiments in both U(VI)-spiked deionized water and natural seawater conditions and the data followed the Langmuir isotherm and pseudo-second-order kinetic model. Furthermore, the adsorption mechanism was elucidated by XPS analysis through the binding energy shifts before and after U(VI) adsorption.
