02342nas a2200217 4500008004100000245010300041210006900144260000900213490000700222520157600229100001701805700002201822700001701844700002301861700001701884700001801901700002701919700002601946700002101972856013101993 2024 eng d00aUltralight crystalline hybrid composite material for highly efficient sequestration of radioiodine0 aUltralight crystalline hybrid composite material for highly effi cFEB 0 v153 a

Considering the importance of sustainable nuclear energy, effective management of radioactive nuclear waste, such as sequestration of radioiodine has inflicted a significant research attention in recent years. Despite the fact that materials have been reported for the adsorption of iodine, development of effective adsorbent with significantly improved segregation properties for widespread practical applications still remain exceedingly difficult due to lack of proper design strategies. Herein, utilizing unique hybridization synthetic strategy, a composite crystalline aerogel material has been fabricated by covalent stepping of an amino-functionalized stable cationic discrete metal-organic polyhedra with dual-pore containing imine-functionalized covalent organic framework. The ultralight hybrid composite exhibits large surface area with hierarchical macro-micro porosity and multifunctional binding sites, which collectively interact with iodine. The developed nano-adsorbent demonstrate ultrahigh vapor and aqueous-phase iodine adsorption capacities of 9.98 g.g-1 and 4.74 g.g-1, respectively, in static conditions with fast adsorption kinetics, high retention efficiency, reusability and recovery. The development of effective adsorbents of radioiodine nuclear waste remains difficult due to the lack of proper material design strategies. Here the authors report an ultralight hierarchically porous crystalline multifunctional hybrid nanocomposite for ultrafast entrapment of iodine and polyiodide species under both static and dynamic condition.

1 aFajal, Sahel1 aMandal, Writakshi1 aTorris, Arun1 aMajumder, Dipanjan1 aLet, Sumanta1 aSen, Arunabha1 aKanheerampockil, Fayis1 aShirolkar, Mandar, M.1 aGhosh, Sujit, K. uhttps://library.ncl.res.in/content/ultralight-crystalline-hybrid-composite-material-highly-efficient-sequestration-radioiodine