Hierarchically Porous ZIF-67/Chitosan Beads with High Surface Area and Strengthened Mechanical Properties: Application to CO2 Storage - Université de Lille Accéder directement au contenu
Article Dans Une Revue Materials Today Sustainability Année : 2023

Hierarchically Porous ZIF-67/Chitosan Beads with High Surface Area and Strengthened Mechanical Properties: Application to CO2 Storage

Résumé

In this work, zeolitic imidazolate framework-67 (ZIF-67)/chitosan composite beads were prepared by immersing chitosan beads incorporating cobalt (hydr)oxide into a solution containing the organic linker (2-methylimidazole). Compared to the conventional preparation protocols for metal-organic framework/polymer beads, the in-situ growth approach developed herein allows obtaining higher surface area with the shaped composites, up to 1200 m2/g for ZIF-67/CS2:1. The CO2 adsorption capacity of these ZIF-67/chitosan beads was investigated and reached 1.21 mmol/g at 273 K, which represents almost 100% of the adsorption capacity of pure ZIF-67, in line with the preserved surface area despite the incorporation of the 19% of additives included. Importantly, the ZIF-67/chitosan beads with an average bulk (crush) strength of 1.57 N could be easily regenerated, with a retained efficiency above 97% after 6 cycles. Furthermore, a possible mechanism for CO2 adsorption is discussed.
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Dates et versions

hal-04075332 , version 1 (20-04-2023)

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Nisrine Hammi, Nelly Couzon, Thierry Loiseau, Christophe Volkringer, Abdelkrim El Kadib, et al.. Hierarchically Porous ZIF-67/Chitosan Beads with High Surface Area and Strengthened Mechanical Properties: Application to CO2 Storage. Materials Today Sustainability, 2023, Materials Today Sustainability, pp.100394. ⟨10.1016/j.mtsust.2023.100394⟩. ⟨hal-04075332⟩
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