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Poster De Conférence Année : 2023

CS@HKUST-1 xerogels: Composite materials with enhanced properties for the CO2 adsorption and catalytic oxidation reactions

Résumé

Metal Organic Frameworks (MOFs) is a class of porous materials that emerged in the 2000s. these materials has invaded several fields of chemistry thanks to their high porosity and structural flexibility. However, their use in industrial fields remains limited due to their difficult processing, their low chemical and thermal stability, as well as their microporosity which limits the diffusion of large molecules. The combination of MOFs with polysaccharides such as chitosan is one of the strategies adapted to overcome these limitations and to obtain composites in different forms like microspheres [1]. According to several studies reporting the use of chitosan for the growth of MOFs in the form of microspheres, it is commonly reported that a supercritical CO2 drying step is strongly required in order to avoid the porous structure collapse [1,2]. Despite its numerous advantages, this drying method also has some disadvantages: high cost and long processing time. In our studies, HKUST-1 was chosen as one of the most studied MOFs to grow in a chitosan matrix under mild conditions. Herein and just after a simple atmospheric drying it was possible to synthesize strong xerogels with high crystallinity and a specific surface area exceeding 800 m2g-1, which has never been obtained for CS@HKUST-1 systems even after sophisticated supercritical drying or freeze-drying steps.
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Dates et versions

hal-04400282 , version 1 (17-01-2024)

Identifiants

  • HAL Id : hal-04400282 , version 1

Citer

Yassine Khadiri, Christophe Volkringer, Aïcha Anouar, Sebastien Royer, Abdelkrim El Kadib, et al.. CS@HKUST-1 xerogels: Composite materials with enhanced properties for the CO2 adsorption and catalytic oxidation reactions. EUROMOF 2023, Sep 2023, Grenade, Spain. ⟨hal-04400282⟩
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