Shapeable Aerogels of Metal-Organic-Frameworks Supported by Aramid Nanofibrils for Efficient Adsorption and Interception
2020
The immobilization of the metal-organic frameworks (MOFs) on aerogels has risen to be a promising approach for the combination of advantages on both sides. Shapeable MOFs hybrid aerogels were obtained by the growth of MOF crystals on aramid nanofibrils (ANFs) aerogels, to retain both the high porosities, crystal structure and original stabilities of individual MOFs, and the mechanical robust, flexibility and low density of ANFs. The MOFs hybrid aerogels exhibited superior adsorption performance for organic dyes (e.g., 113.8 mg/g for methyl violet and 107 mg/g of rhodamine B), offered a simple, efficient and extensible platform for removing organic dyes from aqueous solution continuously, with high flux (620 L/(h·m2·bar) at a thickness of ~0.87 mm) and excellent rejection (>98 %). This work provided a practicable pathway to manage MOFs crystals into a shapeable and recyclable form for extended applications in wide fields.
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