Metal-organic frameworks (MOFs) are versatile nanostructured materials that find applications in different fields, spanning from separation, adsorption, sensing and catalysis to health care and nanomedicine. Their association with (bio)polymers has been recognized as a milestone for their processing into scalable devices, well-suitable for applied technologies. Herein, we investigated the templating growth of HKUST-1 and ZIF-8 in a colloidal solution of different molecular weight chitosan biopolymers under various reaction conditions. Besides isolating nanostructured polysaccharide-MOF hybrids with hierarchical porosity, we also succeeded in shaping the material body as flexible films, porous monoliths and self-standing microspheres. This templating route was successfully expanded to binary chitosan-alginate and chitosan-starch colloidal solutions, which result in flexible films with enhanced molecular diversity. The preliminary assessment of Red Congo dye removal from contaminated water revealed that open-porous chitosan-MOF nanohybrids outperform microporous MOF and marginally porous chitosan. These findings open novel opportunities for the use of such functional carbohydrates as bio-based adsorbents and chemical scavengers.

金属有机框架（MOF）是通用的纳米结构材料，可在不同领域中找到应用，从分离，吸附，传感和催化到医疗保健和纳米医学。它们与（生物）聚合物的结合被认为是将其加工成可扩展设备的里程碑，非常适合应用技术。在这里，我们调查了HKUST-1和ZIF-8的模板增长在不同反应条件下，以不同分子量的壳聚糖生物聚合物的胶体溶液的形式存在。除了隔离具有分层孔隙率的纳米结构多糖-MOF杂化物外，我们还成功地将材料主体成型为柔性膜，多孔整料和自立微球。该模板路线已成功扩展到二元壳聚糖-海藻酸盐和壳聚糖-淀粉胶体溶液，从而产生具有增强的分子多样性的柔性薄膜。从污染水中去除刚果红染料的初步评估表明，开孔的壳聚糖-MOF纳米杂化物优于微孔的MOF和微孔的壳聚糖。这些发现为使用这种功能性碳水化合物作为生物基吸附剂和化学清除剂打开了新的机会。