MOFs compounds with open metal sites, particularly Cu-BTC, have great potential for adsorption and catalysis applications. However, the powdery morphology limits their applications. One of the almost new ways to overcome this problem is to trap them in a standing and flexible aerogel matrix to form a hierarchical porous composite. In this work, Cu-BTC/CNC (crystalline nanocellulose) and Cu-BTC/NFC (nanofibrillated cellulose) aerogel composites were synthesized using a direct mixing method by the addition of Cu-BTC powder to the liquid precursor solution followed by gelation and freeze-drying. Also, pure nanocellulose aerogels (CNC and NFC aerogels) have been synthesized from cellulose isolated from peanut shells. Scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectra, and X-ray diffraction (XRD) were utilized to evaluate the structure and morphology of the prepared materials. The adsorption ability of pure CNC aerogel and Cu-BTC/NFC aerogel composite for organic dye (Congo Red) and heavy metal ion (Mn⁷⁺) was studied and determined by the UV–Vis spectrophotometry and inductively-coupled plasma optical emission spectrometry (ICP-OES), respectively. It was concluded that Cu-BTC/NFC aerogel composite shows excellent adsorption capacity for Congo Red. The adsorption process of this composite is better described by the pseudo-second-order kinetic model and Langmuir isotherm, with a maximum monolayer adsorption capacity of 39 mg/g for Congo Red. Nevertheless, CNC aerogel shows no adsorption for Congo Red. Both CNC aerogel and Cu-BTC/NFC aerogel composite act as a monolith standing solid reducer, which means they could remove permanganate ions from water by reducing it into manganese dioxide without releasing any secondary product in the solution.

具有开放金属位点的 MOFs 化合物，尤其是 Cu-BTC，具有巨大的吸附和催化应用潜力。然而，粉状形态限制了它们的应用。克服这个问题的一种几乎新的方法是将它们捕获在固定的柔性气凝胶基质中，以形成分层多孔复合材料。在这项工作中，Cu-BTC/CNC（结晶纳米纤维素）和 Cu-BTC/NFC（纳米原纤化纤维素）气凝胶复合材料使用直接混合法通过将 Cu-BTC 粉末添加到液体前体溶液中，然后凝胶化和冷冻来合成-烘干。此外，从花生壳中分离的纤维素合成了纯纳米纤维素气凝胶（CNC 和 NFC 气凝胶）。扫描电子显微镜 (SEM)、傅里叶变换红外 (FT-IR) 光谱，和X射线衍射（XRD）被用来评估所制备材料的结构和形貌。纯CNC气凝胶和Cu-BTC/NFC气凝胶复合材料对有机染料（刚果红）和重金属离子（Mn）的吸附能力⁷⁺ ) 分别通过紫外-可见分光光度法和电感耦合等离子体发射光谱法 (ICP-OES) 进行研究和测定。得出的结论是，Cu-BTC/NFC 气凝胶复合材料对刚果红表现出优异的吸附能力。这种复合材料的吸附过程可以通过伪二级动力学模型和朗缪尔等温线更好地描述，刚果红的最大单层吸附容量为 39 mg/g。尽管如此，CNC 气凝胶对刚果红没有吸附作用。CNC 气凝胶和 Cu-BTC/NFC 气凝胶复合材料都作为整体式固体还原剂，这意味着它们可以通过将水中的高锰酸根离子还原成二氧化锰来去除水中的高锰酸根离子，而不会在溶液中释放任何副产物。