Abstract：
Assembling microscopic metal-organic frameworks into macroscopic polymeric scaffolds to develop highly renewable materials has been a promising yet challenging area of research. Herein, chitosan (CS) blended with nano-cellulose (NC) was unidirectionally transformed into an aerogel with oriented macropores and then biomineralized with zeolite imidazolate frameworks-8 (ZIF-8) to form a hierarchical structured chitosan-nanocellulose/zeolite imidazolate frameworks-8 (CS-NC-ZIF-8) hybrid aerogel. Incorporating ZIF-8 significantly increases the versatility and mechanical strength with a Young\'s modulus of 14.18 MPa of the CS-NC aerogel. The incorporation of ZIF-8 into the aerogel not only enhances its adsorption capacity for methylene blue, rhodamine B, acid fuchsin, and methyl orange, but also facilitates the generation of electrons from water that can be transferred to degrade > 90 % of malachite green within 90 min in each catalytic cycle, and this capability was maintained for at least 10 consecutive cycles. Remarkably, the hybrid aerogel was highly renewable after the adsorption of cationic dyes and catalytic removal of malachite green. With its facile production process, high removal efficiency, affordable and green nature, and excellent regeneration feasibility, the CS-NC-ZIF-8 aerogel stands as a promising solution for addressing challenges associated with dye-contaminated water treatment.
摘要：
将微观金属有机框架组装到宏观聚合物支架中以开发高度可再生的材料一直是一个有前途但具有挑战性的研究领域。在这里，与纳米纤维素（NC）共混的壳聚糖（CS）被单向转化为具有定向大孔的气凝胶，然后用咪唑甲酸酯骨架8（ZIF-8）进行生物矿化，形成分层结构的壳聚糖-纳米纤维素/沸石咪唑甲酸酯骨架8（CS-NC-ZIF-8）杂化气凝胶。结合ZIF-8显著提高了CS-NC气凝胶的杨氏模量为14.18MPa的通用性和机械强度。在气凝胶中掺入ZIF-8不仅提高了其对亚甲蓝的吸附能力,罗丹明B,酸性品红,还有甲基橙,而且还有利于从水中产生电子，在每个催化循环中90分钟内可以转移到降解>90％的孔雀石绿，并且这种能力保持至少10个连续循环。值得注意的是,杂化气凝胶在吸附阳离子染料和催化去除孔雀石绿后具有高度可再生性。凭借其简便的生产工艺，去除效率高，实惠和绿色自然，和优异的再生可行性，CS-NC-ZIF-8气凝胶是解决与染料污染水处理相关的挑战的有前途的解决方案。
