Department of Health Sciences and Technology ETH Zurich, Schmelzbergstrasse 9, Zurich, 8092, Switzerland.
School of Food Science and Engineering, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou, 510640, China.
Small. 2022 Jan;18(4):e2105502. doi: 10.1002/smll.202105502. Epub 2021 Nov 23.
Design and fabrication of versatile adsorbents for universal water purification following green chemistry principles remain challenging. Here, it is shown that amyloid fibrils from protein waste can be used as a functional scaffold for metal organic framework (MOF) biomimetic mineralization. The resulting amyloid fibrils/ZIF-8 hybrid aerogels can effectively remove nine different heavy metal ions from water due to their hierarchical porous structure. Importantly, amyloid fibrils/ZIF-8 hybrid aerogels can efficiently remove Hg and Pb from water over five consecutive adsorption-regeneration cycles. Furthermore, a dual removal pathway of adsorption and catalytic degradation is observed in the synthetic dyes, indicating that the aerogel preserves its porous nature and maintains the integrity of versatile functional ligands within ZIF-8. Finally, it is shown that these hybrid aerogels can also perform successfully in oil-water separation. Considering the facile synthesis procedure, high removal efficiency, affordable cost, and regeneration possibilities, the amyloid fibrils/ZIF-8 hybrid aerogel stands as an ideal candidate for addressing open challenges in wastewater treatment and water purification.
设计和制造遵循绿色化学原则的通用吸附剂用于普遍的水净化仍然具有挑战性。在这里，展示了来自蛋白质废物的淀粉样纤维可以用作金属有机骨架（MOF）仿生矿化的功能支架。由于其分级多孔结构，所得的淀粉样纤维/ZIF-8 杂化气凝胶可以有效地从水中去除九种不同的重金属离子。重要的是，淀粉样纤维/ZIF-8 杂化气凝胶可以在五个连续的吸附-再生循环中有效地从水中去除 Hg 和 Pb。此外，在合成染料中观察到吸附和催化降解的双重去除途径，表明气凝胶保持其多孔性质并保持 ZIF-8 内多功能配体的完整性。最后，表明这些杂化气凝胶在油水分离中也能成功进行。考虑到简便的合成程序、高去除效率、可承受的成本和再生可能性，淀粉样纤维/ZIF-8 杂化气凝胶是解决废水处理和水净化中开放挑战的理想候选物。
