School of Metallurgy and Environment, Central South University, Changsha 410083, PR China.
School of Metallurgy and Environment, Central South University, Changsha 410083, PR China; Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Changsha 410083, PR China.
J Colloid Interface Sci. 2020 Apr 1;565:465-473. doi: 10.1016/j.jcis.2020.01.035. Epub 2020 Jan 20.
Metal-organic frameworks (MOFs) based membranes with superior mechanical properties are of particular interest in purification, separation, and catalysis. Nevertheless, their fabrication still remains a grand challenge. Here, fungus hyphae (Mucor) were used as a robust scaffold to load the MOFs and induced the formation of porous and flexible membranes. ZIF-8 was used as a representative of MOFs. The ZIF-8@Mucor membrane was formed by the in-situ growth of ZIF-8 on hyphae and then a vacuum filtration of the ZIF-8/hyphae composite. ZIF-8 was effectively dispersed on the ZIF-8@Mucor membrane, and the shear modulus of ZIF-8@Mucor-3 was 864 MPa by calculation. The ZIF-8@Mucor membrane exhibited promising properties for adsorption application to remove the highly toxic Pb. The adsorption capacity of this membrane was as high as 1443.29 mg/g. Results from dynamic adsorption indicated that the penetration concentration of Pb ions was less than 5% of the original level before 80 min whereas after 160 min, penetration concentration of Pb ions was more than 90%. This study would open a new way of how to synthesize composite MOFs/bacterial membranes for energy and environment purposes.
基于金属-有机骨架（MOFs）的膜具有优异的机械性能，在纯化、分离和催化方面特别有吸引力。然而，它们的制造仍然是一个巨大的挑战。在这里，真菌菌丝（毛霉）被用作负载 MOFs 的坚固支架，并诱导形成多孔和柔性膜。ZIF-8 被用作 MOFs 的代表。ZIF-8@Mucor 膜是通过菌丝原位生长 ZIF-8 然后对 ZIF-8/菌丝复合材料进行真空过滤形成的。ZIF-8 有效地分散在 ZIF-8@Mucor 膜上，通过计算 ZIF-8@Mucor-3 的剪切模量为 864 MPa。ZIF-8@Mucor 膜在吸附应用中具有去除高毒性 Pb 的良好性能。该膜的吸附容量高达 1443.29 mg/g。动态吸附结果表明，在 80 分钟之前，Pb 离子的穿透浓度低于原始水平的 5%，而在 160 分钟之后，Pb 离子的穿透浓度超过 90%。这项研究将为如何合成用于能源和环境目的的复合 MOFs/细菌膜开辟一条新途径。
