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Porous and flexible membrane derived from ZIF-8-decorated hyphae for outstanding adsorption of Pb2+ ion.
Journal of Colloid and Interface Science ( IF 9.9 ) Pub Date : 2020-01-20 , DOI: 10.1016/j.jcis.2020.01.035
Lei Huang 1 , Bichao Wu 1 , Yanjing Wu 1 , Zhihui Yang 2 , Tao Yuan 1 , Sikpaam Issaka Alhassan 1 , Weichun Yang 2 , Haiying Wang 2 , Liyuan Zhang 3
Affiliation  

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 Pb2+. The adsorption capacity of this membrane was as high as 1443.29 mg/g. Results from dynamic adsorption indicated that the penetration concentration of Pb2+ ions was less than 5% of the original level before 80 min whereas after 160 min, penetration concentration of Pb2+ 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.

中文翻译:

ZIF-8修饰菌丝派生的多孔且柔软的膜具有出色的Pb2 +离子吸附能力。

具有优异机械性能的基于金属有机骨架(MOF)的膜在纯化,分离和催化方面特别受关注。然而,它们的制造仍然是一个巨大的挑战。在这里,真菌菌丝(Mucor)被用作坚固的支架,以加载MOF,并诱导形成多孔和柔性膜。ZIF-8用作MOF的代表。通过在菌丝上原位生长ZIF-8,然后真空过滤ZIF-8 /菌丝复合物,形成ZIF-8 @ Mucor膜。ZIF-8有效地分散在ZIF-8 @ Mucor膜上,经计算,ZIF-8 @ Mucor-3的剪切模量为864 MPa。ZIF-8 @ Mucor膜在去除高毒性Pb2 +的吸附应用中显示出良好的性能。该膜的吸附容量高达1443.29mg / g。动态吸附的结果表明,Pb2 +离子的渗透浓度小于80分钟之前的原始水平的5%,而160min之后,Pb2 +离子的渗透浓度大于90%。这项研究将开辟一种新的途径,以合成用于能源和环境目的的复合MOF /细菌膜。
更新日期:2020-01-21
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