Insight Studies on Metal-Organic Framework Nanofibrous Membrane Adsorption and Activation for Heavy Metal Ions Removal from Aqueous Solution

ACS Applied Materials & Interfaces
Johnson E EfomeChristopher Q Lan

Abstract

Electrospun nanofiber composite membranes containing water-stable metal-organic frameworks (MOFs) particles (Zr-based MOF-808) supported on polyacrylonitrile (PAN) nanofiber synthesized via co-electrospinning have been prepared. MOF particles were dispersed in the organic polymer, and their subsequent presence was inferred by scanning electron microscopy. Membrane performance in heavy metal ion adsorption in batch filtration was evaluated on the basis of Cd2+ and Zn2+ ions sequestration. The adsorption capacities of the pristine MOF and the MOF composite membrane revealed that MOF particles in the membrane could be accessed for adsorption in the hydrophilic PAN membranes. The maximum adsorption capacities were 225.05 and 287.06 mg g-1 for Cd2+ and Zn2+, respectively. Conventional thermal activation of pristine MOF and composite membrane revealed a crystal downsizing, while "hydractivation" produced an expanded MOF with enhanced adsorption potentials. The PAN/MOF-808 "hydractivated" composite membrane could treat 580 mL of Cd, whereas the conventional vacuum-activated composite treated 464 mL. The high separation performance and reusability of the membranes and the outstanding water stability of the MOFs suggested the developed ...Continue Reading

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Sep 22, 2020·Chemical Society Reviews·Xuan ZhangOmar K Farha
Sep 26, 2020·Environmental Science and Pollution Research International·Lata RaniPooja Mahajan
Apr 10, 2019·Polymers·Yan-Qing LiuJi-Huan He
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Jan 29, 2020·Ecotoxicology and Environmental Safety·Xiaoniu Yu, Jianguo Jiang
Jun 11, 2020·Ecotoxicology and Environmental Safety·Linzhu SunXiaoniu Yu

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