SMITA Research Lab, Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
J Hazard Mater. 2021 Jun 5;411:125056. doi: 10.1016/j.jhazmat.2021.125056. Epub 2021 Jan 9.
Organic pollutants, with their increasing concentrations in the ambient air, are posing a severe threat to human health. Metal-organic frameworks (MOFs), due to their active functionalities and porous nature, have emerged as potential materials for the capture of organic pollutants and cleaning of the environment/air. In this work, the functionalization of cotton fabric is reported by the in-situ growth of zeolitic imidazolate framework (ZIF-8 and ZIF-67) MOFs on carboxymethylated cotton (CM Cotton) by employing a rapid and eco-friendly approach. The physicochemical characterization of the MOF functionalized fabrics (ZIF-8@CM Cotton and ZIF-67@CM Cotton) revealed uniform and wash durable attachment of porous ZIF nanocrystals on the surface of the fabric. These ZIF functionalized fabrics possessed high surface area and have been observed to adsorb significantly high concentrations of organic pollutants such as aniline, benzene, and styrene from ambient air. Interestingly these fabrics could be regenerated and reused repeatedly without any deterioration in their adsorption capacity. The negative and low binding energies calculated by DFT confirmed the physisorption of the aromatic pollutants on the surface of MOF functionalized fabrics. Such fabrics have a huge potential as protective textiles, anti-odor clothing, air purification filters, and related products.
有机污染物在环境空气中的浓度不断增加，对人类健康构成了严重威胁。金属有机骨架（MOFs）由于其活性官能团和多孔性质，已成为捕获有机污染物和净化环境/空气的潜在材料。在这项工作中，通过采用快速环保的方法，在羧甲基化棉（CM 棉）上原位生长沸石咪唑酯骨架（ZIF-8 和 ZIF-67）MOFs，报道了棉织物的功能化。MOF 功能化织物（ZIF-8@CM 棉和 ZIF-67@CM 棉）的物理化学特性表明，多孔 ZIF 纳米晶体均匀且耐用地附着在织物表面。这些 ZIF 功能化织物具有高比表面积，并观察到它们能够从环境空气中吸附高浓度的有机污染物，如苯胺、苯和苯乙烯。有趣的是，这些织物可以在不降低吸附能力的情况下重复再生和再利用。通过 DFT 计算得出的负和低结合能证实了芳香族污染物在 MOF 功能化织物表面的物理吸附。这些织物具有作为防护纺织品、防臭服装、空气净化过滤器和相关产品的巨大潜力。
