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Constructing a highly permeable bioinspired rigid-flexible coupled membrane with a high content of spindle-type MOF: efficient adsorption separation of water-soluble pollutants
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2024-05-31 , DOI: 10.1039/d4ta02063d
Ruilong Zhang 1, 2 , Jun Zhao 2, 3 , Xiaohua Tian 1 , Jian Ye 1 , Lulu Wang 1 , Ifunanya Rejoice Akaniro 2 , Jianming Pan 1 , Jiangdong Dai 1
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2024-05-31 , DOI: 10.1039/d4ta02063d
Ruilong Zhang 1, 2 , Jun Zhao 2, 3 , Xiaohua Tian 1 , Jian Ye 1 , Lulu Wang 1 , Ifunanya Rejoice Akaniro 2 , Jianming Pan 1 , Jiangdong Dai 1
Affiliation
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In recent years, metal–organic frameworks (MOFs) have emerged as a crucial component in the design and fabrication of advanced adsorption separation membranes. The inherent rigidity of these MOF membranes, however, has limited their potential applications in the field of separation technologies. To address these limitations, MOF hybrid membranes have been developed incorporating flexible guest materials. Nevertheless, the proliferation of guest materials has imposed constraints on the advantages inherent to MOFs, and the interactions between these flexible guest materials and MOFs have impeded the progress of MOF membrane technology. Drawing inspiration from the “brick and mortar” structure characteristic of nacre, this study proposed the creation of a rigid-flexible coupled membrane. This innovative approach utilizes a spindle-type MOF as the rigid framework, graphene oxide (GO) as the flexible interlinking component, and tannic acid (TA) as the cross-linking agent. The synthesized coupled membranes (CoFe-MOF/GO–TA) demonstrated exceptional separation efficacy (>98.10%, 210–296 L m−2 h−1 bar−1) and exhibited outstanding cycling stability in the removal of water-soluble pollutants. Remarkably, after 16 cycles, the permeance to rhodamine B (RhB) was recorded at 230.11 L m−2 h−1 bar−1, with a rejection of 97.26%, underscoring the superior cycling stability of the MOF hybrid membrane. At the molecular level, the degradation mechanism of RhB was elucidated through a series of experiments and Gaussian calculations, validating the potential of MOFs in pollutant degradation. This discovery provided substantial support for the use of MOFs in the catalytic purification of membranes. Additionally, the MOF hybrid membranes exhibited comparably excellent separation capabilities for both antibiotics and dyes. The bioinspired rigid-flexible coupled membrane demonstrated a synergistic advantage, significantly enhancing the development of MOF hybrid membranes with superior separation performance and remarkable cycling stability.
中文翻译：
构建高含量纺锤型MOF的高渗透仿生刚柔耦合膜：高效吸附分离水溶性污染物
近年来，金属有机框架（MOF）已成为先进吸附分离膜设计和制造的关键组成部分。然而，这些 MOF 膜固有的刚性限制了它们在分离技术领域的潜在应用。为了解决这些限制，人们开发了包含柔性客体材料的 MOF 杂化膜。然而，客体材料的激增限制了MOF固有的优势，并且这些柔性客体材料与MOF之间的相互作用阻碍了MOF膜技术的进步。这项研究从珍珠质的“砖块和砂浆”结构特征中汲取灵感，提出创建一种刚柔耦合膜。这种创新方法利用纺锤型 MOF 作为刚性框架，氧化石墨烯（GO）作为柔性互连组分，单宁酸（TA）作为交联剂。合成的耦合膜 (CoFe-MOF/GO–TA) 表现出卓越的分离效率 (>98.10%, 210–296 L m −2 h −1 bar −1 ）并在去除水溶性污染物方面表现出出色的循环稳定性。值得注意的是，16 个循环后，罗丹明 B (RhB) 的渗透率为 230.11 L m −2 h −1 bar −1 ，排斥率为 97.26% ，强调了 MOF 杂化膜卓越的循环稳定性。在分子水平上，通过一系列实验和高斯计算阐明了RhB的降解机制，验证了MOFs在污染物降解方面的潜力。这一发现为MOF在膜催化纯化中的应用提供了实质性支持。 此外，MOF杂化膜对抗生素和染料表现出相对优异的分离能力。仿生刚柔耦合膜表现出协同优势，显着促进了具有卓越分离性能和卓越循环稳定性的MOF杂化膜的开发。
更新日期：2024-05-31
中文翻译：
构建高含量纺锤型MOF的高渗透仿生刚柔耦合膜：高效吸附分离水溶性污染物
近年来，金属有机框架（MOF）已成为先进吸附分离膜设计和制造的关键组成部分。然而，这些 MOF 膜固有的刚性限制了它们在分离技术领域的潜在应用。为了解决这些限制，人们开发了包含柔性客体材料的 MOF 杂化膜。然而，客体材料的激增限制了MOF固有的优势，并且这些柔性客体材料与MOF之间的相互作用阻碍了MOF膜技术的进步。这项研究从珍珠质的“砖块和砂浆”结构特征中汲取灵感，提出创建一种刚柔耦合膜。这种创新方法利用纺锤型 MOF 作为刚性框架，氧化石墨烯（GO）作为柔性互连组分，单宁酸（TA）作为交联剂。合成的耦合膜 (CoFe-MOF/GO–TA) 表现出卓越的分离效率 (>98.10%, 210–296 L m −2 h −1 bar −1 ）并在去除水溶性污染物方面表现出出色的循环稳定性。值得注意的是，16 个循环后，罗丹明 B (RhB) 的渗透率为 230.11 L m −2 h −1 bar −1 ，排斥率为 97.26% ，强调了 MOF 杂化膜卓越的循环稳定性。在分子水平上，通过一系列实验和高斯计算阐明了RhB的降解机制，验证了MOFs在污染物降解方面的潜力。这一发现为MOF在膜催化纯化中的应用提供了实质性支持。 此外，MOF杂化膜对抗生素和染料表现出相对优异的分离能力。仿生刚柔耦合膜表现出协同优势，显着促进了具有卓越分离性能和卓越循环稳定性的MOF杂化膜的开发。
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