Article
Engineering, Chemical
Mi Xu, Haozhen Dou, Feifei Peng, Na Yang, Xiaoming Xiao, Xiaowei Tantai, Yongli Sun, Bin Jiang, Luhong Zhang
Summary: This study develops stable copper-decorated deep eutectic solvent based supported liquid membranes (Cu-DESMs) for efficient ethylene/ethane separation, which exhibit high permeability and selectivity, along with long-term stability.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Review
Chemistry, Multidisciplinary
Haozhen Dou, Mi Xu, Baoyu Wang, Zhen Zhang, Guobin Wen, Yun Zheng, Dan Luo, Lei Zhao, Aiping Yu, Luhong Zhang, Zhongyi Jiang, Zhongwei Chen
Summary: Microporous framework membranes, including MOF membranes and COF membranes, offer great potential to address the tradeoff between membrane permeability and selectivity, making them promising candidates for future membrane technology. The past five years have seen a surge in novel membrane materials and applications in this field.
CHEMICAL SOCIETY REVIEWS
(2021)
Review
Chemistry, Inorganic & Nuclear
Ting Chen, Dan Zhao
Summary: Metal-organic frameworks (MOFs) are porous crystalline materials constructed by metal clusters and organic linkers. Recent research has focused on the development of engineered forms of MOFs, particularly MOF-based membranes for molecular separations. This review highlights the advances in post-synthetic modification of MOFs and their membranes for enhanced separation performance. Post-synthetic modification methods are categorized and examples of modified MOF membranes are discussed. The contributions of post-synthetic modification to improved molecular separation performance are emphasized, along with the challenges and opportunities for practical applications of MOF membranes.
COORDINATION CHEMISTRY REVIEWS
(2023)
Review
Chemistry, Physical
Shuyue Jia, Dongxiao Ji, Liming Wang, Xiaohong Qin, Seeram Ramakrishna
Summary: This review introduces the research progress in the fabrication of metal-organic framework (MOF) membranes, including the preparation of pure MOF membranes and the incorporation of MOFs into polymer matrix. Through the analysis of classic cases, the advantages and disadvantages of different preparation strategies and products are compared, providing general knowledge for the needs of different application scenarios. The important role that MOF membranes play in the applications of separation, adsorption, and catalysis is highlighted, along with the opportunities and challenges in this new era.
Article
Multidisciplinary Sciences
Shuvo Jit Datta, Alvaro Mayoral, Narasimha Murthy Srivatsa Bettahalli, Prashant M. Bhatt, Madhavan Karunakaran, Ionela Daniela Carja, Dong Fan, Paulo Graziane M. Mileo, Rocio Semino, Guillaume Maurin, Osamu Terasaki, Mohamed Eddaoudi
Summary: This study reports a highly efficient method for separating hydrogen sulfide and carbon dioxide from natural gas using mixed-matrix metal-organic framework membranes. The membranes, designed and constructed with specific structures, showed exceptional separation performance under practical working conditions. This approach has the potential to translate other key adsorbents into processable matrix.
Article
Engineering, Chemical
Kun Yang, Yujie Ban, Weishen Yang
Summary: This study introduces layered MOF membranes modified with ionic liquid/AgBF4 composite for olefin/paraffin separation, showing impressive separation performances for mixed gases.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Hae-Kwon Jeong
Summary: Metal-organic frameworks (MOFs) are a new class of nanoporous materials that have attracted significant research interest. They may provide unprecedented opportunities for producing ultrathin and tuneable molecular sieve membranes for gas separations.
Article
Multidisciplinary Sciences
Ryan M. DuChanois, Mohammad Heiranian, Jason Yang, Cassandra J. Porter, Qilin Li, Xuan Zhang, Rafael Verduzco, Menachem Elimelech
Summary: This study investigates the impact of ion-membrane binding energy on the permeability of polymeric membranes, demonstrating that tailoring the binding energy and minimizing the membrane thickness can significantly enhance the selectivity of the membranes.
Article
Engineering, Chemical
Won Hee Lee, Jong Geun Seong, Joon Yong Bae, Ho Hyun Wang, Sun Ju Moon, Jun Tae Jung, Yu Seong Do, Hoseong Kang, Chi Hoon Park, Young Moo Lee
Summary: The study demonstrates the development of nanoporous and rigid semi interpenetrating polymer networks (SIPNs) with enhanced gas transport efficiency and improved resistance to plasticization against condensable gases. The optimization of microporous structure by incorporating crosslinked networks into polymer matrices shows wide applicability of polymer membranes for aggressive gas separations.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Jing Guo, Yanqiu Zhang, Fan Yang, Bhekie B. B. Mamba, Jun Ma, Lu Shao, Shaomin Liu
Summary: A new posterior interfacial polymerization (p-IP) strategy is reported, in which a tailor-made polyamide (PA) network is constructed in situ in a two-dimensional graphene oxide (GO) membrane to enhance size exclusion and repel metal ions. This strategy addresses global water scarcity by achieving superior metal ion rejection and high permeance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Chemical
Mohamad Rezi Abdul Hamid, Yutian Qian, Ruicong Wei, Zhen Li, Yichang Pan, Zhiping Lai, Hae-Kwon Jeong
Summary: Metal-organic frameworks (MOFs) membranes hold great research value in gas separations, with zeoliticimidazolate frameworks (ZIFs) being the most widely studied. Other MOF membranes have also been researched for hydrogen purification and carbon capture. Engineering challenges such as cost, design, stability, and reproducibility are key considerations for the industrial scale-up of MOF membranes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Jingyi Wang, Yilun Zhou, Xiaolu Liu, Qing Liu, Mengjie Hao, Suhua Wang, Zhongshan Chen, Hui Yang, Xiangke Wang
Summary: This review summarizes the controlled strategies for MOF membrane synthesis, their characteristics, and applications in gas and liquid separations, while pointing out challenges and future prospects.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Review
Biochemistry & Molecular Biology
Seong-Joong Kim, YongSung Kwon, DaeHun Kim, Hosik Park, Young Hoon Cho, Seung-Eun Nam, You-In Park
Summary: CMS membranes are developed to replace or support energy-intensive cryogenic distillation for olefin/paraffin separation. Different polymer precursors lead to varying structures and performances of CMS membranes for olefin/paraffin separation. The effects of incorporating inorganic materials into polymer precursors and the pyrolysis process on the properties of CMS membranes are reviewed, along with prospects and future directions for olefin/paraffin separation using CMS membranes and aging issues.
Article
Engineering, Chemical
Li-Cheng Jheng, Jaesung Park, Hee Wook Yoon, Fang-Ching Chang
Summary: This study successfully enhanced the gas separation performance of mixed matrix membranes, especially in CO2-related separation, by controlling the morphology of the materials. It was found that adding UiO-66 metal-organic frameworks and co-continuous structures significantly increased the CO2 permeability of the mixed matrix membranes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Materials Science, Multidisciplinary
Jun Lu, Huanting Wang
Summary: Ion sieving at the angstrom scale has been a research focus in the past decade, with recent studies showing that porous framework materials exhibit excellent ion transport and selectivity, mimicking the functions of biological ion channels.
Review
Electrochemistry
Jiandang Xue, Junfeng Zhang, Xin Liu, Tong Huang, Haifei Jiang, Yan Yin, Yanzhou Qin, Michael D. Guiver
Summary: This review focuses on the recent advances in alkaline-stable AEM development, with a particular emphasis on the outstanding performance of cQA-based AEMs in alkaline stability. The classification of different types of cQAs and discussions on improving structural design for enhanced AEM stability are highlighted in the article.
ELECTROCHEMICAL ENERGY REVIEWS
(2022)
Article
Multidisciplinary Sciences
Xueling Wang, Qiang Lyu, Tiezheng Tong, Kuo Sun, Li-Chiang Lin, Chuyang Y. Tang, Fenglin Yang, Michael D. Guiver, Xie Quan, Yingchao Dong
Summary: The study introduces an intra-crystalline defect engineering strategy to design a high-performance stable metal-organic framework membrane for effective treatment of hypersaline waters, achieving both excellent salt rejection and high water flux. Molecular dynamics simulations reveal the positive role of defects in enhancing structural hydrophilicity and enabling ultra-fast water transport, paving the way for the rational design of next-generation MOF membranes with enhanced permeation performance.
NATURE COMMUNICATIONS
(2022)
Article
Energy & Fuels
Hongying Tang, Kang Geng, Lei Wu, Junjie Liu, Zhiquan Chen, Wei You, Feng Yan, Michael D. Guiver, Nanwen Li
Summary: Researchers have developed a new type of fuel cell membrane that can operate over a wider temperature range, from -20 to 200 degrees C. This ultramicroporous membrane retains phosphoric acid even under highly humidified conditions and exhibits higher proton conductivity retention compared to conventional membranes. This innovation could simplify heat and water management in fuel cell systems, potentially reducing costs.
Article
Chemistry, Multidisciplinary
Tong Huang, Haifei Jiang, John C. C. Douglin, Yu Chen, Shuoyao Yin, Junfeng Zhang, Xiaojuan Deng, Hong Wu, Yan Yin, Dario R. R. Dekel, Michael D. D. Guiver, Zhongyi Jiang
Summary: This study reports the synthesis of charged COF-NSs in open space using a single-phase organic solution system, achieving high volume yields. Charge-induced electrostatic repulsion forces enable the growth of large and crystalline COF-NSs from initial discrete and disordered polymers. The charged COF-NS colloidal suspensions can be cast into thin and compact proton exchange membranes with excellent proton conductivity and fuel cell performance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Yuhan Wang, Haifei Jiang, Zheyuan Guo, Hanze Ma, Shaoyu Wang, Hongjian Wang, Shuqing Song, Junfeng Zhang, Yan Yin, Hong Wu, Zhongyi Jiang, Michael D. Guiver
Summary: This article discusses the progress in advanced organic microporous membranes for carbon emission reduction and capture, focusing on confined mass transport mechanisms, design principles, and CO2 separation applications. The authors analyze the abnormal confinement effect in organic microporous membrane channels and propose design principles such as nano-assembly engineering, reticular engineering, and microenvironment engineering. They also summarize four categories of organic microporous membrane materials, namely polymers of intrinsic microporosity, graphene oxide, metal-organic framework, and covalent organic framework. Lastly, the article provides a perspective on the opportunities and challenges for the transition from advanced membranes to real-world applications.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Shaoyu Wang, Yuhan Yang, Xu Liang, Yanxiong Ren, Hanze Ma, Ziting Zhu, Jianyu Wang, Shichen Zeng, Shuqing Song, Xuerui Wang, You Han, Guangwei He, Zhongyi Jiang
Summary: A polyelectrolyte-mediated assembly (PMA) strategy is developed to fabricate ultrathin ionic covalent organic framework (COF) membrane for efficient CO2 separation. The resulting COF membranes exhibit high CO2 permeance and selectivity for stimulated flue gas. This PMA strategy may open up a new avenue to fabricate ultrathin 2D material membranes for diverse applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
De Ao, Zibo Yang, Zhihua Qiao, Yuxiu Sun, Zhengqing Zhang, Michael D. Guiver, Chongli Zhong
Summary: A self-supported MOF crystal-glass composite (CGC) membrane was prepared by melt quenching ZIF-62 and ZIF-8 mixture. The membrane exhibited improved gas permeance and selectivity due to its unique structure. The thickness of the membrane can be adjusted without the need of a support substrate.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Environmental
Weisheng Yu, Chengpeng Wei, Kaiyu Zhang, Jianjun Zhang, Zijuan Ge, Xian Liang, Michael D. Guiver, Xiaolin Ge, Liang Wu, Tongwen Xu
Summary: In this study, a 4-sulfocalix[4]arene (4-SCA)-modified graphene oxide (GO) membrane was successfully fabricated, which exhibited high ion permeability and selectivity, as well as pH-responsiveness. The membrane preferentially transported potassium ions over radionuclide cations and showed an order of magnitude higher ion selectivity than the unmodified GO membrane. The improved selectivity resulted from the specific recognition between 4-SCA and radionuclide cations, which was responsive to the protonation/deprotonation transformation of 4-SCA. This biomimetic permselective GO membrane has potential applications in efficient nuclear wastewater treatment and contributes to a deeper understanding of biomimetic ion transport mechanisms.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Yabiao Pei, Weikang Zhu, Runfei Yue, Jie Yao, Xin Liu, Lianqin Wang, Junfeng Zhang, Yan Yin, Michael D. Guiver
Summary: Adjusting the catalyst/ionomer agglomerate is crucial for high-performance catalyst layers, especially for non-precious metal catalysts. The solvent, as a sacrificial component, plays a vital role in determining the microstructure and performance of anion exchange membrane fuel cells (AEMFCs) during the formation process of the catalyst layer. By studying solvent mixtures of isopropanol (IPA) and tetrahydrofuran (THF), a control-lable construction of Co/Fe-N-C catalyst layers was achieved. The results show that the ratio of IPA and THF strongly affects the aggregate state and microstructure of the ionomers and catalysts, and the Co/Fe-N-C catalyst layer prepared with IPA:THF = 1:2 (v/v) exhibits a high performance AEMFC with a peak power density of 545.3 mW cm-2 at 80 degrees C.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Zibo Yang, Youssef Belmabkhout, Lauren N. McHugh, De Ao, Yuxiu Sun, Shichun Li, Zhihua Qiao, Thomas D. Bennett, Michael D. Guiver, Chongli Zhong
Summary: A new amorphous glass foam material called a(gf)ZIF-62 was developed for gas separation, which exhibits ultrahigh permeance and good selectivity. This material has the potential to greatly reduce the cost of difficult industrial gas separations, such as CH4/N-2 separation.
Article
Chemistry, Multidisciplinary
Weikang Zhu, Yabiao Pei, Haotian Liu, Runfei Yue, Shilin Ling, Junfeng Zhang, Xin Liu, Yan Yin, Michael D. Guiver
Summary: A Co-based zeolitic imidazolate framework (ZIF-67) derived catalyst with ultrafine CoPt nanoalloy particles was designed to achieve a robust oxygen reduction reaction (ORR) performance for proton exchange membrane fuel cell (PEMFC). The core-shell structure of ZIF-67 and SiO2 was adjusted to inhibit the agglomeration of Co nanoparticles. The in situ formed graphene shell on the surface of Co nanoparticles further protected metal particles from coalescence, leading to the ultrafine CoPt nanoalloy. This work provides a viable strategy for designing Pt-based nanoalloy catalysts with ultrafine metal particles and high stability.
Article
Chemistry, Multidisciplinary
Caijiao Yu, Xixi Cen, Zhengqing Zhang, Yuxiu Sun, Wenjuan Xue, Zhihua Qiao, Michael D. Guiver, Chongli Zhong
Summary: In this study, a new strategy of step-nucleation in situ self-repair was proposed to prepare large-area ultrathin and rollable MOF membranes on a flexible polymer membrane support. This strategy enables the practical implementation of large-area MOF membranes and has potential applications in gas separation.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Weikang Zhu, Haotian Liu, Yabiao Pei, Tao Liu, Junfeng Zhang, Xin Liu, Lianqin Wang, Yingjie Feng, Yan Yin, Michael D. Guiver
Summary: A defective zeolitic imidazolate framework (ZIF) derived Co/Fe-N-C catalyst with small mesopores and high density of CoFe atomic active sites was prepared by regulating the Fe dosage and pyrolysis temperature. Molecular dynamics simulation and electrochemical tests showed that >2 nm mesopores had no significant influence on the diffusion process of O-2 and H2O molecules, resulting in high utilization of active sites and low mass transport resistance. The proton exchange membrane fuel cell (PEMFC) exhibited a high-power density of 755 mW cm(-2) with only 1.5 mg cm(-2) of non-Pt catalyst in the cathode, and no apparent performance loss was observed even at high current densities.
Article
Chemistry, Physical
Chenyang Zheng, Di Xiao, Junfeng Zhang, Yabiao Pei, Lianqin Wang, Xin Liu, Yan Yin, Michael D. Guiver, Xianguo Li
Summary: The relationship between molecular conformation of anion exchange ionomers (AEIs) and catalyst layer (CL) parameters in anion exchange membrane fuel cells (AEMFCs) under dynamic operating conditions was studied. The meta-AEI showed a lower swelling ratio compared to para-AEI, resulting in higher water retention ability and improved CL stability.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Qing Zhu, Yuanyuan Li, Qingling Qian, Peipei Zuo, Michael D. Guiver, Zhengjin Yang, Tongwen Xu
Summary: By using ultramicroporous membranes, the membrane selectivity can be improved, enhancing the efficiency of osmotic power generation and extending its application to other solutions such as industrial wastewater. Furthermore, the membranes can also extract energy from solutions with equimolar concentrations, creating a conceptually new energy extraction system.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
