Article
Chemistry, Multidisciplinary
Rui Guo, Zhiyuan Zha, Jixiao Wang, Zhi Wang, Michael D. Guiver, Song Zhao
Summary: The development of an aminal-linked covalent organic framework membrane with high water permeance and superior ion selectivity provides a new research avenue for designing smart/advanced membrane materials for angstrom-scale separation.
Article
Engineering, Chemical
Yasan He, Xiaogeng Lin
Summary: This study investigates the effect of the chemical composition of COFs on the formation of COF membranes and the separation performance, aiming to synthesize high-performance and compact COF films by introducing hydrogen bonding between COF crystallites. The prepared COF-TBDH/nylon membrane with -OH groups exhibited unprecedented performance with high permeation flux and rejection rate, demonstrating the important role of -OH groups in the COFs. This work provides a significant concept and strategy for the preparation of high-performance COF membranes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Chao Wu, Lei Xia, Shengji Xia, Bart van der Bruggen, Yan Zhao
Summary: Membrane technology has great potential in liquid waste treatment and resource recovery. However, the non-adjustable pore size of traditional membranes limits their selectivity for target ions. Covalent organic frameworks (COFs) have emerged as a promising candidate for advanced ion separation membranes due to their low density, large surface area, tunable channel structure, and tailored functionality. This review analyzes and summarizes the progress in understanding ion capture mechanisms, preparation processes, and applications of COF-based membranes, providing promising approaches for the design, preparation, and application of COF-based membranes in ion selectivity for recovery of ionic resources.
Article
Chemistry, Multidisciplinary
Fangmeng Sheng, Bin Wu, Xingya Li, Tingting Xu, Muhammad A. Shehzad, Xiuxia Wang, Liang Ge, Huanting Wang, Tongwen Xu
Summary: Research demonstrates that COF membranes with a channel size of approximately 1.4 nm exhibit efficient ion sieving properties, with high monovalent cation permeation rates and low multivalent cation permeabilities.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xinda You, Li Cao, Yawei Liu, Hong Wu, Runlai Li, Qianxiang Xiao, Jinqiu Yuan, Runnan Zhang, Chunyang Fan, Xiaoyao Wang, Pengfei Yang, Xiaoyu Yang, Yu Ma, Zhongyi Jiang
Summary: Ionic covalent organic framework membranes (iCOFMs) with charged framework nanochannels and high charge density have been developed to control ion transport. These membranes enable ion exclusion while maintaining high water permeability, and hold great potential for water purification, ionic separation, sensing, and energy conversion.
Article
Engineering, Environmental
Liang Ren, Jianxin Chen, Jian Han, Jinsheng Liang, Hong Wu
Summary: In this study, a custom-tailored nanochannels strategy was used to form two-dimensional covalent organic framework nanosheets (COFNs) with positively charged, narrowed, and lithiophilic channels. These nanosheets were easily assembled into defect-free and oriented covalent organic framework membranes (COFMs) via vacuum-assisted filtration method. The resulting COFMs exhibited excellent performance in ion separation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Anupam Das, Mousumi Hazarika, Balakondareddy Sana, Tushar Jana
Summary: The fabrication and design of proton conduction nanochannels within solid electrolyte materials is crucial for the development of efficient proton exchange membranes in fuel cells. In this study, a melamine-based Schiff base network type porous covalent organic framework (MCOF) was synthesized and impregnated with phosphoric acid (H3PO4) to create a stable membrane. Mixed matrix membranes (MMMs) were also fabricated using P@MCOF as nanofillers and [2,2'-(m-phenylene)-5,5'-benzimidazole] or m-PBI as the membrane forming polymer matrix. The resulting MMM-based PEM showed superior proton conductivity, excellent thermal and mechanical properties, improved acid holding efficiency, and enhanced chemical stability.
ACS APPLIED NANO MATERIALS
(2023)
Article
Multidisciplinary Sciences
Niaz Ali Khan, Runnan Zhang, Xiaoyao Wang, Li Cao, Chandra S. Azad, Chunyang Fan, Jinqiu Yuan, Mengying Long, Hong Wu, Mark A. Olson, Zhongyi Jiang
Summary: The authors propose a two-step phase switching strategy to assemble compact and highly crystalline COF membranes, decoupling the polymerization and crystallization process. The resulting COF membranes exhibit exceptional permeance, making them a promising method for the fabrication of advanced organic crystalline microporous membranes.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Environmental
Fangmeng Sheng, Yuan Xia, Zhang Zhao, Tingting Xu, Liang Ge, Xingya Li, Tongwen Xu
Summary: Acid recovery is of great interest due to the large amount of acid chemicals used in various industries, leading to the generation of acidic wastewater. A self-standing COF (TpTAPA) membrane with high stability in acid and base solutions is developed. The membrane exhibits excellent separation performance for H+ over other cations, and the decorated nanochannels show different effects on H+ transport and multivalent cation leakage. These findings provide insights for the design of efficient nanoporous membranes for acid recovery from complex feed systems.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Bohui Lyu, Mao Wang, Zhongyi Jiang, Jianwen Jiang
Summary: The study highlights the importance of membrane flexibility in predicting reliable ion conductivity in COF membranes, with the pore size rather than membrane-Cl- interaction being identified as the key factor governing conductivity trends. The predicted Cl- conductivities in different COF membranes showed good agreement with experimental data, providing valuable insight into the fundamental mechanism of ion conduction. This microscopic understanding might help in designing new COF membranes for optimal ion conduction.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Ya Lu, Zhi-Bei Zhou, Qiao-Yan Qi, Jin Yao, Xin Zhao
Summary: This article reports a new type of polyamide membranes fabricated from amide-linked covalent organic frameworks (COFs), which have well-ordered pore structures. These membranes exhibit high permeability and rejection rate to organic dyes, as well as excellent stability under harsh conditions. The comparison with other membranes highlights the advantages of polyamide COF membranes in terms of mechanical property, stability, and separation performance, making them a promising material for high-performance separation membranes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Jingyu Wu, Zhuo Wang, Shuaihua Zhang, Qian Yang, Zhi Li, Xiaohuan Zang, Xiaoxian Zhao, Ningzhao Shang, Nithima Khaorapapong, Xingtao Xu, Yusuke Yamauchi
Summary: An inorganic-organic nanoarchitectonics strategy is developed to synthesize the MXene/covalent organic framework (COF) heterostructure, which shows excellent adsorption capacity and superior performance for microextraction of trace organochlorine pesticides, providing a new approach for the microextraction of environmental pollutants.
Article
Engineering, Chemical
David Kitto, Jovan Kamcev
Summary: Ion-exchange membranes (IEMs) play a crucial role in electrochemical membrane-based technologies. The charge and water content of IEMs significantly affect their performance. Most IEMs currently have low charge densities, which limit their performance. Design strategies for next-generation IEMs with higher charge densities are proposed.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Review
Chemistry, Physical
Rui Wang, Jiaxing Guo, Jian Xue, Haihui Wang
Summary: Covalent organic frameworks (COFs) are a class of emerging organic porous crystalline materials composed entirely of organic linkers connected by strong covalent bonds. They have unique characteristics that perfectly meet the requirements for the fabrication of advanced separation membranes. Significant progress has been made in the preparation and application of COF membranes over the past few years, with discussions on the structure-performance relationship, intrinsic properties' effects, and fabrication methods.
Review
Chemistry, Multidisciplinary
Qing-Wei Meng, Di Wu, Sai Wang, Qi Sun
Summary: Insufficient access to clean water and resources is a pressing issue worldwide. Membrane-based ion separation, particularly using covalent organic framework (COF) membranes, has potential applications in desalination, acid recovery, and energy element extraction. This Review highlights the advantages of COF materials for membrane fabrication and discusses the fundamental principles of membrane design, as well as theoretical and practical challenges and potential opportunities in the targeted design of ion-selective membranes.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Pengtang Wang, Hao Yang, Yong Xu, Xiaoqing Huang, Juan Wang, Miao Zhong, Tao Cheng, Qi Shao
Summary: The synergistic effect between Cu core and ultrathin Pb shell in Cu/Pb core/shell nanocrystals significantly enhances the electrocatalytic reduction of CO2 toward C2+ liquid products, leading to higher Faradaic efficiency and selectivity. This study highlights the importance of synergistic effect in the design of efficient Cu-based catalysts for CO2 reduction.
Article
Nanoscience & Nanotechnology
Peiping Yu, Qintao Sun, Yue Liu, Bingyun Ma, Hao Yang, Miao Xie, Tao Cheng
Summary: The article introduces a fluorinated electrolyte-based lithium metal battery with excellent electrochemical performance. By conducting simulations, it is found that the electrolyte has a good ability to form a solid electrolyte interface (SEI) with a rich LiF layer and polymer layer. These findings provide guidance for the rational design of fluorine-rich electrolytes in the future.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Tianran Yan, Yu Wu, Fei Gong, Chen Cheng, Hao Yang, Jing Mao, Kehua Dai, Liang Cheng, Tao Cheng, Liang Zhang
Summary: This study utilizes sonication-assisted liquid-phase exfoliation to fabricate TiH2 nanodots as bifunctional electrocatalysts for lithium-sulfur batteries. The results show that TiH2 nanodots have a strong chemical affinity to polysulfides and can promote the precipitation and decomposition of Li2S, effectively suppressing shuttle effect and improving the redox kinetics of polysulfides.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Yue Liu, Qintao Sun, Peiping Yu, Bingyun Ma, Hao Yang, Jiayi Zhang, Miao Xie, Tao Cheng
Summary: Developing advanced electrolytes is crucial for stabilizing the lithium metal anode, with the concept of localized high-concentration electrolyte emerging as an efficient strategy. The underlying reaction mechanism of SEI formation in LHCEs with the Li anode is still unclear, but simulations have provided insights into the basic chemical mechanism of SEI formation.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Multidisciplinary Sciences
Juan Wang, Hao Yang, Fan Li, Leigang Li, Jianbo Wu, Shangheng Liu, Tao Cheng, Yong Xu, Qi Shao, Xiaoqing Huang
Summary: In this study, hollow Pt-doped RuO2 nanospheres with interstitial carbon were reported as highly active and stable electrocatalysts for overall water splitting. These catalysts exhibited superior performance compared to most reported catalysts and showed promising stability during continuous operation.
Article
Multidisciplinary Sciences
Pengtang Wang, Hao Yang, Cheng Tang, Yu Wu, Yao Zheng, Tao Cheng, Kenneth Davey, Xiaoqing Huang, Shi-Zhang Qiao
Summary: The authors demonstrate the efficient conversion of CO2 to ethanol using a silver-modified copper-oxide catalyst. By optimizing the coordination number and oxide state of the surface Cu sites, the catalyst accelerates and steers the reaction pathway for ethanol production.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Xuchun Wang, Mingyu Chu, Mengwen Wang, Qixuan Zhong, Jiatang Chen, Zhiqiang Wang, Muhan Cao, Hao Yang, Tao Cheng, Jinxing Chen, Tsun-Kong Sham, Qiao Zhang
Summary: By modulating the surface alloy structure of PdBi, the electronic structure of Pd can be continuously adjusted, leading to enhanced catalytic performance in the selective hydrogenation of propyne.
Article
Chemistry, Physical
Meng Wang, Qintao Sun, Zhenglong Fan, Wenxiang Zhu, Fan Liao, Jie Wu, Yunjie Zhou, Hao Yang, Hui Huang, Mengjie Ma, Tao Cheng, Qi Shao, Mingwang Shao, Zhenhui Kang
Summary: Rational tailoring of nanocatalysts with high efficiency is essential in catalysis research. Strain-engineering offers an effective approach to modulate the electronic structure of electrocatalysts. This study successfully obtained porous flexible iridium nanosheets with tunable compressive strain and established a definite correlation between reactivity and lattice strain.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Mengfan Li, Chenming Huang, Hao Yang, Yu Wang, Xiangcong Song, Tao Cheng, Jietao Jiang, Yangfan Lu, Maochang Liu, Quan Yuan, Zhizhen Ye, Zheng Hu, Hongwen Huang
Summary: We report a template-directed synthesis method to programmatically fabricate nanoscale high-entropy alloys (HEAs) with controllable compositions and structures by independently controlling the morphology and composition of HEA. A total of 12 nanoscale HEAs with controllable morphologies including zero-dimension nanoparticles, one-dimensional nanowires, two-dimensional ultrathin nanorings (UNRs), and three-dimensional nanodendrites were synthesized. The as-prepared HEA-PdPtCuPbBiUNRs/C showed superior electrocatalytic performance for ethanol oxidation reaction, outperforming commercial Pd/C and Pt/C catalysts in terms of mass activity and durability. This work provides a wide range of nanoscale HEAs and a versatile synthetic strategy with potential impacts in catalysis, sensing, biomedicine, and beyond.
Article
Multidisciplinary Sciences
Wenxiang Zhu, Xiangcong Song, Fan Liao, Hui Huang, Qi Shao, Kun Feng, Yunjie Zhou, Mengjie Ma, Jie Wu, Hao Yang, Haiwei Yang, Meng Wang, Jie Shi, Jun Zhong, Tao Cheng, Mingwang Shao, Yang Liu, Zhenhui Kang
Summary: The stability and activity of two-dimensional ruthenium-iridium oxide in acidic oxygen evolution reactions are enhanced. The Ru0.5Ir0.5O2 catalyst exhibits good activity and stability under acidic conditions, forming more high oxidation state Ru active sites.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Yunjie Zhou, Liang Xu, Jie Wu, Wenxiang Zhu, Tiwei He, Hao Yang, Hui Huang, Tao Cheng, Yang Liu, Zhenhui Kang
Summary: We demonstrate an ideal ZnO@ZnO2 electrocatalyst for efficient oxygen reduction to hydrogen peroxide in a neutral medium. The in situ growth of ZnO2 on ZnO forms heterogeneous interfaces, weakening the binding energies of OOH* and O*. In a 0.1 M K2SO4 electrolyte, ZnO@ZnO2 exhibits nearly 100.0% selectivity for H2O2 production and a production rate of 5.47 mol g(cat)(-1) h(-1) at 0.1 V vs. RHE, with a Faraday efficiency of approximately 95.5%.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Multidisciplinary Sciences
Kai Liu, Hao Yang, Yilan Jiang, Zhaojun Liu, Shumeng Zhang, Zhixue Zhang, Zhun Qiao, Yiming Lu, Tao Cheng, Osamu Terasaki, Qing Zhang, Chuanbo Gao
Summary: This study reports a method for synthesizing metastable hexagonal Pt nanostructures on 3d transition metal nanocrystals without involving galvanic replacement reaction, expanding the frontier of phase-replication synthesis. Compared to noble metal substrates, the 3d transition metal substrate has more crystal phases and lower cost, providing the hexagonal Pt skin with compressive strains and programmable charge density, making it particularly suitable for the alkaline hydrogen evolution reaction. The energy barriers are greatly reduced, resulting in high activity for hydrogen evolution. This strategy paves the way for tailored electronic properties of metastable noble metal catalysts for efficient and cost-effective energy conversion.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yiming Lu, Qintao Sun, Yue Liu, Peiping Yu, Yanyan Zhang, Jiachen Lu, Haochen Huang, Hao Yang, Tao Cheng
Summary: Due to their potential use in portable applications such as electric vehicles, lithium-metal batteries (LMBs) have attracted attention for their low electrochemical potential and high theoretical specific energy. However, the uncontrolled growth of lithium dendrites during cycling has been a challenge. Recently, the concept of using localized high-concentration electrolytes (LHCEs), achieved by diluting high concentration electrolytes with inert solvents, has shown promise in enabling dendrite-free cycling of LMBs. In this study, the reactions of lithium bis(fluorosulfonyl)imide (LiFSI) in a mixture of dimethoxyethane (DME)/tris(2,2,2-trifluoroethyl) orthoformate (TFEO) electrolyte at a lithium metal anode were investigated. The formation mechanism of the solid electrolyte interface (SEI) was studied using a hybrid ab initio and reactive force field (HAIR) method. The results revealed important initial reduction reactions of LiFSI, TFEO, and DME, leading to the formation of a LiF-rich SEI inorganic inner layer (IIL) and unsaturated carbon products from TFEO. These findings can provide valuable insights for the future design of improved electrolytes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
