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
Chemistry, Multidisciplinary
Daria Kurandina, Banruo Huang, Wentao Xu, Nikita Hanikel, Andrea Daru, Gautam D. Stroscio, Kaiyu Wang, Laura Gagliardi, F. Dean Toste, Omar M. Yaghi
Summary: In this study, a nitrone-linked covalent organic framework, COF-115, was synthesized by polycondensation reaction of N, N', N'', N'''-(ethene-1,1,2,2-tetrayltetrakis(benzene-4,1-diyl))tetrakis(hydroxylamine) and terephthaladehyde. The formation of nitrone functionality was confirmed through spectroscopic analysis. The porous nature of COF-115 was evaluated through sorption experiments and showed potential for water harvesting and CO2 capture applications. Additionally, the photoinduced rearrangement of COF-115 to an associated amide-linked material was successfully demonstrated.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Nanoscience & Nanotechnology
Jinlei Yang, Bin Tu, Guangjie Zhang, Pengchao Liu, Kui Hu, Jiarong Wang, Zhuang Yan, Zhiwei Huang, Munan Fang, Junjun Hou, Qiaojun Fang, Xiaohui Qiu, Lianshan Li, Zhiyong Tang
Summary: Osmotic power, or 'blue energy', is a vast and sustainable energy source produced by mixing solutions of different salt concentrations. This study demonstrates the potential application of covalent organic framework monolayer membranes with well-ordered pore arrangement in osmotic power generation, achieving low membrane resistance and high ion conductivity.
NATURE NANOTECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Mengchu Feng, Ziru Niu, Chunyan Xing, Yehao Jin, Xiao Feng, Yuanyuan Zhang, Bo Wang
Summary: Porous microcapsules with selective mass transfer and mechanical robustness for enzyme encapsulation were fabricated using covalent organic framework (COF) spheres. The COF microcapsules provided an enclosed aqueous environment for enzymes, with size-selective porous shells that allowed for fast diffusion of substrates and products. The crosslinking of COF spheres enhanced the structural stability of the capsules and imparted enrichment effects. The enzymes encapsulated in the COF microcapsules showed enhanced activity and durability in organic media.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Environmental Sciences
Yan Huang, Xiaoqian Hao, Shuanglong Ma, Rui Wang, Yazhou Wang
Summary: This review comprehensively discusses the recent progress of covalent organic frameworks (COFs) in gas purification, especially in the capture, catalysis, and detection of common harmful gases. The design strategies of COF functional materials and the challenges and future research directions in this field are also summarized.
Article
Chemistry, Physical
Kaixiang Chen, Jinyong Xiong, Hao Yu, Li Wang, Yonghai Song
Summary: Nitrogen-doped porous carbon (NC) capped nano-Si particles (Si@NC) composites with core-shell structure were obtained by calcination of covalent organic frameworks (COFs) encapsulated nano-Si. The well-ordered NC framework shell derived from COFs exhibited high elasticity, well-ordered pores, and provided space for the volume expansion of nano-Si, making it an excellent candidate as an anode material for LIBs.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Ming Qian, Xi Yan, Yan Chen, Xiao-Jing Guo, Wan-Zhong Lang
Summary: In this study, electrospun membranes were used as substrates to prepare covalent organic frameworks (COFs) composite membranes with graphene oxide and oxidized carbon nanotubes (GO-OCNTs) as an intermediate layer. The addition of the intermediate layer improved the water permeability and dye retention rate of the composite COF membrane, and exhibited excellent chemical and mechanical stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Peng-Ju Tian, Xiang-Hao Han, Qiao-Yan Qi, Xin Zhao
Summary: Azulene is incorporated into a covalent organic framework (COF) to provide broad-spectrum light absorption and interlayer dipole interactions. The resulting crystalline porous COF exhibits high photothermal conversion efficiency, making it an efficient material for solar energy utilization, water evaporation processes, and light responsive applications.
Article
Chemistry, Multidisciplinary
Jian Zheng, Mohammad Wahiduzzaman, Dushyant Barpaga, Benjamin A. Trump, Oliver Y. Gutierrez, Praveen Thallapally, Shengqian Ma, B. Peter McGrail, Guillaume Maurin, Radha Kishan Motkuri
Summary: The study explores the use of porous covalent organic polymers for fluorocarbon adsorption cooling applications, demonstrating high R134a adsorption capacities and unique isotherms for COP-2 and COP-3. Molecular simulations showed the crucial role of mesoporous defects in the unusual adsorption behavior, with a direct correlation between higher fluorocarbon adsorption capacities and increasing pore volumes induced by defects. These defect-containing porous COPs show promise for adsorption-based cooling applications due to their high porosities, excellent reversibility, fast kinetics, and large operating windows.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Biophysics
Wendao Xu, Song Wang, Wei Li, Ziyang Zhang, Yingli Wang, Yuhao Yang, Haoran Zhang, Pingwei Liu, Lijuan Xie, Yibin Ying
Summary: The development of rapid molecular detection technologies is crucial for urban agriculture, medicine, and environmental protection. Researchers have introduced a reticular material called two-dimensional covalent organic frameworks (COFs) to improve the performance of terahertz (THz) absorbers for pesticide detection. The COF film, which can be directly deposited on the dielectric layer of THz absorbers, exhibits hierarchical structures and precise nanopores, resulting in a highly sensitive and selective response.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Egbert Zojer
Summary: Decorating pore walls of covalent organic frameworks (COFs) with assemblies of polar entities can tune the electronic properties of the inner surfaces. This modification changes the electrostatic energy within the pores, affecting charge separation, redox reactions, and catalysis in COF heterojunctions.
Article
Chemistry, Applied
Run Chen, Tianliang Hu, Yongqiang Li
Summary: TAPB-BPDA COF is a highly efficient iodine adsorbent with permanent porous structure and excellent adsorption performance, capable of effectively adsorbing iodine from aqueous solution. The adsorption process follows the pseudo-second-order kinetic model and Langmuir model, and is achieved through weak interaction between the benzene ring and iodine.
REACTIVE & FUNCTIONAL POLYMERS
(2021)
Article
Chemistry, Applied
Jichao Liu, Guoliang Li, Yanxin Yu, Xuxia Zhou
Summary: In this study, a hierarchically porous covalent organic framework foam (TbBd-foam) was fabricated using a simple gas-foaming technique to adsorb and remove two typical TPM dyes from aqueous solution. The foam showed efficient adsorption capacities for removing malachite green (MG) and crystal violet (CV) within 30 minutes, with high maximum adsorption capacities. Additionally, TbBd-foam could be easily recycled by treatment with an ethanol solution containing HCl (0.1%), making it a potential adsorbent for contaminated water remediation.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Ran Bu, Lin Zhang, Xiao-Yan Liu, Shuai-Liang Yang, Gen Li, En-Qing Gao
Summary: The recently emerging vinylene-linked covalent organic frameworks (VCOFs) show exceptional chemical stability and favorable light-emitting properties, promising sensing applications in acidic/basic conditions. Functionalized VCOFs exhibit reversible color and fluorescent response to acids/pH, with potential for developing highly robust sensory COFs.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Chemistry, Multidisciplinary
Suvendu Karak, Kaushik Dey, Rahul Banerjee
Summary: The morphology of COFs plays a crucial role in their applications. Understanding and optimizing the morphology of COFs can enhance their performance and achieve better engineering, thereby achieving better results in various application areas.
ADVANCED MATERIALS
(2022)
Article
Engineering, Chemical
Ahmed Fuwad, Hyunil Ryu, Jun-Hee Lee, Daejoong Kim, Yeong-Eun Yoo, Young-Rok Kim, Sun Min Kim, Tae-Joon Jeon
Article
Environmental Sciences
Young-Ryun Kim, Moonjin Lee, Jung-Yeul Jung, Tae-Won Kim, Daejoong Kim
MARINE POLLUTION BULLETIN
(2019)
Article
Energy & Fuels
Ferlin Robinson, Majid Shahbabaei, Daejoong Kim
Article
Chemistry, Multidisciplinary
Seung-Young Choi, Prem P. Sharma, Syed Abdullah Shah, Rahul Singh, Daejoong Kim, Kyeong-Sik Jin
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Chemistry, Physical
Ferlin Robinson, Chulwoo Park, Minsun Kim, Daejoong Kim
Summary: This study investigates the effect of deformation induced by different defects along the length of carbon nanotube on water transport. The presence of defects hinders the smooth and nearly frictionless flow of water inside the nanotube. Local deformation induced by the defects near the entrance and exit of the nanotubes has a preeminent effect on the movement of water molecules through the nanotube.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Majid Shahbabaei, Daejoong Kim
Summary: This study investigates the gas hydrates, storage, and transport properties of methane (CH4) and carbon dioxide (CO2) across carbon nanotubes (CNTs) designed by different functional groups through molecular dynamics simulations. The goal is to discuss the gas hydrate formation mechanism in the membrane technology framework and propose a promising approach to address the drawbacks in traditional hydrate technologies. The model membranes show high CH4 storage capacity and varying hydrate cage numbers based on the mole fraction, suggesting better performance for certain functional groups.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Applied
Majid Shahbabaei, Daejoong Kim
Summary: Membrane science and technology have been highly regarded for industrial applications due to advances in nanosize pores and channels within membranes. The use of computer simulations and molecular dynamics simulations provides a fundamental understanding of membrane characterization and gas separation mechanisms. These advancements aim to enhance the understanding of gas permeation and separation across nanopores, attracting attention from both industry and academia.
SEPARATION AND PURIFICATION REVIEWS
(2022)
Article
Multidisciplinary Sciences
Rahul Singh, Seok Hoon Hong, Daejoong Kim
Summary: Reverse electrodialysis (RED) is an effective method for generating electricity by mixing different salt concentrations in water using cation-exchange membranes (CEM) and anion-exchange membranes (AEM). In this study, a procedure for fabricating a RED device using laboratory-scale CEM and AEM for power production is demonstrated. The article also includes the explanation of measurement conditions, net power output calculation, fundamental parameters, and theoretical parameters affecting overall cell performance.
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS
(2021)
Article
Chemistry, Physical
Rahul Singh, Daejoong Kim
Summary: The study prepared a highly ordered, stable, and hierarchically porous covalent organic membrane (COM) with potential applications in reverse electrodialysis. Besides having a stable structure and chemical stability, COM also offers better ion selectivity and enhanced ion transport at high temperatures.
Article
Biochemistry & Molecular Biology
Prem P. Sharma, Rahul Singh, Syed Abdullah Shah, Cheol Hun Yoo, Albert S. Lee, Daejoong Kim, Jeong-Geol Na, Jong Suk Lee
Summary: In this study, a nano-composite material for reverse electrodialysis (RED) was reported, which improved ion conduction by rearranging the polymer structure, resulting in enhanced efficiency of the nanomembrane.
Article
Energy & Fuels
Syed Abdullah Shah, Zeeshan Haider, Majid Shahbabaei, Daejoong Kim
Summary: This study investigates the effect of electrolyte composition on the performance of reverse electrodialysis, revealing the mechanism of competitive cation adsorption into the membrane through experimental and molecular dynamics simulation approaches.
Article
Chemistry, Physical
Syed Abdullah Shah, Seung-Young Choi, Sungmin Cho, Majid Shahbabaei, Rahul Singh, Daejoong Kim
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Chemistry, Physical
Majid Shahbabaei, Daejoong Kim
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Meeting Abstract
Biophysics
Hyunki Kim, Moon-ki Choi, Byungho Lee, Soojin Jo, Daejoong Kim, Moon Ki Kim
BIOPHYSICAL JOURNAL
(2018)