Article
Chemistry, Multidisciplinary
Yuhe Cao, Zhongyun Liu, Wulin Qiu, William J. Koros
Summary: Carbon molecular sieve (CMS) membranes possess attractive properties for challenging gas separations and the Pseudo Wheel+Hub & Spoke asymmetric structure offers new possibilities for maintaining these properties. The CMS membrane with this structure provides both selective layer support and low flow resistance, surpassing rigid glassy polymers. By combining precursor asymmetric hollow fiber formation and optimized pyrolysis, a defect-free CMS proof-of-concept membrane is created. The resulting composite CMS membrane demonstrates appealing CO2/CH4 selectivity and permeance at 35 degrees C.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Hae Sol Lee, Nam Sun Kim, Dong-il Kwon, Su-Kyung Lee, Muhammad Numan, Taesung Jung, Kanghee Cho, Michal Mazur, Hae Sung Cho, Changbum Jo
Summary: Organic functionalization of zeolites can adjust their effective pore diameters, allowing for challenging separations. Post-functionalized zeolites demonstrate ideal selectivity in separating light olefins and paraffins.
ADVANCED MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Yasuyuki Yamane, Minoru T. Miyahara, Hideki Tanaka
Summary: High-performance carbon molecular sieves (CMSs) for propylene and propane separation were synthesized by chemical vapor deposition. Control of carbon deposition and pore entrance size led to high adsorption rate and selectivity for C3H6 over C3H8.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Wulin Qiu, Johannes E. Leisen, Zhongyun Liu, Wenying Quan, William J. Koros
Summary: Carbon molecular sieve (CMS) membranes have impressive separation properties, and this study characterizes CMS with the simplest polyimide (PI) PMDA/pPDA to better understand the chemical and morphology structures. Comparisons were made with a CMS derived from a more conventional PI precursor, revealing the presence of various components in both types of CMS. The morphologies of CMS show similarities consistent with distributed molecular sieving plate-like structures, aiding in understanding the diverse CMS membrane separation performance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Applied
Megha Sharma, Mark A. Snyder
Summary: This study presents a facile and scalable synthesis method for carbon microspheres with a unique hierarchically structured flower-like morphology. These carbons exhibit high CO2 capacity, attractive CO2/N-2 selectivity, and ease of regeneration. Detailed analysis reveals that the CO2 capacity is strongly correlated with the volume of ultra-micropores, rather than surface area or total pore volume. These materials show promise as efficient and cost-effective CO2 sorbents due to their hierarchical structure, low isosteric heats of adsorption, and easy temperature and pressure-swing-based cyclic regeneration.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Feng Zhang, Yang Si, Jianyong Yu, Bin Ding
Summary: This article introduces a new type of biomimetic sub-nanoporous engineered aerogel molecular sieves, which achieve efficient and reversible molecular separation through coupling size-thermodynamic gated functions, demonstrating potential widespread applications in chemical, energy, and environmental processes.
Article
Energy & Fuels
B. Sasikumar, Yohannan Subin Sabilon, G. Arthanareeswaran
Summary: The development of hybrid membrane materials with excellent gas separation performance has been a global focus. In this study, ZIF-8 and CMS nanoparticles were successfully synthesized and incorporated into PAI membranes. The resulting hybrid membranes showed improved mechanical stability and separation performance.
Article
Chemistry, Physical
Orlando F. Cruz Jr, Ignacio Campello Gomez, Manuel Martinez Escandell, Carlos R. Rambo, Joaquin Silvestre-Albero
Summary: Activated carbon-based molecular sieves show excellent performance in separation processes of CO2/CH4 mixtures, indicating potential industrial applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Chemical
Stefan Chisca, N. M. Srivatsa Bettahalli, Valentina Elena Musteata, Serhii Vasylevskyi, Mohamed Nejib Hedhili, Edy Abou-Hamad, Madhavan Karunakaran, Giuseppe Genduso, Suzana P. Nunes
Summary: Hydroxyl-functionalized polytriazole can be used as a precursor for highly crosslinked membranes and carbon molecular sieves for gas separation. Increasing the treatment temperature results in higher CO2 permeability while maintaining CO2/CH4 selectivity.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Environmental Sciences
D. Praveen Kumar, D. Ramesh, V. Karuppasamy Vikraman, P. Subramanian
Summary: Adsorption is a promising technology in the gas separation and purification process, with activated carbon and zeolites being the most commonly used adsorbents. Research on synthesizing low-cost and effective adsorbents has gained attention, with Carbon Molecular Sieves (CMSs) considered as an attractive alternative.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Shichao Sun, Zheng Wang, Chen Su, Feifei Pan, Weiyu Cao
Summary: This study presents an in situ electrothermal approach for graphitizing carbon fibers (CFs), which increases their strength and Young's moduli by manipulating the growth of graphite microcrystalline structures. The positive effect of the electric field on microcrystalline growth was revealed using molecular dynamics and density functional theory calculations.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
Daniil M. Polyukhov, Artem S. Poryvaev, Aleksandr S. Sukhikh, Sergey A. Gromilov, Matvey Fedin
Summary: MOFs are promising for separating structurally similar components, with fine-tuning of the structure leading to higher efficiency. This study demonstrates that subtle metal- and temperature-induced changes in window dimensions of MOFs can efficiently separate xylene isomers, showing potential for target liquid-state separations.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Ruisong Xu, Mengjie Hou, Yue Wang, Lin Li, Zonglin Pan, Chengwen Song, Tonghua Wang
Summary: The carbon molecular sieve (CMS) membranes derived from a novel precursor polymer of phenolphthalein-based poly(arylene ether ketone) (PEK-C) exhibit high C2H4 permeability and superior C2H4/C2H6 selectivity, showing great potential for industrial applications of C2H4/C2H6 separation.
Review
Chemistry, Physical
D. Torres, S. Perez-Rodriguez, L. Cesari, C. Castel, E. Favre, V. Fierro, A. Celzard
Summary: Membrane processes are competitive in gas separation, while resin-derived carbon membranes have improved performance and are applied in processes such as hydrogen purification, air separation, natural gas/biogas sweetening, or carbon dioxide capture.
Article
Engineering, Chemical
Li Yin, Dongfeng Li, Hongxia Guo, Shuai Wang, Tiexin Zhang, Yunling Liu, Fangyuan Gai, Xiaogang Zhao
Summary: Incorporating functional materials into polymer precursors and preparing hybrid carbon molecular sieve membranes through carbonization process is an effective way to solve the trade-off problem between permeability and selectivity in gas separation.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Instruments & Instrumentation
Shogo Kawaguchi, Michitaka Takemoto, Hideki Tanaka, Shotaro Hiraide, Kunihisa Sugimoto, Yoshiki Kubota
JOURNAL OF SYNCHROTRON RADIATION
(2020)
Article
Multidisciplinary Sciences
Sanjeev Kumar Ujjain, Abhishek Bagusetty, Yuki Matsuda, Hideki Tanaka, Preety Ahuja, Carla de Tomas, Motomu Sakai, Fernando Vallejos-Burgos, Ryusuke Futamura, Irene Suarez-Martinez, Masahiko Matsukata, Akio Kodama, Giovanni Garberoglio, Yury Gogotsi, J. Karl Johnson, Katsumi Kaneko
Summary: Isotope separation of heavier gases is crucial for biomedical applications, but current methods are energy-intensive and time-consuming. A new cryogenic adsorption-based technology utilizing nanoporous materials and collective nuclear quantum effects shows promise for rapid and efficient oxygen and methane isotope separation.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Eugenio Hernan Otal, Hideki Tanaka, Manuela Leticia Kim, Juan Paulo Hinestroza, Mutsumi Kimura
Summary: This study developed a sensor for water quality assessment based on lanthanide-based metal-organic frameworks and cotton, providing strong emission and high sensitivity. The modified cotton was characterized through various techniques to understand the attachment of Tb-BTC to cotton, leading to the development of a fluoride demonstrator sensor suitable for water analysis under international regulations.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Shotaro Hiraide, Homare Arima, Hideki Tanaka, Minoru T. Miyahara
Summary: This study discussed the influence of polymer binders on the adsorption behavior of flexible MOFs, revealing the phenomenon of gate adsorption slacking and analyzing its thermodynamic characteristics through molecular simulations. The results showed that controlling the external force applied to MOF particles is crucial for shaping pellets that meet the requirements of gate adsorption.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Hae Sung Cho, Hideki Tanaka, Yongjin Lee, Yue-Biao Zhang, Juncong Jiang, Minho Kim, Hyungjun Kim, Jeung Ku Kang, Osamu Terasaki
Summary: The study demonstrates the influence of intermolecular interaction among adsorbates and substrate, controlled by pore environment and species of adsorbates, on adsorption behavior. MOF-205 exhibits unique CO2 adsorption behavior due to its distinct pore geometry. Comparison of materials with different pore environments reveals that the relative strength of adsorbate-adsorbate and adsorbate-substrate interaction leads to different shapes of isotherms.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Radovan Kukobat, Motomu Sakai, Ayumi Furuse, Hayato Otsuka, Hideki Tanaka, Takuya Hayashi, Masahiko Matsukata, Katsumi Kaneko
Summary: This study reports a graphene-wrapped hydroxyapatite membrane for efficient separation of H-2 from CH4 and light hydrocarbons. The pores are prepared by wrapping HAP crystals with graphene, forming 1D channels at the graphene-HAP interface. The G-HAP membrane shows high permeance and selectivity, and molecular dynamics simulations suggest that the channels derived from surface grooves play a crucial role in gas separation. The proposed graphene-wrapping approach holds promise for the development of efficient H-2 separation membranes.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Nanoscience & Nanotechnology
Yasuyuki Yamane, Minoru T. Miyahara, Hideki Tanaka
Summary: High-performance carbon molecular sieves (CMSs) for propylene and propane separation were synthesized by chemical vapor deposition. Control of carbon deposition and pore entrance size led to high adsorption rate and selectivity for C3H6 over C3H8.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Inorganic & Nuclear
Ryota Saito, Hideki Tanaka, Katsuya Teshima, Daisuke Takimoto, Sho Hideshima, Wataru Sugimoto
Summary: Birnessite manganese oxide is a promising candidate for aqueous supercapacitors due to its pseudocapacitance. By doping with iridium, the electronic conductivity and charge storage capability of birnessite can be improved.
INORGANIC CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Radovan Kukobat, Motomu Sakai, Hideki Tanaka, Hayato Otsuka, Fernando Vallejos-Burgos, Christian Lastoskie, Masahiko Matsukata, Yukichi Sasaki, Kaname Yoshida, Takuya Hayashi, Katsumi Kaneko
Summary: In this study, a graphene-wrapped MFI molecular-sieving membrane was prepared for the ultrafast separation of hydrogen from methane. The membrane exhibited excellent separation performance, with a permeability of 5.8 x 10(6) barrers, a single gas selectivity of 245, and a mixed gas selectivity of 50. Molecular dynamic simulations revealed that efficient molecular sieving was achieved due to the subnanoscale interfacial space between graphene and zeolite crystal faces. The hierarchical pore structure of the membrane enabled rapid permeability, offering a promising route for the energy-efficient industrial gas separation of hydrogen/methane and carbon dioxide/methane.
Article
Multidisciplinary Sciences
Tomohito Sudare, Takuro Yamaguchi, Mizuki Ueda, Hiromasa Shiiba, Hideki Tanaka, Mongkol Tipplook, Fumitaka Hayashi, Katsuya Teshima
Summary: This study demonstrates that the structure of water is sensitive to the configuration of ions in the nanoconfinement and governs ion storage in layered materials. The researchers found that decreasing the filling density effectively facilitates the 2D hydrogen-bond networking structure in water around interlayer ions, resulting in a high storage capacity.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Tomohito Sudare, Katsuya Teshima, Kenta Kawaguchi, Kazuse Yamaguchi, Kazuki Hirono, Mongkol Tipplook, Hideki Tanaka, Fumitaka Hayashi
Summary: Unique atomic arrangements in nonthermodynamic solid solutions can introduce new functionalities in different materials. In this study, a low-temperature topochemical reaction was used to extend the solid-solubility limit in layered double hydroxides (LDHs) and achieve a significantly higher selectivity for fluoride ions.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Tomohito Sudare, Mizuki Ueda, Takuro Yamaguchi, Mongkol Tipplook, Hideki Tanaka, Fumitaka Hayashi, Katsuya Teshima
Summary: In layered materials, the stacking sequence can affect ion transport and storage properties. However, the relationship between the stacking sequence and anion transport and storage properties is not well understood. In this study, we found that the stacking sequence influences the nitrate-storage properties of layered double hydroxides. The 2H1 polytype has a higher nitrate-storage capacity compared to the 3R1 polytype. The difference in nitrate-storage capacity is attributed to the soft nature of the 2H1 polytype, which allows minimal lattice changes, while the rigid lattice of the 3R1 sequence requires a larger lattice expansion, hindering ion storage.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Hae Sung Cho, Hideki Tanaka, Keiichi Miyasaka, Osamu Terasaki
Summary: Adsorption has been studied for both improving gas storage capacity and understanding the pre-stage of reactions. X-ray diffraction (XRD) combined with gas adsorption (in situ gas adsorption XRD) can directly observe the structural information during gas adsorption, revealing phenomena that conventional isotherms cannot directly observe. This technique has also been used to determine the pore structures of porous crystals and study the influence of pore environments on adsorption behavior.
ACCOUNTS OF MATERIALS RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Fumitaka Hayashi, Kenta Furui, Nanako Tatewaki, Tomohito Sudare, Maru Kashiwazaki, Hiromasa Shiiba, Hideki Tanaka, Michihisa Koyama, Chiaki Terashima, Katsuya Teshima
Summary: Liquid exfoliation is a scalable and effective technique for preparing 2D materials. In this study, millimeter-sized K2Ti2O5 (KTO) single crystals were grown and then exfoliated to form nanosheet colloids in water. The best solvent for exfoliation was found to be H2O, and XANES measurements provided evidence of hydrolysis of KTO crystals in water, which accelerated the exfoliation process.
Article
Chemistry, Physical
Atsushi Gabe, Mohammed Ouzzine, Erin E. Taylor, Nicholas P. Stadie, Naoki Uchiyama, Tomomi Kanai, Yuta Nishina, Hideki Tanaka, Zheng-Ze Pan, Takashi Kyotani, Hirotomo Nishihara
Summary: High-density graphene-based pellets with anomalous gas densification property were fabricated using ZTC and rGO, forming a unique structure connected by double-sided graphene fragments. The pellets exhibit high volumetric H-2 storage at room temperature due to the high density packing of graphene nanofragments and exceptional mechanical toughness.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Physical
Jie Sheng, Jingshan He, Dun Ma, Yuanbo Wang, Wu Shao, Tian Ding, Ronghao Cen, Jingwen He, Zhihao Deng, Wenjun Wu
Summary: This study presents an innovative approach to improve the photovoltaic conversion characteristics and stability of perovskite solar cells through carbon electrode interface modification. By in-situ polymerization and carbonization on the surface of nano-graphite, a dendritic structure carbon electrode is formed, reducing the work function and aligning the energy levels with perovskite. This leads to improved charge and hole collection efficiency, resulting in increased photovoltaic conversion efficiency. Furthermore, the modified carbon electrode-based perovskite solar cells exhibit exceptional stability, maintaining high efficiency even without encapsulation.
Article
Chemistry, Physical
Guodong Shi, Jian Song, Xiaoxiao Tian, Tongtong Liu, Zhanjun Wu
Summary: This study demonstrates the improvement of mechanical properties and reduction of coefficient of thermal expansion (CTE) in graphene oxide (GO)/epoxy (EP) nanocomposites by enhancing the interface between GO and EP through functionalization and incorporating rigid-flexible interphases. The results reveal that the SiO2-PEA-GO hybrid exhibits better strengthening and toughening effects, as well as lower CTE, compared to the PEA-GO hybrid due to the presence of rigid-flexible interfaces with higher bonding strength and better energy dissipation mechanisms. Additionally, the nanocomposites with longer polyetheramine (PEA) molecules in the rigid-flexible interphases demonstrate higher strength and toughness, while maintaining a lower CTE. This work provides a promising strategy for constructing adjustable flexible-rigid interfacial structures and offers potential in developing GO/EP nanocomposites with high mechanical properties and low CTE.
Article
Chemistry, Physical
Rafal Janus, Sebastian Jarczewski, Jacek Jagiello, Piotr Natkanski, Mariusz Wadrzyk, Marek Lewandowski, Marek Michalik, Piotr Kustrowski
Summary: In this study, a facile procedure for the synthesis of CMK-1 and CMK-2 carbon replicas was developed. The method utilizes basic laboratory equipment and a renewable carbon source, and operates under mild conditions. The resulting carbon mesostructures exhibit exquisite replication fidelity and structural homogeneity, making them suitable for applications in various fields.
Article
Chemistry, Physical
Anqi Wang, Connor J. MacRobbie, Alex Baranovsky, Jean-Pierre Hickey, John Z. Wen
Summary: In this study, a novel polymer-free nanothermite aerogel with a wide range of nanoparticle loading was fabricated via a new additive manufacturing process. The SEM images showed a unique porous structure formed by extra thin rGO sheets, wrapping individual nanothermite clusters. The DSC-TGA results and high-speed combustion videos confirmed the enhanced energetic performance of the printed specimen.
Article
Chemistry, Physical
Wanze Wu, Misheng Zhao, Shiwei Miao, Xiaoyan Li, Yongzhong Wu, Xiao Gong, Hangxiang Wang
Summary: Superhydrophobic solar-driven interfacial evaporator is an energy-efficient technology for seawater desalination, which is easily fabricated using robust photothermal superhydrophobic coating and substrate. The created bifunctional coating on the melamine sponge substrate shows stable and highly efficient photothermal and superhydrophobic performance for seawater desalination. This superhydrophobic solar-driven interfacial evaporator is expected to have wide applications in seawater desalination.
Article
Chemistry, Physical
Zichen Xiang, Zhi Song, Tiansheng Wang, Menghang Feng, Yijing Zhao, Qitu Zhang, Yi Hou, Lixi Wang
Summary: This study presents a co-electrospinning synthesis strategy to fabricate lightweight and porous Co@C composite nanofibres with wideband microwave attenuation capacity. The addition of MOF-derived Co additives enhances the low-frequency absorption performance.
Article
Chemistry, Physical
J. Snow, C. Olson, E. Torres, K. Shirley, E. Cazalas
Summary: This study investigates the use of a perovskite-based graphene field effect transistor (P-GFET) device for X-ray detection. The sensitivity and responsivity of the device were found to be influenced by factors such as X-ray tube voltage, current, and source-drain voltage. Simulation experiments were conducted to determine the dose rate and energy incident on the device during irradiation.
Article
Chemistry, Physical
Zuzana Jankovska, Lenka Matejova, Jonas Tokarsky, Pavlina Peikertova, Milan Dopita, Karolina Gorzolkova, Dominika Habermannova, Michal Vastyl, Jakub Belik
Summary: This study provides new insights into microwave-assisted pyrolysis of scrap tyres, demonstrating that it can produce microporous carbon black with potential application in xylene adsorption. Compared to conventional pyrolysis, microwave pyrolysis requires less time and energy while maintaining similar adsorption capacity.
Article
Chemistry, Physical
Max Bommert, Bruno Schuler, Carlo A. Pignedoli, Roland Widmer, Oliver Groning
Summary: A detailed understanding of the interaction between molecules and two-dimensional materials is crucial for incorporating functional molecular films into next-generation 2D material-organic hybrid devices. This study compares the energy level alignment of different-sized fullerenes on a Moire superstructure and finds that C-84 fullerenes can be either neutral or negatively charged depending on slight variations of the electrostatic potential. This discovery suggests a new path to achieve ambipolar charge transfer without overcoming the electronic gap of fullerenes.
Article
Chemistry, Physical
Yuanjing Cheng, Xianxian Sun, Ye Yuan, Shuang Yang, Yuanhao Ning, Dan Wang, Weilong Yin, Yibin Li
Summary: The dual-structure aerogel (GS) consisting of flexible silica fibers and graphene honeycomb structures exhibits excellent resilience, flexibility, and reliability. It also shows remarkable wave absorbing performance, making it an ideal candidate for microwave absorption applications such as flexible electronics and aerospace.
Article
Chemistry, Physical
Shuyu Fan, Yinong Chen, Shu Xiao, Kejun Shi, Xinyu Meng, Songsheng Lin, Fenghua Su, Yifan Su, Paul K. Chu
Summary: Graphene coatings are promising solid lubrication materials due to their mechanical properties. This study presents a new method for in situ deposition of high-quality graphene coatings on hard substrates using NiCo solid solution and competitive reaction strategies. The graphene coating deposited on substrates with deep NiCo solid solution demonstrates superior low-friction and durability.
Article
Chemistry, Physical
Mengdi Wang, Sanyin Qu, Yanling Chen, Qin Yao, Lidong Chen
Summary: The improved thermoelectric properties of conducting polymers are achieved by selectively capturing single-walled carbon nanotubes (SWNTs) in a conducting polymer film, leading to increased carrier mobility and reduced thermal conductivity. The resulting composite film exhibits significantly higher electrical conductivity and lower thermal conductivity compared to films with a mixture of SWNTs. This work provides a convenient and efficient method to enhance the thermoelectric properties of conducting polymers.
Review
Chemistry, Physical
Heng Wei, Weihua Li, Kareem Bachagha
Summary: This article reviews the research progress of carbon nanotube-based microwave absorbing materials (MAMs) in recent years, covering the fundamental theory, design strategies, synthesis methods, and future development directions.
Article
Chemistry, Physical
Chenguang Shi, Junlong Huang, Zongheng Cen, Tan Yi, Shaohong Liu, Ruowen Fu
Summary: This study developed a high-performance Li metal host material, which achieved dendrite-free Li deposition with a low nucleation overpotential and high Coulombic efficiencies through the combination of Ti3C2-g-PV4P sheets and Ag nanoparticles. The full cells assembled with the Li@host anode and LiFePO4 cathode exhibited high discharge capacity and excellent cycling stability, demonstrating a perspective design for future energy storage devices.
Article
Chemistry, Physical
Tomotaro Mae, Kentaro Kaneko, Hiroki Sakurai, Suguru Noda
Summary: A new partial prelithiation method for SiO/C-CNT electrodes was developed, which showed reduced irreversible capacity and achieved high energy densities with good reversibility. The method allows for precise control of the degree of prelithiation and is applicable to various chemistries.