Article
Engineering, Chemical
Wojciech Szmyt, Carlos Guerra-Nunez, Clemens Dransfeld, Ivo Utke
Summary: This study identified the specific parameters affecting gas diffusion kinetics and provided analytical expressions to describe gas transport in these structures. The analytical solutions were confirmed through Monte Carlo simulations, and the applicability of these findings in other fields was highlighted.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Jingmeng Wan, Hao-Long Zhou, Kim Hyeon-Deuk, I-Ya Chang, Yuhang Huang, Rajamani Krishna, Jingui Duan
Summary: A soft nanoporous crystal has been developed that can separate propyne/propylene mixtures by sieving. This occurs by the rotational movement of pyridyl rings within this framework creating a pore with a maximum size of 4.4 angstrom, thereby facilitating the adsorption of propyne while completely excluding propylene.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Chemical
Wan-Chi Lee, Luc Bondaz, Shiqi Huang, Guangwei He, Mostapha Dakhchoune, Kumar Varoon Agrawal
Summary: Reinforced graphene membranes with a two-layer composite carbon film successfully prevent crack formation during gas separation, ensuring mechanical strength and avoiding cracks at centimeter scales. The hierarchical pore structure in the composite carbon film plays a crucial role in achieving gas-sieving graphene membranes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Long Cheng, Yanan Guo, Quan Liu, Guozhen Liu, Renhao Li, Xi Chen, Hui Zeng, Gongping Liu, Wanqin Jin
Summary: This study reports a metal confined 2D sub-nanometer channel that successfully discriminates ethylene over ethane through molecular recognition and sieving. The resulting ultrathin membrane exhibits superior separation performance and has wide application potential.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Mengtao Tian, Lei Wang, Jin Wang, Shuchang Zheng, Fudi Wang, Ning Shao, Lele Wang
Summary: This study evaluates the application potential of 2D vermiculite (VMT) nanomaterials in high-performance membrane development. Large-scale 2D VMT nanosheets were prepared using a simple method, and the VMT membrane showed excellent stability, fast solvent permeance, and ion sieving ability. The broad applicability of the VMT membrane was also confirmed through intercalation optimization strategy.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Multidisciplinary Sciences
P. Z. Sun, M. Yagmurcukardes, R. Zhang, W. J. Kuang, M. Lozada-Hidalgo, B. L. Liu, H. -m. Cheng, F. C. Wang, F. M. Peeters, I. V. Grigorieva, A. K. Geim
Summary: Researchers have successfully demonstrated the creation of angstrom-sized pores in monolayer graphene through low intensity exposure to low kV electrons, through which helium and hydrogen can permeate easily while larger species like xenon and methane are blocked. Gas transport through these pores experience activation barriers that increase quadratically with molecules' kinetic diameter.
NATURE COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Jie Zhang, Zhishang Li, Qi Zhang, Lin Zhang, Tongtong Ma, Xinyue Ma, Kang Liang, Yibin Ying, Yingchun Fu
Summary: In this study, a unique nanolaminate film consisting of MXene nanosheets intercalated with MOF nanoparticles was developed. The intercalation of MOFs created nanochannels between MXene nanosheets, promoting fast water permeance. The film integrated size exclusion and selective adsorption mechanisms, enabling a rapid and selective liquid phase separation paradigm that performs simultaneous multiple chemicals and nanoparticles sieving.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Christoph Strangfeld
Summary: This study quantifies the influence of partially saturated pores on gas diffusion by investigating different pore geometries and size distributions. It demonstrates that water layer thickness significantly affects effective diffusion for pore radii below 50 nm.
ADVANCED ENGINEERING MATERIALS
(2021)
Review
Engineering, Chemical
Chong Yang Chuah, Tae-Hyun Bae
Summary: Carbon molecular sieve membranes (CMSMs) have attracted significant research attention due to their ability to overcome the trade-off limitation between permeability and selectivity in gas separation polymeric membranes. This review examines the critical aspects in the development of CMSMs based on polyimide precursors, including pre-treatment, pyrolysis, and post-treatment conditions. It also discusses the mass transfer mechanism, characterization methods, performances against the Robeson upper bound limit, pilot-scale applications, economic analysis, and challenges and perspective of CMSM-based gas separation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Jian Li, Lei Li, Xin Li, Liangliang Dong, Zhenyu Wang, Jiangnan Shen, Bart Van der Bruggen
Summary: A novel nanofiltration selective layer with in-situ formed ZIF-8 was successfully fabricated using an integrated vacuum filtration and interfacial polymerization method. The selective layer exhibited excellent molecular sieving ability and pure water permeability.
Article
Energy & Fuels
Chengzhen Sun, Cheng Liu, Kailin Luo, Bofeng Bai
Summary: Two-dimensional bilayer nanopores constructed with graphene-hexagonal boron nitride show promising potential for high-permeance molecular sieving. The quasi-unidirectional molecular transport is achieved due to the distinctive adsorption abilities of gas molecules on the two sides of bilayer nanopores and the inhibited molecular backflow. This work provides a promising approach for ultra-permeable porous membranes with even higher molecular permeance than single-layer atomic-thickness membranes.
FRONTIERS IN ENERGY RESEARCH
(2021)
Article
Thermodynamics
Pierre Magnico, Quy-Dong To
Summary: We investigate and model the collisions and self diffusion processes of dilute Helium gas in nano-metric graphite channels using molecular dynamics. The collisions at high temperature are mostly specular with short resident time, while at low temperature, gas atoms stay longer near the surface and surface diffusion becomes dominant. We propose a waiting time model based on residence time distribution, coupled with ballistic-diffusive surface motion and Cercignani-Lampis scattering model.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Chemical
Katerina Setnickova, Tse-Chiang Huang, Ching-Ting Wang, Yi-Chen Lin, Sher Ling Lee, Guo-Liang Zhuang, Kuo-Lun Tung, Hui-Hsin Tseng, Petr Uchytil
Summary: This study investigates the importance of the intermediate layer in carbon molecular sieve membrane formation and its impact on gas separation performance. Experimental results show that preparation conditions significantly affect the structure and separation efficiency of CMS/TiO2 membranes, with the thickness of the intermediate TiO2 layer and the defect level of the carbon separation layer playing key roles in membrane performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Maryam Mirzaei, Javad Karimi-Sabet, Sepehr Nikkho, Jafar Towfighi-Darian
Summary: A novel transfer technique for the fabrication of graphene membrane on a porous polymer substrate was developed in this study, resulting in crack-free large-area graphene film. The graphene membrane exhibited high gas molecular sieving performance, especially in helium and hydrogen gas separation.
ACS APPLIED NANO MATERIALS
(2022)
Article
Engineering, Chemical
Zefeng Jiang, Lu Wang, Wenjuan Xue, Mingze Zheng, Xiangyu Guo, Hongliang Huang, Chongli Zhong
Summary: Molecular-sieving separation of isomeric C4 paraffins, n-butane and isobutane, using an adenine-based MOF, IPM-101, demonstrates high separation efficiency, excellent regeneration ability, and potential application in industry.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Endocrinology & Metabolism
Andrea J. Glenn, Jie Li, Kenneth Lo, David J. A. Jenkins, Beatrice A. Boucher, Anthony J. Hanley, Cyril W. C. Kendall, Aladdin H. Shadyab, Lesley F. Tinker, Steven D. Chessler, Barbara V. Howard, Simin Liu, John L. Sievenpiper
Summary: This study analyzed the relationship between diet patterns and incident type 2 diabetes in 145,299 postmenopausal women without diabetes. The findings showed that greater adherence to the Portfolio, DASH, and Mediterranean diets was associated with a lower risk of type 2 diabetes in postmenopausal women.
Article
Nutrition & Dietetics
Jie Li, Xia Zou, Fei Zhong, Qingling Yang, JoAnn E. Manson, George D. Papandonatos, Lingling Zheng, Wen-Chih Wu, Kei Hang Katie Chan, Yan Song, Jian Kuang, Simin Liu
Summary: Prenatal exposure to the Chinese famine of 1959-1962 was associated with increased risk of diabetes in men but not in women, independent of age.
EUROPEAN JOURNAL OF NUTRITION
(2023)
Article
Chemistry, Physical
Kai Wang, Chen Han, Fuping Li, Yu Liu, Zongping Shao, Lihong Liu, Shaobin Wang, Shaomin Liu
Summary: A series of strontium cobaltite perovskite oxides with different dopants were designed and investigated for their catalytic activity in degrading aqueous organic pollutants. The study found that the crystalline structure and surface properties of the oxides are correlated with their catalytic activity, with the Co-O bond length being a key factor in peroxymonosulfate (PMS) activation. This study provides new insights for the design of efficient perovskite oxide catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Chemical
Chenyang Deng, Zhifei Hu, Mingming Wang, Yanan Wang, Zhigang Wang, Tianjia Chen, Xiaoyao Tan, Shaomin Liu
Summary: The sintering process is crucial for nickel hollow fiber membranes (NHFMs), and optimizing the sintering conditions significantly affects the hydrogen permeability and qualified rate of the membranes. This study extensively investigates the effects of sintering conditions on microstructure and hydrogen permeation of NHFMs. Results show that smaller metal grain size leads to enhanced hydrogen permeability, and sintering temperatures significantly affect the grain size and activation energy. Increasing sintering time and hydrogen concentration have minor effects on grain size and hydrogen permeation.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Chemical
Zhiyuan Liu, Shiying Fan, Xinyong Li, Zhaodong Niu, Jing Wang, Chunpeng Bai, Jun Duan, Moses O. Tade, Shaomin Liu
Summary: We demonstrate a composite photocatalyst for nitric oxide conversion with a Cu-Fe alloy, graphitic carbon nitride (g-C3N4), and ZnIn2S4. The superior photocatalytic performance of 6.45-fold that of g-C3N4 was confirmed. The delay effect on charge recombination was observed through time-resolved photoluminescence, and heterojunction establishment was attributed to the hole-trapping ability of ZnIn2S4. The combined effects of the Cu-Fe alloy were confirmed by NO-specific adsorption and conversion experiments, and the active species involved were examined via electron spin resonance. Density functional theory calculations revealed the molecular mechanisms of photocatalytic conversion of NO to NO3-. Therefore, g-C3N4|ZnIn2S4|CuFe has potential for sustainable and efficient pollutant conversion.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Yazi Liu, Yue Sun, En Zhao, Weiwei Yang, Jinkai Lin, Qiang Zhong, Haifeng Qi, Aixin Deng, Shaogui Yang, Huayang Zhang, Huan He, Shaomin Liu, Zupeng Chen, Shaobin Wang
Summary: This study reports the preparation of atomically dispersed Co-Ag dual-metal sites anchored on P-doped carbon nitride (Co1Ag1-PCN) via supramolecular and solvothermal approaches, which exhibit desirable performance for photocatalytic H-2 evolution from water splitting. The optimized Co1Ag1-PCN catalyst achieves a remarkable hydrogen production rate of 1190 mu mol g(-1) h(-1) with an apparent quantum yield (AQY) of 1.49% at 365 nm, surpassing most of the newly reported metal-N-coordinated photocatalysts. The enhanced photocatalytic activity is attributed to the synergistic effect of Co-Ag dual sites with exclusive coordination configuration of Co-N-6 and Ag-N2C2, which enhances the charge density and facilitates the formation of H* intermediates.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Environmental
Guoqiang Song, Claudia Li, Wenjun Zhou, Libo Wu, Kang Hui Lim, Feiyang Hu, Tianchang Wang, Shaomin Liu, Zhifeng Ren, Sibudjing Kawi
Summary: This study reports a structure-reconstruction strategy based on a micropore-confined process to prepare yolk-shell catalysts with highly dispersed metallic nickel. The size of the nickel particles has a significant impact on the rates of methane decomposition, penetration of dissolved carbon, and growth of carbon nanotubes (CNTs), which provides an important route for the design of functionalized CDM catalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Ceramics
Yanyong Shi, Jie Wang, Claudia Li, Jian Song, Bo Meng, Jaka Sunarso, Xiuxia Meng, Naitao Yang, Xiaoyao Tan, Shaomin Liu
Summary: La0.6Ca0.4Co0.2Fe0.8O3-8 (LCCF) ceramic powder was used to fabricate LCCF hollow fiber (HF) membranes via a sol-gel method. Three types of LCCF HF membranes were developed by changing the composition of the internal coagulation bath. The best performance was achieved using a mixture of NMP + EtOH. The developed LCCF membrane exhibited high oxygen transport capability and good stability.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Engineering, Chemical
Christelle Yacou, Adrian Leo, Julius Motuzas, Simon Smart, Shude Zhang, Shaomin Liu, Joao C. Diniz da Costa
Summary: This study presents the preparation, characterization, and oxygen separation performance of catalytic surface modified BSCC perovskite hollow fibers. The BSCC hollow fibers were prepared by phase inversion and sintering, and then surface modified with Ag nanoparticles as a catalyst. The Ag-BSCC hollow fibers showed significantly higher oxygen fluxes compared to the blank BSCC hollow fibers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Zhengwei Zhou, Shude Zhang, Xiuxia Meng, Jian Song, Naitao Yang, Claudia Li, Sibudjing Kawi, Shaomin Liu
Summary: In this study, a La0.8Ca0.2Fe0.94O3-6-0.05Ag (LCF-Ag) hollow fiber membrane with three-layer sandwich structure was successfully prepared. The oxygen permeation flux of the membrane structure was 1.79 times higher than that of the traditional membrane structure, with a maximum oxygen flux of 2.15 mL min-1 cm-2. The membrane showed high stability during a 240-hour long-term operation, and the oxygen flux could be fully recovered by switching the sweep gas to He, indicating its good chemical stability. These results demonstrate the feasibility of the new membrane structure for oxygen separation with CO2 resistance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Jinghu Chen, Qineng Xia, Yong Guo, Yangang Wang, Xi Li, Mingming Wang, Jieshan Qiu, Yanqin Wang, Maria Veronica Sofianos, Shaomin Liu
Summary: A Pt-loaded Nb-W composite oxide catalyst is developed for the selective hydrogenolysis of glycerol to 1,3-propanediol. This catalyst demonstrates precise activation and cleavage of secondary C-O (C(2)-O) bonds, resulting in high yield of catalytic conversion of glycerol.
Review
Chemistry, Multidisciplinary
Bin Wang, Tao Li, Zhigang Wang, Mohd Hafiz Dzarfan Othman, Shaomin Liu, Rui Xiao
Summary: Hydrogen is a carbon-free energy carrier and water is an environmentally-friendly source for its production. Coupling catalytic water splitting with a mixed ionic-electronic conducting (MIEC) membrane reactor has shown great potential in enhancing hydrogen production. This review comprehensively covers critical aspects of this process, including materials, structure, morphology, catalysts, and operating conditions. Furthermore, integrating methane-related oxidation reactions can further intensify the process and improve the hydrogen production rate. Future development trends are also summarized.
Article
Chemistry, Physical
Jie Wang, Baolei Shao, Claudia Li, Jian Song, Bo Meng, Xiuxia Meng, Naitao Yang, Sibudjing Kawi, Jaka Sunarso, Xiaoyao Tan, Shaomin Liu
Summary: In this study, a ceramic hydrogen permeable membrane reactor was developed for the simultaneous reaction and separation process, allowing the production of synthesis gas and pure hydrogen while reducing greenhouse gas emissions.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Yu Qin, Shiying Fan, Jinsuo Gao, Moses O. Tade, Shaomin Liu, Xinyong Li
Summary: Cu-doped CoMn2O4 catalysts showed excellent catalytic performance in NO reduction by CO, with Cu0.3Co0.7Mn2O4 achieving 100% NO conversion and 80% N2 selectivity at 250 degrees C. Structural analysis revealed that the introduced Cu replaces some Co in tetrahedral coordination, resulting in a strong synergistic effect between different metals.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Shuo Li, Wei-Yao Han, Zhao-Xu Wang, Yu-Jie Sun, Zilong Zheng, Ming-Jie Yin, Shaomin Liu, Quan-Fu An
Summary: High MOF-loaded mixed-matrix membranes (MMMs) with enhanced gas separation performance were developed using a 'dormancy and double-activation' strategy. The optimized MMM showed significantly improved CO2 permeability and good anti-plasticization behavior, making it suitable for carbon capture applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)