A5072476367- Metal-Organic Frameworks: Synthesis and Applications
- Covalent Organic Framework Applications
- Membrane Separation and Gas Transport
- Membrane Separation Technologies
- Phase Equilibria and Thermodynamics
- Zeolite Catalysis and Synthesis
- Carbon Dioxide Capture Technologies
- X-ray Diffraction in Crystallography
- Machine Learning in Materials Science
- Nanopore and Nanochannel Transport Studies
- Crystallization and Solubility Studies
- Material Dynamics and Properties
- Membrane-based Ion Separation Techniques
- Thermodynamic properties of mixtures
- Spectroscopy and Quantum Chemical Studies
- Carbon dioxide utilization in catalysis
- Graphene research and applications
- Catalytic Processes in Materials Science
- Luminescence and Fluorescent Materials
- Surfactants and Colloidal Systems
- Fuel Cells and Related Materials
- Crystallography and molecular interactions
- Electrostatics and Colloid Interactions
- Domain Adaptation and Few-Shot Learning
- Block Copolymer Self-Assembly
National University of Singapore
2016-2025
University of Chinese Academy of Sciences
2025
Alibaba Group (United States)
2021-2024
Chang'an University
2022-2024
Jiangxi Normal University
2013-2022
China Southern Power Grid (China)
2021
Alibaba Group (China)
2021
King Abdullah University of Science and Technology
2012
Institute of Metallurgy
2011
East China University of Science and Technology
1997-2010
An asymmetric supercapacitor (ASC) was fabricated using reduced graphene oxide (RGO) sheets modified with ruthenium (RGO–RuO2) or polyaniline (RGO–PANi) as the anode and cathode, respectively. The ASC exhibited a significantly improved capacitive performance in comparison that of symmetric supercapacitors RGO–RuO2 RGO–PANi electrodes. improvement attributed to broadened potential window an aqueous electrolyte, leading energy density 26.3 W h kg−1, about two-times higher than symmetrical...
Abstract It is highly desirable to reduce the membrane thickness in order maximize throughput and break trade-off limitation for membrane-based gas separation. Two-dimensional membranes composed of atomic-thick graphene or oxide nanosheets have transport pathways that are at least three orders magnitude higher than thickness, leading reduced permeation flux impaired separation throughput. Here we present nm-thick molecular sieving porous two-dimensional metal-organic nanosheets. These...
Storage of pure CO2 and CH4 separation their binary mixture in three different classes nanostructured adsorbents--silicalite, C168 schwarzite, IRMOF-1--have been compared at room temperature using atomistic simulation. is represented as a spherical Lennard-Jones molecule, rigid linear molecule with quadrupole moment. For component adsorption, preferentially adsorbed than all the adsorbents over pressure range under this study, except schwarzite high pressures. The simulated adsorption...
Functionalized graphene was prepared by reducing functionalized oxide with poly(diallyldimethylammonium chloride) (PDDA), transferring the surface charge of reduced (RGO) from negative to positive. A composite material RGO manganese dioxide (MnO2) nanosheets can be obtained dispersing negatively charged MnO2 on sheets via an electrostatic coprecipitation method. The structures composites were investigated high-resolution transmission electron microscopy (HRTEM), which indicated that...
Covalent organic frameworks (COFs) have emerged as a novel platform for material design and functional explorations, but it remains challenge to synthetically functionalize targeted structures task-specific applications. Optically pure 1,1′-bi-2-naphthol (BINOL) is one of the most important sources chirality synthesis materials science, has not yet been used in construction COFs enantioselective processes. Here, by elaborately designing choosing an enantiopure BINOL-based linear dialdehyde...
Significance Today, amino acids are primarily manufactured via microbial cultivation processes, which costly, time consuming, and require extensive separations processes. As an alternative, chemocatalytic approaches to produce from renewable feedstocks such as bio-based sugars could offer a rapid potentially more efficient means of acid synthesis, but efforts date have been limited by the development facile chemistry associated catalyst materials selectively α-amino acids. In this work,...
Recently, there has been growing interest in hafnium (Hf) metal-organic frameworks (MOFs). These MOFs may perform better as gas adsorbents than zirconium (Zr) due to the presence of Brønsted acid sites with high affinity toward adsorbates, together outstanding chemical and hydrothermal stabilities similar their Zr analogues. However, Hf-MOFs have rarely reported lack effective synthetic methods. We herein report a modulated synthesis UiO-66(Hf)-type MOFs. Among these MOFs, UiO-66(Hf)-(OH)2...
Abstract Molecular rotors have played an important role in recent materials chemistry. Although several studies on functional containing molecular been reported for fluorescence sensing, this concept has yet to be realized two-dimensional (2D) materials. Here we report the preparation of all-carbon, π-conjugated 2D porous organic nanosheets, named NUS-24, which contain flexible tetraphenylethylene (TPE) units as rotors. NUS-24 nanosheets exhibit high stability, large lateral size, and...
While crystalline covalent organic frameworks (COFs) linked by C–C bonds are highly desired in synthetic chemistry, it remains a formidable challenge to synthesize. Efforts generate single COFs via de novo synthesis usually afford amorphous structures rather than phases. We demonstrate here that bond-based can be prepared direct reduction of C═C bond-linked crystal-to-crystal transformation. By Knoevenagel polycondensation chiral tetrabenzaldehyde dibinaphthyl-22-crown-6 with...
Separation of racemic mixtures is great importance and interest in chemistry pharmacology. Porous materials including metal–organic frameworks (MOFs) have been widely explored as chiral stationary phases (CSPs) resolution. However, it remains a challenge to develop new CSPs for reversed-phase high-performance liquid chromatography (RP-HPLC), which the most popular chromatographic mode accounts over 90% all separations. Here we demonstrated first time that highly stable Zr-based MOFs can be...
The development of methodologies for inducing and tailoring enantioselectivities catalysts is an important issue in asymmetric catalysis. In this work, we demonstrate the first time that chiral molecular can be boosted from completely nonselective to highly enantioselective when installed nanostructured metal-organic frameworks (MOFs). Exfoliation layered crystals one most direct synthetic routes unltrathin nanosheets, but its use MOFs limited by availability MOFs. We illustrate designed...
Resolving single-crystal structures of two-dimensional covalent organic frameworks (2D COFs) is a great challenge, hindered in part by limited strategies for growing high-quality crystals. A better understanding the growth mechanism facilitates development methods to grow 2D COF single Here, we take different perspective explore process tracing intermediates. We discover two mechanisms, nucleation and self-healing, which self-assembly pre-arrangement monomers oligomers are important factors...
Covalent organic cages are a prominent class of discrete porous architectures; however, their structural isomerism remains relatively unexplored. Here, we demonstrate the chiral covalent that renders distinct enantioselective catalytic properties. Imine condensations tetra-topic 5,10-di(3,5-diformylphenyl)-5,10-dihydrophenazine and ditopic 1,2-cyclohexanediamine produce two [4 + 8] cage isomers with totally different topologies geometries depend on orientations four tetraaldehyde units...
We report a molecular simulation study for CO2 storage in metal-organic frameworks (MOFs). As compared to the aluminum-free and cation-exchanged ZSM-5 zeolites carbon nanotube bundle, IRMOF1 exhibits remarkably higher capacity. Incorporation of Na(+) cations into zeolite increases capacity only at low pressures. By variation metal oxide, organic linker, functional group, framework topology, series isoreticular MOFs (IRMOF1, Mg-IRMOF1, Be-IRMOF1, IRMOF1-(NH2)4, IRMOF10, IRMOF13, IRMOF14) are...
A three dimensional -NH(2) functionalized Zeolitic Tetrazolate Framework (ZTF-1) has been reported. The framework adopts a dia topology (M-L-M angle is close to 156°). ZTF-1 shows high CO(2) (273 K) and H(2) (77 uptake due the presence of free group uncoordinated tetrazolate nitrogen.
A molecular simulation study is reported for water desalination in zeolitic imidazolate framework-8 (ZIF-8) membrane. The demonstrates that occurs under external pressure, and Na(+) Cl(-) ions cannot transport across the membrane due to sieving effect of small apertures ZIF-8. flux permeating scales linearly with exhibits an Arrhenius-type relation temperature (activation energy 24.4 kJ∕mol). Compared bulk phase, molecules ZIF-8 are less hydrogen-bonded lifetime hydrogen-bonding considerably...
Making use of the preferred adsorption affinity and capacity to CO(2) as well highly porous structure with huge cavities 2.4 nm, a permeable selective ZIF-95 molecular sieve membrane was developed for separation H(2) from CO(2).
We report a molecular simulation study for the separation of industrially important gas mixtures (CO(2)/H(2), CO(2)/CH(4), and CO(2)/N(2)) in rho zeolite-like metal-organic framework (rho-ZMOF). Rho-ZMOF contains wide-open anionic charge-balancing extraframework Na(+) ions. Two types binding sites ions are identified framework. Site I is single eight-membered ring, whereas site II alpha-cage. at have stronger affinity thus smaller mobility. The rho-ZMOF resemble those its inorganic...
A new force field and a hybrid Monte Carlo/molecular dynamics simulation method are developed to investigate the structural transition of zeolitic imidazolate framework-8 (ZIF-8)induced by N2 sorption. At high loading (approximately 50 N2molecules per unit cell), ZIF-8 shifts from low-loading (LL) high-loading (HL) structure. stepped sorption isotherm is predicted with three distinct regions, which agrees well experimental data. The orientation rings motion framework atoms exhibit sharp...