A5035646855- Metal-Organic Frameworks: Synthesis and Applications
- Covalent Organic Framework Applications
- Hydrogen Storage and Materials
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Ammonia Synthesis and Nitrogen Reduction
- Membrane Separation and Gas Transport
- Advanced Photocatalysis Techniques
- Boron and Carbon Nanomaterials Research
- Boron Compounds in Chemistry
- Carbon dioxide utilization in catalysis
- Advanced Battery Materials and Technologies
- Electrocatalysts for Energy Conversion
- Carbon Nanotubes in Composites
- Magnetism in coordination complexes
- Catalytic Processes in Materials Science
- Advancements in Battery Materials
- Zeolite Catalysis and Synthesis
- CO2 Reduction Techniques and Catalysts
- Carbon Dioxide Capture Technologies
- Superconductivity in MgB2 and Alloys
- Machine Learning in Materials Science
- Graphene research and applications
- Enhanced Oil Recovery Techniques
- Inorganic Fluorides and Related Compounds
NIST Center for Neutron Research
2016-2025
National Institute of Standards and Technology
2016-2025
Hainan University
2024-2025
Royal Women's Hospital
2025
The University of Melbourne
2025
Shandong University
2006-2024
Shanghai University
2022-2024
South China University of Technology
2021-2024
Energy Research Institute
2024
Shandong Maternal and Child Health Hospital
2023-2024
ConspectusDiscoveries of novel functional materials have played very important roles to the development science and technologies thus benefit our daily life. Among diverse materials, metal–organic framework (MOF) are rapidly emerging as a unique type porous organic/inorganic hybrid which can be simply self-assembled from their corresponding inorganic metal ions/clusters with organic linkers, straightforwardly characterized by various analytical methods. In terms porosity, they superior other...
Metal−organic frameworks (MOFs), also known as coordination polymers, represent an interesting type of solid crystalline materials that can be straightforwardly self‐assembled through the metal ions/clusters with organic linkers. Owing to modular nature and mild conditions MOF synthesis, porosities systematically tuned by judicious selection molecular building blocks, a variety functional sites/groups introduced into ions/clusters, linkers, or pore spaces pre‐designing post‐synthetic...
UiO-66 is a highly important prototypical zirconium metal–organic framework (MOF) compound because of its excellent stabilities not typically found in common porous MOFs. In perfect crystal structure, each Zr metal center fully coordinated by 12 organic linkers to form connected framework. Using high-resolution neutron power diffraction technique, we the first direct structural evidence showing that real material contains significant amount missing-linker defects, an unusual phenomenon for...
Single-walled carbon nanotube (SWNT)/poly(methyl methacrylate) (PMMA) nanocomposites were prepared via our coagulation method providing uniform dispersion of the nanotubes in polymer matrix. Optical microscopy, Raman imaging, and SEM employed to determine at different length scales. The linear viscoelastic behavior electrical conductivity these investigated. At low frequencies, G' becomes almost independent frequency as loading increases, suggesting an onset solidlike nanocomposites. By...
The trade-off between physical adsorption capacity and selectivity of porous materials is a major barrier for efficient gas separation purification through physisorption. We report control over pore chemistry size in metal coordination networks with hexafluorosilicate organic linkers the purpose preferential binding orderly assembly acetylene molecules cooperative host-guest and/or guest-guest interactions. specific sites are validated by modeling neutron powder diffraction studies. energies...
A preference for ethane Industrial production of ethylene requires its separation from in a cryogenic process that consumes large amounts energy. An alternative would be differential sorption microporous materials. Most these materials bind more strongly ethane, but adsorption efficient. Li et al. found metal-organic framework containing iron-peroxo sites bound than and could used to separate the gases at ambient conditions. Science , this issue p. 443
Well-aligned macroscopic fibers composed solely of single-walled carbon nanotubes (SWNTs) were produced by conventional spinning. Fuming sulfuric acid charges SWNTs and promotes their ordering into an aligned phase individual mobile surrounded anions. This ordered dispersion was extruded via solution spinning continuous lengths neat SWNT fibers. Such possess interesting structural composition physical properties.
Metal-organic frameworks (MOFs) have been emerging as promising multifunctional materials and shown particularly useful applications for gas storage separation. We briefly outlined the early development of this very active research field to provide us a clear picture on what are MOFs how endeavor has initiated explored. Following that, we demonstrated why so unique separation: high porosities, tunable framework structures, immobilized functional sites fully make use pore space storage,...
We found that metal-organic framework (MOF) compounds M(2)(dhtp) (open metal M = Mg, Mn, Co, Ni, Zn; dhtp 2,5-dihydroxyterephthalate) possess exceptionally large densities of open sites. By adsorbing one CH(4) molecule per metal, these sites alone can generate very methane storage capacities, 160-174 cm(3)(STP)/cm(3), approaching the DOE target 180 cm(3)(STP)/cm(3) for material-based at room temperature. Our adsorption isotherm measurements 298 K and 35 bar five yield excess capacities...
Metal-organic frameworks (MOFs) with open metal sites exhibit a much stronger H2 binding strength than classical MOFs, due to the direct interaction between and coordinately unsaturated ions. Here we report systematic study of adsorption on series isostructural M2(dhtp) (M = Mg, Mn, Co, Ni, Zn). The experimental, initial isosteric heats for (Qst) these MOFs range from 8.5 12.9 kJ/mol, increasing Qst in following order: Zn, Ni. energies derived first-principles calculation follow same trend...
Selective separation of acetylene (C2H2) from carbon dioxide (CO2) or ethylene (C2H4) needs specific porous materials whose pores can realize sieving effects while pore surfaces differentiate their recognitions for these molecules similar molecular sizes and physical properties. We report a microporous material [Zn(dps)2(SiF6)] (UTSA-300, dps = 4,4′-dipyridylsulfide) with two-dimensional channels about 3.3 Å, well-matched the C2H2. After activation, network was transformed to its closed-pore...
Abstract The integration of heterometallic units and nanostructures into metal–organic frameworks (MOFs) used for the oxygen evolution reaction (OER) can enhance electrocatalytic performance help elucidate underlying mechanisms. We have synthesized a series stable MOFs (CTGU‐10a1–d1) based on trinuclear metal carboxylate clusters hexadentate ligand with (6,6)‐connected nia net. also present strategy to synthesize hierarchical bimetallic MOF (CTGU‐10a2–d2). Among these, CTGU‐10c2 is best...
We report hydrogen and methane adsorption isotherms in two prototypical metal−organic framework compounds (i.e., MOF5 ZIF8) over a large temperature (30−300 K) pressure (up to 65 bar) range using fully computer-controlled Sieverts apparatus. find that, volumetric method, proper choice of real gas equation state is critical for obtaining reliable isotherm data. The widely used van der Waals (EOS) not adequate describe H2 CH4, while the modified Benedict−Webb−Rubin (MBWR) EOS works well, even...
Using the difference Fourier analysis of neutron powder diffraction data along with first-principles calculations, we reveal detailed structural information such as methyl group orientation, hydrogen adsorption sites, and binding energies within nanopore structure ZIF8 (Zn(MeIM)2). Surprisingly, two strongest sites that identified are both directly associated organic linkers, instead ZnN4 clusters, in strong contrast to classical MOFs, where metal-oxide clusters primary sites. These...