A5038212111- Metal-Organic Frameworks: Synthesis and Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Covalent Organic Framework Applications
- Zeolite Catalysis and Synthesis
- Catalytic Processes in Materials Science
- Carbon Nanotubes in Composites
- Mesoporous Materials and Catalysis
- Graphene research and applications
- Radioactive element chemistry and processing
- Diamond and Carbon-based Materials Research
- Catalysis and Oxidation Reactions
- Boron and Carbon Nanomaterials Research
- Membrane Separation Technologies
- CO2 Reduction Techniques and Catalysts
- Machine Learning in Materials Science
- Dendrimers and Hyperbranched Polymers
- Ionic liquids properties and applications
- MXene and MAX Phase Materials
- Nanocluster Synthesis and Applications
- Crystallography and molecular interactions
- Advanced Photocatalysis Techniques
- Advanced materials and composites
- Magnetic properties of thin films
- Nanopore and Nanochannel Transport Studies
King Abdullah University of Science and Technology
2016-2025
Saudi Aramco (Saudi Arabia)
2025
Xi’an University of Posts and Telecommunications
2024
University of Lincoln
2023-2024
Dalian University of Technology
2012-2022
State Key Laboratory of Clean Energy Utilization
2021
Zhejiang University
2021
University of Chinese Academy of Sciences
2013-2014
Dalian Institute of Chemical Physics
2013-2014
Chinese Academy of Social Sciences
2013
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 new metal-organic framework Zn2(H2O)(dobdc)·0.5(H2O) (UTSA-74, H4dobdc = 2,5-dioxido-1,4-benzenedicarboxylic acid), Zn-MOF-74/CPO-27-Zn isomer, has been synthesized and structurally characterized. It a novel four coordinated fgl topology with one-dimensional channels of about 8.0 Å. Unlike metal sites in the well-established MOF-74 rod-packing structure which each them is five coordinate square pyramidal coordination geometry, there are two different Zn(2+) within binuclear secondary...
Abstract As an alternative technology to energy intensive distillations, adsorptive separation by porous solids offers lower cost and higher efficiency. Herein we report a topology-directed design synthesis of series Zr-based metal-organic frameworks with optimized pore structure for efficient C6 alkane isomers, critical step in the petroleum refining process produce gasoline high octane rating. Zr 6 O 4 (OH) (bptc) 3 adsorbs large amount n -hexane but excluding branched isomers. The uptake...
Oxide-/hydroxide-derived copper electrodes exhibit excellent selectivity toward C2+ products during the electrocatalytic CO2 reduction reaction (CO2RR). However, origin of such enhanced remains controversial. Here, we prepared two Cu-based with mixed oxidation states, namely, HQ-Cu (containing Cu, Cu2O, CuO) and AN-Cu Cu(OH)2). We extracted an ultrathin specimen from using a focused ion beam to investigate distribution evolution various Cu species by electron microscopy energy loss...
Adsorptive separation of olefin/paraffin mixtures by porous solids can greatly reduce the energy consumption associated with currently employed cryogenic distillation technique. Here, complete propane and propylene a designer microporous metal-organic framework material is reported. The compound, Y6 (OH)8 (abtc)3 (H2 O)6 (DMA)2 (Y-abtc, abtc = 3,3',5,5'-azobenzene-tetracarboxylates; DMA dimethylammonium), rationally designed through topology-guided replacement inorganic building units....
Abstract Adsorption‐based iodine (I 2 ) capture has great potential for the treatment of radioactive nuclear waste. In this study, we apply a “multivariate” synthetic strategy to construct ionic covalent organic frameworks (iCOFs) with large surface area, high pore volume, and abundant binding sites I capture. The optimized material iCOF‐AB‐50 exhibits static uptake capacity 10.21 g −1 at 75 °C dynamic 2.79 ≈400 ppm 25 °C, far exceeding performances previously reported adsorbents under...
Effective capture of radioactive organic iodides from nuclear waste remains a significant challenge due to the drawbacks current adsorbents such as low uptake capacity, high cost, and non-recyclability. We report here general approach overcome this by creating iodide molecular traps through functionalization metal-organic framework materials with tertiary amine-binding sites. The trap exhibits CH3I saturation capacity 71 wt% at 150 °C, which is more than 340% higher industrial adsorbent...
Radioactive molecular iodine (I2) and organic iodides, mainly methyl iodide (CH3I), coexist in the off-gas stream of nuclear power plants at low concentrations, whereas few adsorbents can effectively adsorb low-concentration I2 CH3I simultaneously. Here we demonstrate that adsorption occur on various adsorptive sites be promoted through intermolecular interactions. The capacity is positively correlated with content strong binding but unrelated to textural properties adsorbent. These insights...
The capture of radioactive I2 vapor from nuclear waste under industrial operating conditions remains a challenging task, as the practical high temperature (≥150 °C) and low concentration (∼150 ppmv) are unfavorable for adsorption. We report novel guanidinium-based covalent organic framework (COF), termed TGDM, which can efficiently conditions. At 150 °C ppmv I2, TGDM exhibits an uptake ∼30 wt %, is significantly higher than that silver-based adsorbents such Ag@MOR (17 %) currently used in...
Integrated differential phase-contrast scanning transmission electron microscopy (iDPC-STEM) is capable of directly probing guest molecules in zeolites, owing to its sufficient and interpretable image contrast for both heavy light elements under low-dose conditions. This unique ability demonstrated by imaging volatile organic compounds adsorbed zeolite Silicalite-1; iDPC-STEM was then used investigate molybdenum supported on various zeolites including Silicalite-1, ZSM-5, mordenite. Isolated...
Copper (Cu)-based catalysts generally exhibit high C2+ selectivity during the electrochemical CO2 reduction reaction (CO2RR). However, origin of this and influence catalyst precursors on it are not fully understood. We combine operando X-ray diffraction Raman spectroscopy to monitor structural compositional evolution three Cu CO2RR. The results indicate that despite different kinetics, all completely reduced Cu(0) with similar grain sizes (~11 nm), oxidized species involved in Furthermore,...
This review discusses the current status and challenges in development of novel iodine capture adsorbents, focusing on adsorption mechanisms evaluation methods.
Zeolitic imidazolate framework 8 (ZIF-8) is effective for C 3 H 6 /C separation because of the “sieving effect” a six-membered (6-M) window. Here, we demonstrate that ZIF-8 versatile material could effectively separate 2 4 from via its 4-M window along <100> direction. We established facile and environmentally friendly carbon nanotube (CNT)–induced oriented membrane (CNT-OM) approach to fabricate {100}-oriented (100-M). In this approach, 2-methyimidazole was anchored onto CNT surface...
Atomically precise metal nanoclusters (NCs) have become an important class of catalysts due to their catalytic activity, high surface area, and tailored active sites. However, the design development bond-forming reaction based on copper NCs are still in early stages. Herein, we report synthesis atomically nanocluster with a planar core unique shell, [Cu45(TBBT)29(TPP)4(C4H11N)2H14]2+ (Cu45) (TBBT: 4-tert-butylbenzenethiol; TPP: triphenylphosphine), yield via one-pot reduction method. The...
Two-dimensional (2D) materials have long been considered as ideal platforms for developing separation membranes. However, it is difficult to generate uniform subnanometer pores over large areas on 2D materials. We report that the well-defined eight-membered ring (8-MR) pores, typically formed at boundaries of two antiparallel grains monolayer molybdenum disulfide (MoS 2 ), can serve molecular sieves efficient water-ion separation. The density grain and, consequently, number 8-MR be tuned by...
Clean separation of linear, monobranched, and dibranched alkanes is achieved using a flexible, microporous metal–organic framework (MOF).
Copper-based nanomaterials have attracted tremendous interest due to their unique properties in the fields of photoluminescence and catalysis. As a result, studies on correlation between molecular structure are great importance. Copper nanoclusters new class that can provide an atomic-level view crystal copper nanoparticles. Herein, high-nuclearity nanocluster with 81 atoms, formulated as [Cu81(PhS)46(tBuNH2)10(H)32]3+ (Cu81), was successfully synthesized fully studied by X-ray...
The adsorption mechanism of ethane, ethylene, and acetylene (C2Hn; n = 2, 4, 6) on two microporous metal organic frameworks (MOFs) is described here that consistent with observations from single crystal powder X-ray diffraction, calorimetric measurements, gas isotherm measurements. Two calcium-based MOFs, designated as SBMOF-1 SBMOF-2 (SB: Stony Brook), form three-dimensional one-dimensional open channels. As determined diffraction experiments, channel geometries both provide multiple sites...
Creation of more effective open metal sites <italic>via</italic> individual tuning missing-linker or missing-cluster defects greatly enhances their catalytic performance.
The separation of alkanes with different degrees branching, particularly mono- and dibranched isomers, represents a challenging yet important industrial process for the production premium gasoline blending components high octane number. We report here linear/monobranched through complete molecular sieving by robust aluminum-based MOF material, Al-bttotb (H3bttotb = 4,4′,4″-(benzene-1,3,5-triyltris(oxy))tribenzoicacid). Single- multicomponent adsorption experiments reveal that material...
The production of 1-butene by ethylene dimerization is an important chemical industrial process currently implemented using homogeneous catalysts. Here, we describe a highly active heterogeneous catalyst (Ni-ZIF-8) for dimerization, which consists isolating Ni-active sites selectively located on the crystal surface zeolitic imidazolate framework. Ni-ZIF-8 can be easily prepared simple one-pot synthesis method in site-specific anchoring Ni achieved spontaneously because incompatibility...
Abstract The separation of n ‐alkanes from their branched isomers is vitally important to improve octane rating gasoline. To facilitate mass transfer, adsorptive usually operated under high temperatures in industry, which require considerable energy. Herein, we present a kind dynamic pillar‐layered MOF that exhibits self‐adjustable structure and pore space, behavior induced by guest molecules. A combination the flexibility framework with commensurate adsorption for ‐hexane results...