A5071033120- Covalent Organic Framework Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Membrane Separation and Gas Transport
- Carbon Dioxide Capture Technologies
- Advanced Battery Materials and Technologies
- Hydrogen Storage and Materials
- Advanced Photocatalysis Techniques
- Fluoride Effects and Removal
- Polymer composites and self-healing
- Concrete and Cement Materials Research
- Supramolecular Chemistry and Complexes
- Molecular Sensors and Ion Detection
- Enhanced Oil Recovery Techniques
- Various Chemistry Research Topics
- Polymer Nanocomposites and Properties
Korea Advanced Institute of Science and Technology
2017-2024
Aalto University
2021
Gold recovery from electronic waste could prevent excessive mining with toxic extractants and provide a sustainable path for recycling precious metals. Unfortunately, no viable is practiced, except burning circuit boards in underdeveloped countries, mainly because of the lack chemical scavengers as adsorbents. Here, we report synthesis family porphyrin–phenazine-based polymers their gold-capturing properties well application gold actual e-waste. The show high selectivity toward other Au(III)...
ConspectusAs renewable energy and CO2 utilization technologies progress to make a more significant contribution global emissions reduction, carbon capture remains critical component of the mission. Current involve operations at point sources such as fossil fuel-based power plants or source-agnostic like in direct air capture. Each strategy has its own advantages limitations, but common, they all employ sorption-based methods with use sorbents strongly adhering CO2. Amine solutions are most...
Abstract Ordered mesoporous carbon materials offer robust network of organized pores for energy storage and catalysis applications, but suffer from time‐consuming intricate preparations hindering their widespread use. Here we report a new rapid synthetic route N‐doped ordered structure through preferential heating iron oxide nanoparticles by microwaves. A nanoporous covalent organic polymer is first formed in situ covering the hard templates assembled nanoparticles, paving way long‐range...
A hypercrosslinked ultramicroporous and ordered organic polymer network was synthesized from a planar trimer indole building block called triazatruxene (TAT) through anhydrous FeCl3 catalyzed Friedel–Crafts alkylation using methylal as crosslinker. The is stable in variety of chemicals thermally durable. TATHCP shows high BET (Brunauer–Emmet–Teller) specific surface area 997 m2 g–1 with CO2 uptake capacity 12.55 wt % at 273 K, 1.1 bar. Gas selectivities 38.4 for CO2/N2, 7.8 CO2/CH4, 40.6...
Nanoporous materials could offer sustainable solutions to gas capture and precious metal recovery from electronic waste. Despite this potential, few reports combine target functionalities with physical properties such as morphology control. Here, we report a nanoporous polymer microspherical that selectively gold mixture of 15 common transition metals. When its nitriles are converted into amidoxime, the capacity increases more than 20-fold. Amidoximes also very effective in CO2 binding show...
Making metal–organic frameworks (MOFs) that are stabilized in nonpolar media is not as straightforward making their inorganic nanoparticle counterparts, since surfactants penetrate through the porous structures or dissolve secondary building units (SBUs) ligand-exchange linker modulator mechanisms. Herein, we report calixarenes stabilize UIO-66 nanoparticles effectively by remaining outside grains size exclusion, without pores becoming blocked, all while providing amphiphilicity permits...
Nanoporous polymers offer great promise in chemical capture and separations because of their versatility, scalability, robust nature. Here, we report a general methodology for one-pot, metal-free, room-temperature synthesis nanoporous by highly stable carbon–carbon bond formation. Three new polymers, namely, COP-177, COP-178, COP-179, are derived from widely available perfluoroarenes found to be superhydrophobic, microporous, against heat, acid, base, organic solvents. Nitrile, amine, ether...
Abstract Effective removal of excess greenhouse gas CO 2 necessitates new adsorbents that can overcome the shortcomings current capture methods. To achieve that, porous materials are often modified post‐synthetically with reactive amine functionalities but suffer from significant surface area losses. Herein, we report a successful post‐functionalization highly covalent organic polymer, COP‐130, without losing much porosity. By varying substituents, recorded remarkable increase in uptake and...
Abstract Chemical tuning of nanoporous, solid sorbents for ideal CO 2 binding requires unhindered amine functional groups on the pore walls. Although common soluble organics, post‐synthetic reduction nitriles in porous networks often fails due to insufficient and irreversible metal hydride penetration. In this study, a nanoporous network with pendant nitrile groups, microsphere morphology was synthesized large scale. The hollow microspheres were easily decorated primary amines through situ...
A new, high surface area, nanoporous polymer (COP-220) was synthesized using sustainable building blocks, namely, a food coloring dye (erythrosine B) and commercial alkyne. During the Sonogashira coupling, it is observed that Pd Cu ions triphenylphosphine ligands of catalyst get trapped inside pores. The remnant synthesis components were characterized in detail tested as new for Suzuki–Miyaura coupling reactions. COP-220 showed conversion yields comparable to homogeneous Pd(PPh3)2Cl2 with an...
Abstract Ordered mesoporous carbon materials offer robust network of organized pores for energy storage and catalysis applications, but suffer from time‐consuming intricate preparations hindering their widespread use. Here we report a new rapid synthetic route N‐doped ordered structure through preferential heating iron oxide nanoparticles by microwaves. A nanoporous covalent organic polymer is first formed in situ covering the hard templates assembled nanoparticles, paving way long‐range...