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September 2016 - November 2016
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Publications (16)
Metal-organic frameworks (MOFs) are a class of porous materials that are comprised of metal ion-containing nodes linked by multi-dentate organic ligand bridges principally through coordination bonding. Over the last few decades, MOFs have been studied widely as CO2 adsorbents. CO2 adsorption in MOFs can be enhanced by tuning their physicochemical p...
A nitrogen-rich pillar-layered metal organic framework, Co(Imda)(4,4′-bpy), comprising cobalt(II) clusters interconnected by imidazole-4,5-dicarboxylic acid and 4,4′-bipyridyl groups was synthesized, and characterized by powder X-ray diffraction, N2 adsorption–desorption measurements, thermogravimetric analysis, and scanning electron microscopy. Th...
X-type zeolite with mesoporosity (Meso-13X) was prepared by using dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride as a mesopore-generating agent, and then modified with polyethylenimine (PEI) through a physical impregnation method to form a hybrid material (Meso-13X-PEI). Meso-13X with and without PEI was characterized by X-ray powder...
The chromium terephthalate metal–organic framework, MIL-101 (MIL, Matérial Institut Lavoisier), is comprised of trimeric chromium(III) octahedral clusters interconnected by 1,4-benzenedicarboxylates, resulting in a highly porous 3-dimentional structure. The large pores (29 and 34 Å) and high BET surface area (>3000 m2 g−1) with a huge cell volume (...
A series of CaO samples were prepared and tested as a sorbent for global-warming CO2 gas by measuring their CO2 capture capacities at 700 °C using a TGA unit. It is demonstrated that average pore size in CaO sorbents plays the governing role in deciding sorbent CO2 capture capacity, and that average pore size overrides the contributions of surface...
A nitrogen-rich carbon with a hierarchical micro-mesopore structure was obtained through pyrolysis of a porous polymer prepared from terephthalaldehyde and melamine, and then investigated for CO2 capture. This nitrogen-rich porous carbon exhibited a CO2 uptake of 141mg/g at 25°C, 1atm, which is one of the highest CO2 capture capacities among carbon...
Zeolite-like metal organic framework (ZMOF) materials having rho and sod topologies were experimentally investigated as CO2 adsorbents for the first time. As-prepared ZMOF materials showed reasonably high CO2 adsorption capacities (ca. 51 and 53mg/gadsorbent for rho-and sod-ZMOF, respectively) and high CO2/N2 selectivity (>20) at 298K and 1bar. The...
Mesoporous alumina (MA) having high surface area (812 m(2)/g) and large pore volume (0.83 cm(3)/g) with a narrow pore size distribution was prepared by a simple sol-gel process. The as-prepared MA was characterized by XRD, N-2 adsorption-desorption isotherms, and transmission electron microscopy (TEM). The CO2 adsorption performance of MA was teste...
A series of HMS (hexagonal mesoporous silica) materials having different textural mesoporosities was synthesized using dodecylamine as a structure directing agent, which were employed as a host for supporting PEI (polyethylenimine) (PEI/HMS) as a CO2 capturing agent. The textural properties of the prepared materials were examined by XRD, N2 adsorpt...
A supernatant solution of silicate species extracted from bottom ash in a power plant was used to prepare a mesoporous silica
by the synthesis protocol of SBA-15. XRD, N2 adsorption-desorption, and TEM confirmed a disordered mesopore structure. The pore volume and average pore size of the product
were significantly larger than SBA-15 prepared using...
Two different kinds of mesoporous alumina samples were prepared using aluminum tri-sec-butoxide in the presence of either cetyltrimethylammonium bromide (MA-1) or stearic acid (MA-2) as a structure-directing agent, and tested for adsorptive removal of fluoride in water. Both materials contain a wormhole-like mesopore structure, but exhibited differ...
A polyethylenimine-impregnated hierarchical silica monolith exhibited significantly higher CO(2) capturing capacity than other silica-supported amine sorbents, and produced a reversible and durable sorption performance.
