Nanoporous carbons possessing high surface area and narrow pore size distribution are among the most important classes of porous materials that practically utilized in industries. Recently, several metal-organic frameworks (MOFs) or coordination polymers (PCPs) have been demonstrated as promising precursors to create functional nanoporous carbons. In this highlight article, we briefly review recent progress preparation these novel MOF-derived Some applications energy environment-related...

Nanoporous carbons with high surface area are achieved through direct carbonization of a commercially available zeolitic imidazolate framework (ZIF-8) without any additional carbon sources. The resultant nanoporous exhibit electrochemical capacitances in an acidic aqueous electrolyte.

Carbon management by a means of CO2 capture from large stationary sources such as coal-fired power plants or ambient air is significant global issue. In the context steam-stripping regeneration process for solid adsorbents, new adsorbent materials robust enough direct contact with low temperature steam are needed. Here, mesoporous γ-alumina-supported poly(ethyleneimine) composite prepared and evaluated effective using dilute streams simulated flue gas (10% CO2) ultradilute (400 ppm CO2)....

Oxide supports functionalized with amine moieties have been used for decades as catalysts and chromatographic media. Owing to the recognized impact of atmospheric CO2 on global climate change, study use amine-oxide hybrid materials sorbents has exploded in past decade. While majority work concerned separation from dilute mixtures such flue gas coal-fired power plants, it by us others that supported are also perhaps uniquely suited extract ultradilute mixtures, ambient air. As unique, low...

Abstract Nanoporous carbon–cobalt‐oxide hybrid materials are prepared by a simple, two‐step, thermal conversion of cobalt‐based metal–organic framework (zeolitic imidazolate framework‐9, ZIF‐9). ZIF‐9 is carbonized in an inert atmosphere to form nanoporous carbon–metallic‐cobalt materials, followed the subsequent oxidation air, yielding hybrids. The resulting evaluated as electrocatalysts for oxygen‐reduction reaction (ORR) and oxygen‐evolution (OER) KOH electrolyte solution. exhibit similar...

Low-molecular-weight poly(allylamine) is prepared via free-radical polymerization, and the resulting polymer impregnated into mesocellular silica foams at different amine loadings. The poly(allylamine)–silica composites are demonstrated as effective adsorbents for extraction of carbon dioxide from dilute (simulated flue gas) ultradilute ambient air) gas streams. composite shown to have comparable adsorption capacities more-conventional poly(ethyleneimine)–silica adsorbents. Potential...

We prepared nanoporous carbon (NC) particles of approximately 50-nm diameter by direct carbonization metal–organic frameworks (MOFs). The obtained MOF-derived NC (MOF-NC) exhibit very high biocompatibility and, hence, are promising as intracellular drug delivery carriers.

Organic structure-directing agents (OSDAs) have been widely used for the synthesis of zeolites. In most cases, OSDAs are occluded in zeolites as an isolated cation or molecule geometrically fitted within zeolite cavities. This is not case beta synthesized by using tetraethylammonium (TEA+) OSDA, which a cluster/aggregate ca. six TEA+ cations intact cavity (i.e., channel intersection) beta. The structure direction such nontypical, clustered mode has remained elusive. Here, was hydrothermally...

Organic structure-directing agent (OSDA)-free synthesis of zeolite beta is a subject both scientific and industrial interest. Herein, we report comprehensive investigation into the effects various parameters on seed-assisted crystallization in absence OSDA. The behavior "OSDA-free beta" strongly governed by chemical composition starting Na(+)-aluminosilicate gel as well Si/Al ratios calcined seed crystals, which are prepared using tetraethylammonium hydroxide (TEAOH). Furthermore, OSDA-free...

Characteristics of zeolite formation, such as being kinetically slow and thermodynamically metastable, are the main bottlenecks that obstruct a fast synthesis. We present an ultrafast route, first its kind, to synthesize high-silica SSZ-13 in 10 min, instead several days usually required. Fast heating tubular reactor helps avoid thermal lag, synergistic effect addition seed, choice proper aluminum source, employment high temperature prompted crystallization. Thanks ultra-short period...

Make intergrowth, not war! Hierarchically organized MFI zeolites with micro-, meso-, and macroporosity (see scheme) in one structure were made by sequential intergrowth using a simple organic structure-directing agent (OSDA) without meso- or macroporogens. The use of an OSDA that imperfectly fits the zeolite framework generated very thin plates 90° rotational intergrowth.

A novel hierarchically porous, hyper-cross-linked siloxane-organic hybrid (PSN-5) has been synthesized by Friedel-Crafts self-condensation of benzyl chloride-terminated double-four-ring cubic siloxane cages as a singular molecular precursor. Simultaneous polymerization the organic functional groups and destruction during synthesis yielded PSN-5, which an ultrahigh BET surface area (∼2500 m(2) g(-1)) large pore volume (∼3.3 cm(3) that to our knowledge are highest values reported for...

Amine/oxide hybrid carbon dioxide adsorbents prepared via impregnation of low molecular weight polymeric amines into porous oxide supports are among the most promising solid developed for postcombustion CO2 capture or extraction from ambient air. The oxidative stability by poly(ethylenimine) (PEI) poly(allylamine) (PAA) mesoporous γ-alumina under humid oxidation conditions is evaluated in this work. PEI-based adsorbents, which contain primary, secondary, and tertiary amines, shown to degrade...

The contents and locations of Al in the zeolite frameworks are one key factors determining physicochemical properties zeolites. Systematic evaluation characteristics zeolites with a wide variety framework topologies, range Si/Al ratios, various is great significance, but very challenging due to limitation realizable ranges as well limited information on obtained from current analytical techniques. Here, we report systematic analysis energetics aluminosilicate 209 existing topologies at...

A series of hierarchical three-dimensional (3D) manganese-cobalt benzenetricarboxylic acid (Mn-Co BTC) metal–organic frameworks (MOFs) with controllable sub-units and interior architectures have been synthesized at room temperature without templates, etchants, or high-pressure conditions. The assembling the 3D Mn-Co BTC MOFs can be controlled by tuning Mn/Co ratio, higher Mn content favoring one-dimensional (1D) sub-units, while Co favors two-dimensional (2D) sub-units. hollow spheres...

Novel pure silica sodalite with hollow sodalite-cages has been synthesized for the first time by topotactic conversion of layered silicate (RUB-15) precursor. This success achieved stepwise syntheses from monomers, through clusters and layers, to microporous crystals. The pretreatment small carboxylic acids before is a crucial step. obtained possesses accessible micropores, as confirmed physical adsorption hydrogen molecules. plate-like would be very promising fillers in mixed-matrix...

Peptides capture CO2: Poly(L-lysine) brush–mesoporous silica hybrids were prepared and evaluated as biomolecule-based CO2 adsorbents using simulated flue gas (10 % CO2) ambient air (400 ppm CO2). Compared to representative amine-based adsorbents, the show higher or comparable capacity outperform other materials in terms of amine efficiency. The are suggested be promising new for capture, especially, from ultra-dilute streams.

Abstract Sonogashira cross‐coupling of bromophenylethenyl‐terminated cubic, double four‐ring, siloxane cages with di‐/triethynyl compounds results in microporous poly(ethynylene aryleneethenylene silsesquioxane) networks, simply termed as polyorganosiloxane networks (PSNs). In comparison porous organic polymers reported previously, these PSNs show relatively high surface area and comparable thermal stability. Their apparent BET specific areas vary the range 850–1040 m 2 g −1 depending on...

Abstract We report the most siliceous FAU‐type zeolite, HOU‐3, prepared via a one‐step organic‐free synthesis route. Computational studies indicate that it is thermodynamically feasible to synthesize FAU with SAR=2–7, though kinetic factors seemingly impose more restricted upper limit for HOU‐3 (SAR≈3). Our findings suggest slow rate of crystallization and/or low concentration Na + ions in growth mixtures facilitate Si incorporation into framework. Interestingly, Q 4 (nAl) speciation...

Interzeolite conversion from <bold>FAU</bold> to <bold>CHA</bold> results in massive atomic rearrangements their common structural motif form a stable configuration.

Abstract The Al location in zeolites can have massive influences on the zeolite properties because it directly correlates with cationic active sites. Herein, synthesis of IFR controlled distribution at different tetrahedral sites (T sites) is reported. computational calculations suggest that organic structure‐directing agents (OSDAs) used for alter energetically favorable T Al. Zeolite products synthesized under identical conditions but OSDAs are found to altered fractions accordance...