Herein, we demonstrate a synergistic approach with radiofrequency plasma to synthesize ammonia in the presence of Ni-MOF-74 as catalyst. The Ni-MOF displayed higher yields compared pure Ni metal. Specifically, high 0.23 g-NH3 (g-catalyst·kWh)−1 and energy cost 265 MJ mol–1 over were observed. enhanced catalytic activity was attributed pores, which improved mass transfer guest product molecules during reaction, open metal sites, lower surface hydrogen recombination. Furthermore, yield our...

Herein, we demonstrate that a prototypical type of metal organic framework, zeolitic imidazolate framework-8 (ZIF-8), in membrane form, can effectively separate Kr/Xe gas mixtures at industrially relevant compositions. The best membranes separated with average Kr permeances as high 1.5 × 10–8 ± 0.2 mol/m2 s Pa and separation selectivities 14.2 1.9 for molar feed compositions corresponding to ratio encountered typically air. Molecular sieving, competitive adsorption, differences diffusivities...

Separation of xenon and krypton is highly relevant to several applications such as spent nuclear fuel processing. Molecular simulation has been extensively used understand the Kr/Xe separation performance nanoporous materials for adsorption-based technologies but less frequently membrane-based technologies. Motivated by recent experimental reports on krypton-selective membranes, herein, we present grand canonical Monte Carlo biased molecular dynamics simulations (using adaptive biasing...

Herein we demonstrate the separation ability of AlPO-18 membranes for Kr/Xe gas mixtures. separated mixtures with average selectivity 6.4 and unprecedented high Kr permeance 1.6 × 10–7 mol/m2·s·Pa. Diffusivity difference between Xe was identified as dominant mechanism. We compared performance versus two other types microporous crystalline membranes, namely, SAPO-34 ZIF-8. displayed best overall performance, while highest permeances. key factors affecting both permeance. For these three...

A microfabricated device has been developed for the selective detection of lead in water. It is based on use a and sensitive fluorescent molecular sensor (Calix-DANS4) which contains calix[4]arene bearing four dansyl groups. The microchip-based Y-shape microchannel equipped with passive mixer moulded glass substrate. An optimization microcircuit length performed order to have full complexation Calix-DANS4. by using configuration sensing molecules are excited two optical fibres, each one...

Continuous ZIF-8 membranes effectively separated air/Xe gas mixtures. These showed air permeances as high 3.94 × 10-8 mol m-2 s-1 Pa-1 and separation selectivities 12.4 for an molar feed composition of 9 : 1. from Xe via molecular sieving, preferential adsorption, diffusivity differences.

Abstract As large numbers of people are suffering from gout, an accurate, rapid, and sensitive method for the detection gout biomarker, uric acid, is important its effective control, diagnosis, therapy. Although colorimetric methods based on uricase have been considered, they still limitations as produce toxic H 2 O expensive not stable. Here, a novel uricase‐free was developed selective acid light‐induced oxidase‐mimicking activity new photosensitized covalent organic framework (COF)...

Herein we followed the structural evolution of a prototypical type porous organic cage, CC3, as function synthesis time. Three distinctive crystal formation stages were identified: at short times, rapid growth stage in which amorphous agglomerates transformed into larger irregular particles was observed. At intermediate decrease size over time observed presumably due to fragmentation, redissolution, and/or homogeneous nucleation. Finally, longer regrowth process coalesced through Ostwald...

Abstract Ionic liquids as green solvents have been paid extensive attention in recent years. However, mostly it is cost and time‐consuming to measure their properties. Thus, theorical methods, especially ultrafast chemoinformatics methods were introduced into these studies. Instead of abstract complex models some QSPR studies, this study, the 2D structural features related toxicity ionic discussed at first, then corresponding intuitive meaningful descriptors suggested construct quantitative...

SAPO-34 zeolite crystals were grown on 5A beads, characterized, and then used to produce furfural from xylose 5-hydroxymethylfurfural (HMF) glucose. The SAPO-34/5A bead catalysts resulted in moderate HMF yields of 45% 20% glucose (463 K; 3 h) easier recover than the powder catalyst. At 463 K, beads more selective 0.02 M sulfuric acid for producing and, unlike system, no levulinic was formed. had significant loss activity after three rounds recycle when water washed or heated overnight...

Abstract Quaternary ammonium salts were synthesized from and dialkyl carbonates over imidazolium ionic liquid catalysts. The reaction gave almost stoichiometric amounts of the quaternary for halides nitrates. It was found that electron‐donating property alkyl moieties cations, electrophilic nature group carbonate, acidity acid anion salt corresponds to, steric hindrance are key factors influence yields salts. Strong groups on nitrogen atom salt, electron‐withdrawing methylene carbon weaker...