Super effective hydrogenation and deoxygenation are achieved by a synergistic approach using polyoxometalate and suspended nano-catalyst particles.

No abstract

No abstract

Zirconium-based metal–organic frameworks (MOFs) have attracted interest due to their chemical and thermal stabilities and structural tunability. In this work, we demonstrate the tuning of the wettability of a UiO-66 structure via defect-engineering for efficient oil/water separation. UiO-66 crystals with controlled levels of missing-linker defects were synthesized using a modulation approach. As a result, the hydrophilicity of the defect-engineered UiO-66 (d-UiO-66) can be varied. In addition, a thin layer of hydrophilic d-UiO-66 was successfully fabricated on a series of stainless steel meshes (d-UiO-66@mesh), which exhibited excellent superhydrophilic and underwater superoleophobic properties and displayed interesting separation performance for various oil/water mixtures.

A mixed linker strategy has led to the discovery of the new metal−organic framework material, GT-18 (GT = Georgia Tech), which has no open metal sites and a chiral structure. The material includes benzotriazole (BTA) and benzimidazole (BIM) linkers. Among multiple synthesis ratios that were tested, a BTA/BIM mole ratio of 4:1 gives a material with diffusion selectivity toward ethylene over ethane. This ratio yields the largest member ring (10 MR vs 6 MR) compared to that synthesized at low mixed linker ratios (ZIF-7 like structures) and with only BIM linkers (a 2D [Zn(BTA)2] n structure), while maintaining a narrow, but flexible, aperture size of ∼3 Å. The work demonstrates tunable sorption properties, topologies, and pore shapes, in which the selectivity for an important ethylene/ethane separation is achieved via diffusion selectivity.