The objective of this work is to develop a new class of nanocomposite ultrafiltration (UF) membranes with excellent solute rejection rate and superior water flux using zeolitic imidazolate framework-8 (ZIF-8) and multi-walled carbon nanotubes (MWCNTs). The effect of ZIF-8 and MWCNTs loadings on the properties of polyvinyldifluoride (PVDF)-based membrane were investigated by introducing respecti...

The flexibility and structure transition behaviour of ZIF-8 in a series of samples with different particle size has been studied using a combination of high-resolution N2 gas adsorption isotherms and, for the first time, a broad in situ PXRD and Rietveld analysis. During the stepped adsorption process, large particles showed a narrow adsorption/desorption pressure range with a shorter equilibri...

We determine the nonlinear mechanical behavior of a prototypical zeolitic imidazolate framework (ZIF-8) along two modes of mechanical failure in response to tensile and shear forces using first-principles simulations. Our generalized stacking fault energy surface reveals an intrinsic stacking fault of surprisingly low energy comparable to that in copper, though the energy barrier associated wit...

While metal-organic frameworks (MOFs) exhibit excellent potential in extensive catalytic reactions, predictably synthesizing MOF nanoparticles (NPs) with desired and uniform sizes remains a great challenge. Here, mild efficient ultrasound-assisted synthetic method has been developed to prepare ZIF-8, ZIF-67, Co/ZIF-8 well-designed particle size morphology. By adjusting the cobalt content doped ...

Recently two quite different types of "nano-containers" have been recognized as attractive potential drug carriers; these are wormlike filamenteous micelles ("filomicelles") on the one hand and metal organic frameworks on the other hand. In this work we combine these two concepts. We report for the first time the manufacturing of metal organic framework nanotubes with a hollow core. These worm-...

The CO2 capture performance of four zeolitic imidazolate frameworks (ZIFs), ZIF-10, ZIF-71, ZIF-68 and ZIF-69, was investigated in the presence of SO2 using molecular simulations. Our results show that SO2 is preferentially adsorbed over CO2. However, it also shows a cooperative effect on CO2 adsorption. In ZIF-10 and ZIF-71, the SO2 presence was found to have almost no effect on CO2 adsorption...

A series of mixed-linker Zeolitic Imidazolate Framework(ZIF)-7–8s constructed from different amounts benzimidazolate (bIm) and 2-methylimidazolate (mIm) linkers were synthesized in this study. We demonstrated that by carefully controlling the ratios between bIm mIm linkers, particle morphology pore size ZIF-7–8 can be tailored to selectively adsorb CO2 or SF6 with significantly enhanced uptake ...

Adhesion between fillers and a polymeric matrix is an essential characteristic for mixed-matrix membranes molecular separation to avoid defects cavities that would decrease selectivity. We demonstrate here how solution rheology can be excellent tool identity polymer–filler pairs with strong interaction. The investigated system was polytriazole without hydroxyl functionalization (PTA-OH PTA) ZIF...

• Defect-free ZIF-8/GO/PIM-1 thin-film nanocomposite (TFN) membranes were fabricated. 2D ZIF/GO was produced by in situ growth of ZIF-8 on GO sheets as a continuous, uniform and thin layer. ZIF-8/GO composite results high dispersity compatibility ZG within PIM-1. PIM-1 infiltration into PVDF substrate avoided water pre-impregnation. TFN display PSI (228 kg m −2 h −1 ). In this work, film super-...