Mechanical Alloying of Metal–Organic Frameworks

Abstract

The solvent‐free mechanical milling process for two distinct metal–organic framework (MOF) crystals induced the formation of a solid solution, which is not feasible by conventional solution‐based syntheses. X‐ray and STEM‐EDX studies revealed that performing mechanical milling under an Ar atmosphere promotes the high diffusivity of each metal ion in an amorphous solid matrix; the amorphous state turns into the porous crystalline structure by vapor exposure treatment to form a new phase of a MOF solid solution.

Solvent‐Free Mechanochemical Preparation of Hierarchically Porous Carbon for Supercapacitor and Oxygen Reduction Reaction

“…[35] Ball millingi sa blet o realizee ffective solvent-free mixing: mechanochemical forces generated during the process of ball milling could trigger the atomic rearrangement of the surfaceo ft he material to form an amorphous phase with high roughnessa nd ag ood number of dangling bonds, and therefore, allow external molecules to undergos pontaneousp hysi-and chemisorption on the newly formed, highly rough surface, leadingt oam arked increase in the surface/edge defects and heteroatom-containing functional groups. [36][37][38][39] Despite this, there have been few reports on the use of solvent-free ball milling in the preparationo fb iomass-derived carbon-based materials fore lectrochemical energya pplications.…”

Exploration of glassy state in Prussian blue analogues

“…S9). DSC of Cu[Fe]2/3'-g in a closed system did not provide any exothermic peak, suggesting that water vapour generated from the interstitial water in Cu[Fe]2/3-g is required to aid the recrystallization process due to its porous nature 30 . It is worth mentioning that thermal annealing alone is sufficient for dense CP glasses 26,27 .…”

“…Encouraged by the DSC results and vapour assisted recrystallization in some MOF/CP glasses, we attempted to reconstruct the crystalline framework from the glassy state 20,26,30,31 . The Cu[Fe]2/3-g was exposed to humid air (85 RH%) at 80 ˚C for 72 h. Again, the colour alters to garnet red (Fig.…”

Efficient photocatalytic degradation of gaseous acetaldehyde over ground Rh–Sb co-doped SrTiO3 under visible light irradiation

“…As is well known, the number of crystal defects increases with increasing milling time. 54,55 Crystal defects oen work as recombination centers of excited electrons and holes, decreasing the photocatalytic performance. Therefore, grinding for 60 min achieved higher photocatalytic performance of the STO:Rh than grinding for 90 min.…”