Unraveling the role of operating pressure in the rapid formation of Cu-BDC MOF via a microdroplet approach

• Transition of aerosol dynamics regime creates distinct droplet evaporation profiles. Properties MOF crystals can be modified by decreasing operating pressure. Gas adsorption data are evaluated for CO 2 enthalpy and selectivity. Dissociation solvent under low pressure increases formation open metal sites. A microdroplet-based spray process has been recently developed the synthesis metal–organic frameworks (MOFs) which features a short processing time scalable manner. In this process, atomized microdroplets MOFs precursor solution undergo well-controlled physiochemical transformations with each serving as microreactor. Droplet transformation is closely related to flow patterns system. conventional system operated at atmospheric (under continuum regime). By lowering pressure, transitioned free-molecular regime, where transport phenomena microdroplet become due discrete surrounding gas. It hypothesized that formed condition could have unique morphological structural features. Nevertheless, topic rarely investigated. This work studies copper 1,4-benzenedicarboxylate (Cu-BDC) changing regimes modulating Specifically, changes in crystal size, morphology, orientation, well surface oxidation state, observed Heat mass transfer calculations, accounting transition regimes, suggest these variations different rates microdroplets. Our study also suggests dissociation molecules from Cu-BDC sub-ambient sites lead strong binding affinity. illustrates substantially pressures offers many new opportunities controlled selective gas adsorption.