Figure 3. N2 adsorption-desorption isotherms and (inset) pore size distributions of the (a) MOF NPs and (b) pMOF MSs. CO2, CH4, and N2adsorption isotherms of the (c) MOF NPs and (d) pMOF MSs.
In order to show the universality of polymer embedding strategy, UiO-66,47 constructed by Zr6O4(OH)4 nodes and 1,4-dicarboxybenzene (BDC) linkers, was also applied in preparing pMOF MSs. The solvothermally synthesized UiO-66 crystals possessed octahedral structure, with particle sizes in the range of 150˗200 nm (Figure S4a). Similar to the pMOF MSs, the pUiO-66 MSs prepared by one-pot synthesis also displayed polycrystalline spherical structures with rough surface and diameters of 1˗2 μm (Figure S4b,c). The XRD patterns further verified the formation of UiO-66 crystals in pUiO-66 MSs (Figure S4d). The one-pot synthesis for preparation of polymer-embedded MOF MSs was versatile for various MOF materials.