Incorporation of Isopolyoxometalate into the Crystal and Membrane of ZIF-8

【摘要】 With the aim of designing and preparing the materials based on polyoxometalates（POMs） and the metal-organic frameworks（MOFs） toward desired applications, a facile approach was developed to incorporate the clusters of Mo₇O₂₄^6-（Mo₇）, a representative isopolyoxometalate, into the vacant cages of ZIF-8. Through the so-called strategy of building MOF bottles around the POM ships, the powdered crystals and crystalline membrane of Mo7@ZIF-8 were synthesized, respectively. The products were characterized by IR, PXRD, N₂ adsorption, and SEM. The Mo₇@ZIF-8 crystals could effectively adsorb malachite green（MG） from water, and the maximum adsorption capacity reached 1963 mg?g^-1. The Mo₇@ZIF-8 crystals could also be used for selectively adsorbing MG from the mixed dye solution containing MG and methyl orange（MO）. Moreover, the Mo₇@ZIF-8 membrane exhibited the proton conductivity of 9.5 × 10^-2 S?cm^-1 at 75 ℃ under 98% relative humidity.更多还原

【Abstract】 With the aim of designing and preparing the materials based on polyoxometalates（POMs） and the metal-organic frameworks（MOFs） toward desired applications, a facile approach was developed to incorporate the clusters of Mo₇O₂₄^6-（Mo₇）, a representative isopolyoxometalate, into the vacant cages of ZIF-8. Through the so-called strategy of building MOF bottles around the POM ships, the powdered crystals and crystalline membrane of Mo7@ZIF-8 were synthesized, respectively. The products were characterized by IR, PXRD, N₂ adsorption, and SEM. The Mo₇@ZIF-8 crystals could effectively adsorb malachite green（MG） from water, and the maximum adsorption capacity reached 1963 mg?g^-1. The Mo₇@ZIF-8 crystals could also be used for selectively adsorbing MG from the mixed dye solution containing MG and methyl orange（MO）. Moreover, the Mo₇@ZIF-8 membrane exhibited the proton conductivity of 9.5 × 10^-2 S?cm^-1 at 75 ℃ under 98% relative humidity.更多还原