Preparation of a MOF membrane with 3-aminopropyltriethoxysilane as covalent linker for xylene isomers separation

In this study, a continuous-growth Zn2(BDC)2DABCO membrane was synthesized on the NH2-terminated SAMs modified porous SiO2 substrates by using the MOF nanocrystals as seed, which was prepared by an easily scalable method with acetic acid as capping reagent. The seed crystals and membranes were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The thickness of the membranes can be varied by adjusting the repetitions of growing process. The xylene isomer mixture separation performance tests of MOF membrane were taken out.

A continuous-growth MOF membrane was synthesized on the NH2-terminated SAMs modified substrates by using the MOF nanocrystals as seed, which was prepared by an easily scalable method with acetic acid as capping reagent. The xylene isomer mixture separation tests of MOF membranes were taken out.Figure optionsDownload as PowerPoint slideHighlights
► The substrate was modified with SAMs to enhance the force between MOF and supporter.
► Acetic acid was added to the system as a capping reagent to compose MOF nanocrystals.
► The MOF membranes were used to the separation of xylene isomer mixtures.