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.