Preparation of Polystyrene Nanofiber-Supported Metal-Organic Framework with Formaldehyde Adsorption Properties

Air quality is particularly important to public health. Therefore, effective purification and filtration of indoor and outdoor air has become an urgent need. Metal-organic frameworks (MOFs) have been used in the field of gas adsorption because of their superior specific surface area and porosity. However, MOFs are generally presented in powder form, which is not conducive to practical application. In this study, to expand the practical application of MOFs, polystyrene (PS) was used as raw material to prepare PS/Co(AC)2 nanofiber membrane as the matrix material through electrostatic spinning. By soaking method, Co2+ in the nanofiber was coordinated with 2-methylimidazole (2MI) ligand in the soaking solution to make Zeolitic imidazolate framework-67 (ZIF-67) grow on the nanofiber in situ, and ZIF-67@PS composite membrane was prepared. The results of this study showed that the formaldehyde adsorption and filtration properties of the ZIF-67@PS nanofiber membrane were significantly better than those of pure PS nanofiber membrane.