Preparation of zeolitic imidazolate frameworks-8/modified polyacrylonitrile electrospun nanofibers for efficient removal of malachite green from water

A simple in-situ growth method was presented to synthesize zeolitic imidazolate framework-8 (ZIF-8), one of the most common metal-organic frameworks (MOFs) crystals, onto a carboxymethylated polyacrylonitrile acorns pun nanofibers (PAN-COOH NFs). The synthesized ZIF-8/PAN-COOH NFs were characterized by field-emission scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), X-ray powder diffraction (XRD), and Fourier-transform infrared (FTIR) spectroscopy. The characterization results confirmed that the ZIF-8 particles were successfully loaded on the surface of the PAN-COOH NFs. The ability of ZIF-8/PAN-COOH NFs to remove malachite green (MG), a model organic dye, from wastewater was evaluated to examine the potential of this novel material as an adsorbent. The adsorption to MG was consistent with the pseudo - second - order kinetic equation, and the adsorption process was expressed by the Langmuir isotherm model. The maximum adsorption capacity for MC NV as examined as 3 604 mg center dot g(-1). It is noteworthy that the ZIF-8/PAN-COOH NFs could be easily separated from the dye solution and regenerated through a simple washing process for recycling.