▎ 摘　　要

In this study, various weight ratios of titania (TiO2) and graphene oxide (GO) mixed powders were coated on the surface of microporous poly(vinylidene fluoride) (PVDF) membranes after the membranes were activated by argon plasma and immediately grafted with acrylic acid. Such composite membranes were first characterized by X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FTIR), field-emission scanning electron microscopy (FE-SEM), and water contact angle measurements. These composite membranes were then applied to remove phenol and m-nitrophenol in the single and binary systems under UV irradiation. Results showed that the presence of GO enhanced the efficiency of TiO2 photocatalysis due to its ability to minimize the agglomeration of TiO2 nanoparticles and the recombination rate of electron-hole pairs. In contrast to traditional suspended catalyst systems, the as-prepared composite membranes were proven to be more economic and efficient materials for the removal of organic pollutants. Finally, the intermediates produced during UV photocatalysis of single and binary phenol/m-nitrophenol using the composite membranes were detected and identified by UPLC (R)-QTof/MS, and the degradation pathways were proposed accordingly.