Preparation Of MoS₂/PANI/PAN@BiFeO₃ Nanofiber Membranes And Its Treatment Of TCH/MO And Bacterial Inhibition Properties

In this paper,a novel Mo S₂/polyaniline（PANI）/polyacrylonitrile（PAN）@Bi Fe O₃bilayer hollow nanofiber membrane（PPBM-H）was successfully synthesized by coaxial electrospinning technique.Bi Fe O₃ nanoparticles（NPs）and Mo S₂ nanosheets（NSs）were loaded on the middle and outer layers of the PANI/PAN composites,respectively,which construct a type II heterojunction with spatially separated microtopography in PPBM-H,thus effectively improve the charge separation in photocatalysis.Moreover,the hollow structure of nanofibers helps to promote the mass transfer efficiency in sewage treatment,and vast amine/imine groups exposed on PANI surface will be conducive to the adsorption of PPBM-H for pollutants.Also,Bi Fe O₃ NPs can not only act as the Fenton catalysts to activate H₂O₂ in situ generated from Bi Fe O₃/Mo S₂,but also work as the piezoelectric materials to produce the polarization under ultrasonic excitation,which can further enhance the efficiency of electron/hole separation and transfer,and induce the generation of active free radicals.Owing to its wonderful self-cleaning effect,the obtained PPBM-H has good mechanical strength（2.95 Mpa）,hydrophilicity（11.6°）,water flux（1248 L/m²/h）,BSA rejection（98.8%）,and exhibits distinguished photocatalytic filtration efficiencies for pollutants（99.5%of tetracycline hydrochloride（TCH）and 99.9%of methyl orange（MO）are removed within 60 min）,piezo-photocatalysis（99.2%of TCH is removed within 2 h）,antibacterial performance for Escherichia coli（E.coli）（100%inactivation within 60 min）,and excellent cyclic stability.