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    Antibacterial PES-CA-Ag2O nanocomposite supported Cu nanoparticles membrane toward ultrafiltration, BSA rejection and reduction of nitrophenol

    Year: 2017

    Journal: J. Mol. Liq., Volume 230, MAR, page 616–624

    Authors: Gul, Saima; Rehan, Zulfiqar Ahmad; Khan, Shahid Ali; Akhtar, Kalsoom; Khan, Murad Ali; Khan, M. I.; Rashid, Muhammad Imtiaz; Asiri, Abdullah M.; Khan, Sher Bahadar

    Keywords: Cellulose acetate; Polyethersulfone; p-Nitrophenol; Ag2O; Copper nanopartides; Antibacterial activity; BSA rejection; Water permeability

    Nanocomposite membrane (PES-CA-Ag2O) with disinfection properties were developed by inclusion of silver oxide (Ag2O) in polyethersulfone (PES) and cellulose acetate (CA) polymers. Pure PES, CA, PES-CA and nanocomposite membranes were prepared by casting method. Further copper (Cu) nanoparticles were grown on the surface of PES-CA membrane (Cu-O@PES-CA) and nanocomposite membrane (Cu-O@PES-CA-Ag2O). Structures, compositions and morphologies of all the prepared membranes were confirmed by XRD, FTIR and FESEM techniques. Various properties of PES, CA, PES-CA, PES-CA-Ag2O, Cu-O@PES-CA and Cu-O@PES-CA-Ag2O were comprehensively studied including water permeation flux, porosity, bovine serum albumin (BSA) rejection, mechanical properties and contact angle measurement. Permeability of the PES-CA and PES-CA-Ag2O was around 63.3 and 92.88 L-h(-1). m(-2) bar(-1) while after growing Cu nanoparticles on the surface of PES-CA and PES-CA-Ag2O, the water permeability reached 72.5 and 100.2 L.h(-1).m(-2) bar-1. PES-CA-Ag2O and Cu-O@PES-CA-Ag2O also showed reasonable porosity. PES-CA-Ag2O and Cu-O@PES-CA-Ag2O displayed a marked increase in BSA rejection (88.8 and 89.5, respectively) and the contact angle decreased from 73 degrees to 63.5 degrees and 60.25 degrees, respectively proving the hydrophilic nature of the synthesized materials. Removal of toxic p-nitrophenol from aqueous media is challenging task due to its sorption fouling and tough degradation at lower concentrations. Catalytic reduction capacity of the Cu-O@PES-CA and Cu-O@PES-CA-Ag2O membranes for different substituted phenols were studied comprehensively Conclusively, unprecedented catalytic potential was observed. Finally, in vitro anti-bacterial activity of the synthesized materials was also investigated against E. coll with promising potential. (C) 2016 Elsevier B.V. All rights reserved.
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