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    Selective ion removal and antibacterial activity of silver-doped multi-walled carbon nanotube/polyphenylsulfone nanocomposite membranes

    Year: 2019

    Journal: Mater. Chem. Phys., Volume 233, MAY 15, page 102–112

    Authors: Shukla, Arun Kumar; Alam, Javed; Ansari, Mohammad Azam; Alhoshan, Mansour; Alam, Manawwer; Kaushik, Ajeet

    Organizations: Deanship of Scientific Research at King Saud UniversityKing Saud University [RG-1439-85]; Deanship of Scientific Research; King Saud UniversityKing Saud University

    Keywords: Nanocomposite membrane; Silver nanoparticles; Multiwalled carbon nanotubes; Doping; Selective ion removal; Antibacterial activity

    This study focuses on selective ion removal and antibacterial applications of silver-doped multiwalled carbon nanotube (MWCNT)/polyphenylsulfone (PPSU) nanocomposite membranes. The prepared Ag-doped MWCNTs are characterized according to their particle size distribution and specific surface area. Further, they are examined using transmission electron microscopy and several spectroscopic techniques; their morphology, topography, surface charge, porosity, and contact angles are reported. A performance evaluation demonstrates that the Ag-MWCNT/PPSU nanocomposite membrane exhibits unique properties and achieves optimal performance. The nanocomposite membrane exhibits significantly improved selective removal of Na2HAsO4, Na2Cr2O7, Na2SO4, NaCl, MgSO4, and MgCl2 ions from aqueous solutions compared to the pristine PPSU membrane. The antibacterial activity is evaluated using Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus bacteria, and is found to be enhanced by the presence of Ag-MWCNTs, which endow the nanocomposite membrane with excellent antibacterial activity. Hence, the developed Ag-MWCNT/PPSU nano composite membrane with improved ion removal performance and antibacterial activity could be suitable for use in potable water applications.
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