Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 404, Issue -, Pages 14-20Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2015.12.015
Keywords
Silver; Polymer nanocomposites; Nickel ferrite; Magnetic nanoparticles; Antibacterial activity; Titanium dioxide
Funding
- Iranian Nanotechnology Council
- Institute of Biotechnology and Bioengineering
- Isfahan University of Technology (IUT) Research Council and Center of Excellency in Applied Nanotechnology
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We have described a facile fabrication of silver deposited on the TiO2, Poly Acrylonitrile Co Maleic Anhydride (PAMA) polymer and nickel ferrite composite (NiFe2O4/PAMA/Ag-TiO2) through a three-step procedure. A pre-synthesized NiFe2O4 was first coated with PAMA polymer and then Ag-TiO2 was deposited on the surface of PAMA polymer shell. After the characterization of this three-component composite by various techniques, such as FTIR, XRD, FESEM, BET, TEM and VSM, it was impregnated in standard antibiotic discs. The antibacterial activity of NiFe2O4/PAMA/Ag-TiO2 nanocomposite was investigated against some gram positive and gram negative bacteria by employing disc diffusion assay and then compared with that of naked NiFe2O4, NiFe2O4/Ag, AgNPs and NiFe2O4/PAMA. The results demonstrated that the AgNPs, when embedded in TiO2 and combined with NiFe2O4/PAMA, became an excellent antibacterial agent. The NiFe2O4/PAMA/Ag-TiO2 nanocomposite could be readily separated from water solution after the disinfection process by applying an external magnetic field. (C) 2015 Elsevier B.V. All rights reserved.
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