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Electrospun Ag-decorated reduced GO-graft-chitosan composite nanofibers with visible light photocatalytic activity for antibacterial performance

Asgari, S ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1016/j.chemosphere.2022.134436
  3. Publisher: Elsevier Ltd , 2022
  4. Abstract:
  5. The treatment of water contaminated by bacteria is becoming a necessity. The nanomaterials possessing both intrinsic antibacterial properties and photocatalytic activity are excellent candidates for water disinfection. The powdered form of nanomaterials can be aggregated while embedding the nanomaterials into the NFs can overcome the limitation and enhance the photocatalytic activity and transition from UV-light to visiblelight. Here, graphene oxide (GO) was synthesized, grafted to chitosan, and decorated with silver nanoparticles (Ag NPs) to produce Ag-decorated reduced GO-graft-Chitosan (AGC) NPs. The blends of polyacrylonitrile (PAN) and AGC NPs were prepared in various concentrations of 0.5 wt%, 1.0 wt%, 5.0 wt%, and 10.0 wt% and used to fabricate the electrospun composite NFs. FTIR/ATR, UV–Vis, Raman, XRD, and SEM/EDAX analyses confirmed the successful preparation of the NPs and NFs. The cytotoxicity and antibacterial activity of the composite NFs were received in the order of composite NFs 10.0 wt%˃ 5.0 wt%˃ 1.0 wt%˃ 0.5 wt% in both conditions with/without light irradiation. Their cytotoxicity and antibacterial activity were more under light irradiation compared to the dark. The composite NFs (5.0 wt%) were distinguished as the optimum NFs with cell viability of 80% within 24 h and 60% within 48 h on L929 cells and inhibition zone diameter (IZD) of 12 mm for E. coli and 13 mm for S. aureus after 24 h under the light irradiation. The optimum composite NFs showed thermal stability up to 180 °C and tensile strength of 1.11 MPa with 21.71% elongation at break. © 2022 Elsevier Ltd
  6. Keywords:
  7. Antibacterial performance ; Chitosan ; Electrospun composite nanofibers ; Graphene oxide ; Visible light photocatalytic activity ; Chitosan ; Disinfection ; Grafting (chemical) ; Graphene ; Irradiation ; Photocatalytic activity ; Silver nanoparticles ; Synthesis (chemical) ; Tensile strength ; Water treatment ; Anti-bacterial activity ; Composite nanofibers ; Electrospun composite ; Electrospun composite nanofiber ; Electrospuns ; Light irradiations ; Photocatalytic activities ; Reduced graphene oxides ; Visible-light photocatalytic activities ; Cefotaxime ; Nanocomposite ; Nanofiber ; polyacrylonitrile ; Silver nanoparticle ; Vancomycin ; Antiinfective agent ; Metal nanoparticle ; Composite ; Inhibition ; Nanoparticle ; Antibacterial activity ; Cell viability ; Concentration (parameter) ; Controlled study ; Cytotoxicity ; Electrospinning ; Embedding ; Energy dispersive X ray spectroscopy ; Escherichia coli ; Fourier transform infrared spectroscopy ; NCTC clone 929 cell line ; Photocatalysis ; Raman spectrometry ; Scanning electron microscopy ; Synthesis ; Thermostability ; Ultraviolet radiation ; Ultraviolet visible spectroscopy ; X ray diffraction ; Zone of inhibition ; Croatia ; Vis ; Anti-Bacterial Agents ; Graphite ; Light ; Nanofibers ; Silver ; Staphylococcus aureus ; Water ; Metal nanoparticles
  8. Source: Chemosphere ; Volume 299 , 2022 ; 00456535 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0045653522009298