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Synthesis of cellulose acetate/chitosan/SWCNT/Fe3O4/TiO2 composite nanofibers for the removal of Cr(VI), As(V), Methylene blue and Congo red from aqueous solutions

ZabihiSahebi, A ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ijbiomac.2019.08.214
  3. Publisher: Elsevier B.V , 2019
  4. Abstract:
  5. The potential of electrospun cellulose acetate/chitosan/single walled carbon nanotubes/ferrite/titanium dioxide (CA/chitosan/SWCNT/Fe3O4/TiO2) nanofibers was investigated for the removal of Cr(VI), As(V), Methylene blue and Congo red from aqueous solutions via the adsorption and photocatalytic reduction processes. The properties of synthesized SWCNT/Fe3O4/TiO2 and fibers were characterized using TEM, SEM, FTIR, XRD, TGA and BET analysis. In adsorption process, the influence of adsorbent type including SWCNT to Fe3O4 ratio, TiO2 to SWCNT/Fe3O4 ratio and SWCNT/Fe3O4/TiO2 concentration as well as the adsorption parameters including pH, contact time, and initial concentration of adsorbates on the Cr(VI), As(V), Methylene blue and Congo red adsorption in a batch mode was investigated. The reusability of nanofibers was also investigated for five adsorption-desorption cycles. The photocatalytic reduction of Cr(VI), As(V), Methylene blue and Congo red was also investigated using various nanofibrous catalysts. The obtained results indicated that the removal of Cr(VI) and As(V) using CA/chitosan/SWCNT/Fe3O4/TiO2 nanofibrous adsorbent via adsorption process could be preferred for the lower concentrations of metal ions. The photocatalytic reduction was an effective method for the Cr(VI), As(V) removal at higher concentrations and degradation of Methylene blue and Congo red under both lower and higher concentrations of azo dyes. © 2019 Elsevier B.V
  6. Keywords:
  7. Cellulose acetate ; Photocatalyst ; SWCNT/Fe3O4/TiO2 ; Adsorbent ; Azo dye ; Iron oxide ; Nanocomposite ; Single walled nanotube ; Titanium dioxide ; Carbon nanotube ; Chromium hexavalent ion ; Ferric ion ; Ferric oxide ; Nanofiber ; Aqueous solution ; Article ; Catalyst ; Chemical parameters ; Concentration (parameter) ; Contact time ; Desorption ; Fourier transform infrared spectroscopy ; PH ; Photocatalysis ; Scanning electron microscopy ; Synthesis ; Thermogravimetry ; Transmission electron microscopy ; Waste component removal ; X ray diffraction ; Chemistry ; Isolation and purification ; Solution and solubility ; Ultrastructure ; Water pollutant ; Adsorption ; Arsenic ; Catalysis ; Cellulose ; Chitosan ; Chromium ; Congo Red ; Ferric Compounds ; Kinetics ; Methylene Blue ; Nanofibers ; Nanotubes, Carbon ; Regression Analysis ; Solutions ; Thermogravimetry ; Titanium ; Water Pollutants, Chemical
  8. Source: International Journal of Biological Macromolecules ; Volume 140 , 2019 , Pages 1296-1304 ; 01418130 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0141813019343880