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Synthesis and Investigation of Antibacterial Activity of Nanostructures Carbon Nitride g-C3N4 Photocatalyst under Visible Light

Ahmadi, Marzie | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48382 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): RoustaAzad, Reza; Vosoughi, Manouchehr; Padervand, Mohsen
  7. Abstract:
  8. Carbon nitride is a compound that has the proper energy gap (2.7 eV) for activities in the visible light. In this research, photocatalysts based on nanoporous Carbon nitride sheets was synthesized with three primary ingredient (urea, melamine and melamine hydrochloride) by pyrolysis method. Ag, Cu, Fe2O3 and Fe3O4 were added to the system to prevent the electron-hole recombination as well as increscent the photocatalytic activity. The chemical bonding state properties and microstructure of the synthesized photocatalysts were investigated by means of XRD, SEM, BET, FTIR, DRS and PL methods. In the first step of the research, the activity of prepared compounds was analyzed by visible light for the destruction of textile dyes Acid Blue 92 (environmental pollutants). In this study, the degree of reaction and reaction rate constants decoloration were determined. The effect of various parameters such as the catalyst concentration, the concentration of dye, pH, dark test and repeatability test was evaluated and the optimal value of each factor was determined. Finally the activity of the synthesized photocatalysts were compared and the best catalysts for the destruction of the dye was found. In the second step, antibacterial effect of catalysts, in the presence of visible light and darkness were examined. Tests on the field to verify and averaged each were repeated several times. The curves show that catalysts has important role in the degradation of Escherichia coli and Staphylococcus aureus pathogenic bacteria
  9. Keywords:
  10. Pyrolysis ; Acid-Blue 92 ; Staphylococcus Aureus ; Escherichia Coli Bacteria ; Carbon Nitride Photocatalyst

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