Loading...

Degradation of Organic Pollutants in Water by Advanced Oxidation Process Using MIL-based Nanostructured Catalyst

Kamandi, Ramtin | 2021

1360 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53625 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Kazemini, Mohammad; Mahmoodi, Nyaz Mohammad
  7. Abstract:
  8. Octahedral crystals of Fe-Metal-organic frameworks like Fe-MIL-101, which is the most stable and active metal-organic frameworks; in combination with graphitic carbon nitride nanosheets could significantly enhance the photocatalytic activity of g-C3N4 for inorganic dye degradation under the irradiation of visible light application. This appropriate cocatalyst modifies the performance of semiconductor via suppressing the recombination of photo-induced carriers and since the synthesized composite prepared by in-situ procedure possesses close contact between each other, the migration of electrons in the photocatalytic reaction will be continued, so the degradation process via the active species generated by those electrons will be carried on. The highest degradation efficiency achieved over MIL-101(Fe)/g-C3N4 nanocomposite was 99.3 % while the pristine g-C3N4 degraded only 40 % of the pollutants by [photocatalyst dosage = 0.005 g]; [pH = 4.8 (normal)]; [irradiation time = 90 min] conditions. Using XRD, FTIR, SEM, EDS elemental mapping, DRS, PL, BET/BJH the pristine samples and composite have been characterized. The size of MIL-101(Fe) crystals diameters are in the range of 70-120 nm. The calculated rate constant, k, RhB degradation by MIL-101(Fe)/g-C3N4 composite in the presence of H2O2 was approximately 100 times higher than that achieved by bare g-C3N4. Furthermore, the MIL-101(Fe)/g-C3N4/visible light/H2O2 systems obey the Zero-order kinetics while the pristine g-C3N4 and Fe-MIL-101(Fe) obey second- and first-order kinetics, respectively. It is obvious that the introduction of g-C3N4 nanosheets in the synthesis procedure of MIL-101(Fe), dramatically affects the kinetics of RhB dye degradation in presence of H2O2 under irradiation of visible light
  9. Keywords:
  10. Photocatalyst ; Visible Light ; Synthesis ; Rhodamine B ; Dye Degradation ; Metal-Organic Framework ; Graphitic Carbon Nitride ; Degradation Pollutants

 Digital Object List

 Bookmark

...see more