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Kinetics Investigation of Oxygen Evolution from Water Oxidation in the Presence of Bismuth Vanadate Nanocatalysts

Moradpour, Amin | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54569 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Rahman Setayesh, Shahrbanoo
  7. Abstract:
  8. In this project, BiVO4 , Mn3O4 and BiVO4- Mn3O4 nanocatalysts were synthesized using the hydrothermal method. The properties of these nanocatalysts were determined by XRD, SEM, FT-IR, DRS, PL, ICP, EDX, BET and AA techniques. Analysys XRD patterns and SEM images of samples confirmed monoclinic structure for BiVO4 and tetragonal structure for Mn3O4. The DRS and PL spectra showed adctrease in the band gap and electron – hole pair recombination for BM 60:40 relative to BiVO4. Oxygen production was studied in the presence of different percentages of BiVO4 and Mn3O4 in BiVO4 - Mn3O4 nanocomposite and was observed that the 60:40 wt.% (Bismuth vanadate 60% and manganese oxide 40%) produced more oxygen than the other percentages. Factors that have a direct impact on oxygen production. such as nano-catalyst content, temperature and pH were investigated. Also oxygen and hydrogen production from the water splitting process was occurred in the presence of nanocamposite (BM 60:40) and solar energy, and it was observed that the nanocamposite is also active in the presence of solar energy. The recovery, reproducibility and stability. Nanocamposite (BM 60:40) for oxygen evultion were investigated, which yielded a relatively good result. The hydrogen evolution frome water splitting in the presence of BM 60:40 nanocamposite was also studied
  9. Keywords:
  10. Water Oxidation ; Bismuth Vanadate ; Nano Catalyst ; Manganese Oxide ; Hydrogen Evolution ; Oxygen Evolution ; Hydrothermal Method

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