Loading...

Preparation of Magnetically Recyclable Silica Supported Oxovanadium Nanocatalyst and its Application in the Oxidation of Sulfides

Navi, Hossein | 2021

210 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54983 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Bagherzadeh, Mojtaba
  7. Abstract:
  8. Current study reports a state-of-the-art approach for synthesis of nanocatalyst based on Oxo-vanadium Schiff base complex which itself is, covalently, immobilized on core-shell magnetic nanoparticles of silica-modified magnetite (Fe3O4@SiO2) and the substantial potential it offers as heterogeneous catalyst in selective oxidation of sulfides.Synthesized materials and complexes in this project were characterized by means of modern spectral devices such as FT-IR, XRD and SEM.Unlike routine process of the preparation of heterogeneous catalysts that requires further modification of the core-shell nanoparticles with capping agents, here we have been capable of cutting some time-consuming steps necessary to immobilization of metal complex on the core-shell support. Having designed and synthesized a specific Schiff base with hydroxyl groups, then the metal complex was anchored on the MNPs through the covalent bond formation that follows the hydrolysis reaction between hydroxyl groups of the ligand and those dangling on the silica surface. ICP-OES analysis has provided substantial evidence on the successful immobilization. The final, desired product that is characterized by the benefit of being magnetically separable (Fe3O4@SiO2@VO(salen)) was put into practice by catalyzing selective oxidation of sulfides and exhibited notable selectivity & conversion values in comparison with recent studies
  9. Keywords:
  10. Catalytic Oxidation ; Magnetic Separation ; Sulfide Oxidation ; Magnetic Recyclability ; Silica Support ; Vanadium Complex

 Digital Object List

 Bookmark

No TOC