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Ragheb Sarand, Akram | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43362 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Mahmoodi Hashemi, Mohammed; Rajab Zade, Ghadir
  7. Abstract:
  8. TiO2/SiO2/HPAsnanocompositeswas prepared by the sol-gel technique at room tempareture and used as the heterogeneous catalysts for the acylation of alcohols employing acetic anhydrid under solvent-free conditions at room tempareture. It was found that the catalytic activity of TiO2/SiO2/HPAs, in all cases of HPAs, was much higher than that of TiO2/SiO2. The most catalytic activity was obtained by TiO2/SiO2/H14NaP5W30O110 which completed the acylation reaction of benzyl alcohol at 1h. Examining the various concentrations of H14NaP5W30O110 in the composite, 9% w/w concentration of TiO2/SiO2/HPAs showed maximum catalytic activity, and by increasing the HPA concentration, activity remains constant. The tailored catalyst was characterized by using FT-IR, XRD and TEM
  9. Keywords:
  10. Nanocomposite ; Sol-Gel Method ; Heterogeneous Catalysis ; Heteropoly Acide Catalyst ; Acylation Reaction

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