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Synthesis of AgI Nanoparticle in a New SDR

Baghbani Juybari, Rasoul | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45950 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Molaei Dehkordi, Asghar
  7. Abstract:
  8. In this study, low-cost and simple method of precipitation or reactive crystallization was used to synthesize nanoparticles of silver iodide. For this purpose, the reaction of silver nitrate and potassium iodide along with several surfactants in a rotating disk reactor at ambient temperature and pressure was applied. In addition, the effects of hydrodynamic conditions such as diameter and rotating speed of the disk, feed flow rate, and feed injection location, with some of the effective kinetic parameters in the synthesis such as the concentration of the reactants, type and concentration of the surfactants and free ion ratio and aging time of solutions using dynamic light scattering analysis (DLS) have been studied. Exprimental results indicate that PVP with a molecular weights of 58,000 and a mass ratio of PVP/AgNO3 = 0.5, is the appropriate choice for the type and concentration of surfactants. With increasing concentrations of the reactants to 0.05 M, smaller mean size and better PSD have been obtained. Moreover, it was shown that the use of disk with larger diameter and higher rotating speed provides more appropriate results. With increase the level of iodide ions in the solution, nanoparticles with smaller than 15 nm can be produced. However, with an increase in silver ions, much larger nanoparticles can be obtained. By investigating the reactants injection location on the surface of the disk, it was shown that whatever the nozzles are closer to the center of the disk, nanoparticles with a smaller average size and better size distribution could be produced
  9. Keywords:
  10. Surfactants ; Spinning Disk Reactor ; Precipitation ; Silver Iodide Nanoparticles ; Dynamic Light Scattering

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