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Synthesis of C60 and Endohedral Fullerenes in New Multi-Channel Arc Reactor Equipped with Horizontal Graphite Electrodes

Falahati, Reza | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44792 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Ghanbari, Bahram
  7. Abstract:
  8. One of the most common methods of producing fullerenes is electric arc vaporization of graphite. Due to the low yield and purity of the nanoparticles in this method, the synthesis and isolation of the area research is important. In this work, the production was improved in a multi-channel arc reactor in which having horizontal graphite electrodes. The influence of various operational parameters such as pressure of inert gas, spark time, interval time between two sparks, voltage and current were completely optimized. Moreover, the prominent advantage of the new reactor was increasing the number of manufacturing units, at least from one to three, which the production of fullerene was increased. After optimization the production of fullerenes, the yield of production determined as 2.5 percent. The percentage notice of C60:C70 fullerenes was on 70:30. After optimization of the production of hollow fullerenes, In this reactor, we started the synthesis of endohedral fullerenes. Liquid column chromatography using alumina as sorbent and hexane as eluent solvent was applied for purification of the sample fullerenes. Then, C60 and C70 fullerenes were characterized by UV-visible, infrared spectroscopics as well as high performance liquid chromatography (HPLC)
  9. Keywords:
  10. Fullerene ; Electric Arcs ; Endohedral Fullerene Synthesis ; Multi-Channel Reactor

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