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Title page for etd-0702104-113305


URN etd-0702104-113305 Statistics This thesis had been viewed 2213 times. Download 14 times.
Author Kai-Hsuan Hung
Author's Email Address hksmexx@yahoo.com.tw
Department Materials Engineering
Year 2004 Semester 1
Degree Master Type of Document Master's Thesis
Language English Page Count 46
Title SYNTHESIS OF CARBON NANOFIBERS UPON ACTIVATED CARBON FIBER CLOTH
Keyword
  • Carbon nanofiber
  • Activated carbon fiber
  • Activated carbon fiber
  • Carbon nanofiber
  • Abstract  Activated carbon fibers are excellent adsorbent materials with a large surface area. In this study, activated carbon fiber cloths were used as catalyst support and impregnated with cobalt or nickel nitrate solution to carry the nitrate salt. After the chemical vapor deposition process, the synthesis of carbon nanofibers are uniform, densely grown upon activated carbon fiber cloths. When impregnated with nitrate solution, the surface functional groups of activated carbon fiber can reduce the metal ion directly by redox adsorption. The carbon atoms of activated carbon fiber itself can reduce the nitrate salt at higher temperature about 550℃. In order to avoid the weight loss from reduction reaction, the synthesis temperature of carbon nanofibers have been limited below 550℃. Carbon nanofibers grown upon activated carbon fiber cloth from a three dimensional network structure. In the thermogravimetric analysis, both the weight ratios of carbon substrate and carbon nanofibers are 40 wt%. The diameter of carbon nanofibers was influenced by the concentration of nitrate solution and adsorption property of activated carbon fiber. Observations of SEM and TEM indicate that the synthesis of carbon nanofibers follows tip growth model. The grapheme planes of nanofibers are stacked to form a herringbone structure with an obviously hollow tunnel.
    Advisor Committee
  • Shinn-Shyong Tzeng - advisor
  • Chi-Yuan Huang - co-chair
  • Tse-Hao Ko - co-chair
  • Files indicate in-campus access only
    Date of Defense 2004-06-11 Date of Submission 2004-07-02


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