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Catalytic graphitization behavior of phenolic resins by addition of in situ formed nano-Fe particles

Rastegar, H ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1016/j.physe.2018.03.013
  3. Publisher: Elsevier B.V , 2018
  4. Abstract:
  5. This work presents the catalytic graphitization process of phenolic resins (PR's) by addition of in situ nano-Fe particles as catalyst. Pyrolysis treatments of prepared compositions including various contents of nano-Fe particles were carried out at 600–1200 °C for 3 h under reducing atmosphere and graphitization process were evaluated by different techniques such as X-Ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), High Resolution Transmission Electron Microscopy (HRTEM), Simultaneous Thermal Analysis (STA) and Raman spectroscopy that mainly performed to identify the phase and microstructural analysis, oxidation resistance and extend of graphitized carbon formation. Results indicate that, in situ graphitic carbon development were already observed after firing the samples at 800 °C for 3 h under reducing atmosphere, increasing temperature and amount of nano-Fe led to a more effective graphitization level. In addition, the different nano crystalline carbon shapes such as onion and bamboo like and carbon nanotubes (CNTs) were in situ identified during graphitization process of nano-Fe containing samples. It was suggested that formation of these different nano carbon structures related to nano-Fe catalyst behavior and the carbon shell growth. © 2018 Elsevier B.V
  6. Keywords:
  7. Carbon nanotubes (CNTs) ; Phenolic resin ; Carbon nanotubes ; Catalysts ; Electron microscopy ; Field emission microscopes ; Graphite ; Graphitization ; Nanotubes ; Phenolic resins ; Resins ; Scanning electron microscopy ; Synthetic resins ; Thermoanalysis ; X ray diffraction ; Yarn ; Catalytic graphitization ; Field emission scanning electron microscopy ; Graphitization process ; Increasing temperatures ; Microstructural analysis ; Nano-Fe ; Reducing atmosphere ; Simultaneous thermal analysis ; High resolution transmission electron microscopy
  8. Source: Physica E: Low-Dimensional Systems and Nanostructures ; Volume 101 , 2018 , Pages 50-61 ; 13869477 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S138694771830095X