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Title: Temperature dependence of iron oxide-graphene oxide properties for synthesis of carbon nanotube/graphene hybrid material
Authors: Oukrit Thonganantakul
Sira Srinives
Weerawut Chaiwat
Konrat Kerdnawee
Komkrit Suttiponparnit
Tawatchai Charinpanitkul
PTT Public Company Limited
Chulalongkorn University
Mahidol University
Research Network of NANOTEC-KU on Nanocatalyst and Nanomaterials for Sustainable Energy and Environment
Keywords: Chemical Engineering;Chemistry
Issue Date: 1-Jan-2020
Citation: Catalysis Today. (2020)
Abstract: © 2020 Elsevier B.V. Iron oxide embedded on graphene oxide (Fe2O3/GO) was prepared by chemical exfoliation followed by wet impregnation. Reduced Fe2O3/GO could be employed as catalyst for synthesizing carbon nanotubes CNTs via catalytic chemical vapor deposition CCVD of n-hexane within a temperature range of 700-1000 °C. It was found that during the synthesis process, pretreatment affected the transformation of iron nanoparticles in the Fe2O3/GO, leading to significant difference in formation of carbon nanoparticles. When the Fe2O3/GO was employed within a temperature range of 700−900 °C, Fe2O3 was reduced to α-Fe, yielding CNT growth on the graphene surface. However, the α-Fe could be transformed to γ-Fe when the Fe2O3/GO was subject to the temperature of 1000 °C, resulting in formation of carbon spheres instead of CNTs. After experimentally verified, conceptual scenarios of CNT/graphene hybrid material formation with respect to the pretreatment and synthesis temperature were proposed and discussed.
ISSN: 09205861
Appears in Collections:Scopus 2020

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