Publication: Temperature dependence of iron oxide-graphene oxide properties for synthesis of carbon nanotube/graphene hybrid material
Issued Date
2020-01-01
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ISSN
09205861
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2-s2.0-85078526848
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Mahidol University
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SCOPUS
Bibliographic Citation
Catalysis Today. (2020)
Suggested Citation
Oukrit Thonganantakul, Sira Srinives, Weerawut Chaiwat, Konrat Kerdnawee, Komkrit Suttiponparnit, Tawatchai Charinpanitkul Temperature dependence of iron oxide-graphene oxide properties for synthesis of carbon nanotube/graphene hybrid material. Catalysis Today. (2020). doi:10.1016/j.cattod.2020.01.016 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/53635
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Title
Temperature dependence of iron oxide-graphene oxide properties for synthesis of carbon nanotube/graphene hybrid material
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.