Abstract
The decisive aim of this work relies on studying the impact of catalytic reaction temperature on the physiognomies of the carbon nanotubes (CNTs) synthesized through the catalytic chemical vapor deposition (CCVD) technique. LaNi5Pt0.5 alloy catalyst was employed to mediate the nucleation and growth of CNTs under three different reaction temperatures. Preliminarily, X-ray diffraction analysis and Raman spectroscopical investigation confirm the successful formation of carbon material under the reported reaction parameters. Further, the morphological diversity of CNTs produced through the influence of reaction temperature is verified through Field emission scanning electron microscopy and transmission electron microscopy. The CNTs were observed as helically coiled, Ni encapsulated, and hollow with a narrow cavity at 600 °C, 700 °C, and 800 °C respectively. Moreover, selected area electron diffraction analysis and energy dispersive X-ray analysis authenticated the aforementioned inferences. A detailed study of the growth mechanism based on the reaction temperature and its influences on the catalyst bed and decomposition of the carbon source is proposed. Finally, the prepared CNTs were distinguished through the magnetic coercivity values and the magnetic properties were studied.
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