A study of cobalt catalyst preparation for carbon nanotube powder growth by using alcohol catalytic chemical vapor deposition

Mohd Azman, Mohamad Huzaifa (2016) A study of cobalt catalyst preparation for carbon nanotube powder growth by using alcohol catalytic chemical vapor deposition. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The thesis discusses the Carbon Nanotubes (CNTs) unique properties especially for supercapacitor applications (use of CNT in fabricating electrode to induce electrical function), which triggers the idea to do this research, followed by the preparation step, parametric study, and from the prepared cobalt catalyst, its growth characterization is analyzed. The research started with the preparation of cobalt catalyst by using sol-gel method, which used of cobalt acetate tetrahydrate and 2-amino ethanol solvent, followed by actual growth of CNT by using the prepared catalyst in Alcohol Catalytic Chemical Vapour Deposition (ACCVD). Once the cobalt-based catalyst powders were prepared, the resulting powders were characterized by using X-ray Diffraction (XRD, Optical Microscopy and Particle Size Analyzer, and then tested to grow CNTs at 700, 750, 800, and 850 °C, where other parameters were fixed in order to determine the effect of CVD processing temperature on the quality of resulting carbon-based materials. The resulting carbon-based materials were analyze by using Raman Spectroscopy where D-band and G-band of each resulting powders were observed. It was found that in this research, by using the prepared cobalt catalyst, the best CVD processing temperature was 850 °C with IG/ID ratio were 1.052, which was the highest among the tested temperatures. But to obtain the resulting carbon-based powders were troublesome, so a new design of ACCVD furnace was proposed.

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