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A novel powder catalyst Cu-Cr-O applied to the synthesis of carbon nanotubes(CNTs) was developed, which was prepared via ammonia precipitation method. Techniques of thermo-gravimetric/ differential scanning calorimeter(TG-DSC), X-ray diffraction(XRD) as well as scanning electron microscopy(SEM) and transmission electron microscopy(TEM) have been employed to characterize the thermal decomposition procedure, crystal phase and micro structural morphologies of the as-synthesized materials, respectively. The results show that carbon nanotubes are successfully synthesized using Cu-Cr-O as catalyst when the precursors are calcined at 400, 500, 600, and 700 ℃. The results indicate that the calcination of the Cu-Cr-O catalyst at 600 ℃ is an effective method to get MWCNT with few nano-tube defects or amorphous carbons.
A novel powder catalyst Cu-Cr-O applied to the synthesis of carbon nanotubes (CNTs) was developed, which was prepared via ammonia precipitation method. Techniques of thermo-gravimetric / differential scanning calorimeter (TG- XRD) as well as scanning electron microscopy (SEM) have been employed to characterize the thermal decomposition procedure, crystal phase and micro structural morphologies of the as-synthesized materials, respectively. The results show that carbon nanotubes are successfully synthesized using Cu-Cr-O as catalyst when the precursors are calcined at 400, 500, 600, and 700 ° C. The results indicate that the calcination of the Cu-Cr-O catalyst at 600 ° C. is an effective method to get MWCNT with few nano-tube defects or amorphous carbons.